Art Hoover
- Listed as
- authorized agent-others, contractor, pmt consultant/expediter
- Firm
- Matrix Hg Inc
- Based in
- Concord
- On San Francisco permits
- Aug 2005 to Sep 2026
206 permits since 2000 (contractor on 206 permits, authorized agent-others on 5 permits, pmt consultant/expediter on 1 permit): 153 completed, 13 in progress, 30 never finaled, 10 expired or cancelled.
This is the city’s permit record, not a license check: the role and the number come from what was written on each permit (the number spelled one way). It does not show whether the license is current. Their ranked record as a contractor is on their contractor page. How to read these records
Most recent permits
Showing the 100 most recent of 206.
| Filed | Outcome | Address | Contractor | Work described on the permit | Declared cost |
|---|---|---|---|---|---|
| Sep 18, 2026 | In progress issued Sep 2026 | 655 Montgomery St | Matrix Hg Inc | 10th floor: install vfd on (e) supply fan. no other modifications to the building (e) mech system are included.Details
10th floor: install vfd on (e) supply fan. no other modifications to the building (e) mech system are included. | $71,000 |
| Aug 28, 2026 | In progress issued Aug 2026 | 1945 Irving St | Matrix Hg Inc | replacement of four rooftop package a/c units with gas heating. same location of roofDetails
replacement of four rooftop package a/c units with gas heating. same location of roof | $47,000 |
| Aug 28, 2026 | In progress issued Aug 2026 | 2485 San Bruno Av | Matrix Hg Inc | replacement of three rooftop package a/c units with gas heating.Details
replacement of three rooftop package a/c units with gas heating. | $31,000 |
| Aug 21, 2026 | In progress issued Aug 2026 | 180 Montgomery St | Matrix Hg Inc | ste 1675: provide and install the new exhaust fan for server room. redistribute (1) low side duct runs for new space layout for wellness room. add supplies and returns in (1) new space with reference to pa # 202608035968 & 202605111055Details
ste 1675: provide and install the new exhaust fan for server room. redistribute (1) low side duct runs for new space layout for wellness room. add supplies and returns in (1) new space with reference to pa # 202608035968 & 202605111055 | $17,600 |
| Aug 13, 2026 | In progress issued Aug 2026 | 1570 Bay St | Matrix Hg Inc | replacement of 3 bard units, 2 serving the swgr building and 1 serving the battery building and structural support to support the units. no new fire smoke dampers required.Details
replacement of 3 bard units, 2 serving the swgr building and 1 serving the battery building and structural support to support the units. no new fire smoke dampers required. | $62,906 |
| Jun 24, 2026 | In progress issued Jun 2026 | 150 California St | Matrix Hg Inc | replace 2 existing boilers with new condensing gas fire boilers located in the roof penthouse.Details
replace 2 existing boilers with new condensing gas fire boilers located in the roof penthouse. | $198,000 |
| May 22, 2026 | Completed final sign-off Jul 2026 | 99 Rhode Island St | Matrix Hg Inc | to obtain final inspection for work approved under pa #201909192116 all work completedDetails
to obtain final inspection for work approved under pa #201909192116 all work completed | |
| May 15, 2026 | Completed final sign-off Jun 2026 | 2300 Harrison St | Matrix Hg Inc | 2/f: restroom exhaust fan, ductwork, and outlets. one vav box relocation. ref permit 202604139302Details
2/f: restroom exhaust fan, ductwork, and outlets. one vav box relocation. ref permit 202604139302 | $15,000 |
| Apr 8, 2026 | In progress issued May 2026 | 300 Clay St | Matrix Hg Inc | installation of a mechanical service access platform and ladder in the street level fan roomDetails
installation of a mechanical service access platform and ladder in the street level fan room | $75,000 |
| Apr 8, 2026 | In progress issued Apr 2026 | 300 Clay St | Matrix Hg Inc | 26/f: replace the (e) general exhaust fan, ef-3, located on the 26th floor of one maritime plaza, with a 31,200 cfm variable - volume exhaust fan to increase tenant exhaust airflow capacity. the exhaust riser will be reused.Details
26/f: replace the (e) general exhaust fan, ef-3, located on the 26th floor of one maritime plaza, with a 31,200 cfm variable - volume exhaust fan to increase tenant exhaust airflow capacity. the exhaust riser will be reused. | $90,000 |
| Apr 3, 2026 | In progress issued Apr 2026 | 650 Davis St | Matrix Hg Inc | 1st floor: furnish and install (1) heat pump unit. furnish and install associated ductwork and air registers/diffusers. ref# 2026-0218-6079.Details
1st floor: furnish and install (1) heat pump unit. furnish and install associated ductwork and air registers/diffusers. ref# 2026-0218-6079. | $8,400 |
| Mar 3, 2026 | Completed final sign-off Aug 2026 | 655 Beach St | Matrix Hg Inc | suite 210: hvac modifications to support interior tenant improvements. all terminal units are existing to remain. (e) central equipment is existing to remain. (e) controls to remain. ref building permit 202512151752.Details
suite 210: hvac modifications to support interior tenant improvements. all terminal units are existing to remain. (e) central equipment is existing to remain. (e) controls to remain. ref building permit 202512151752. | $136,068 |
| Feb 19, 2026 | Completed final sign-off Apr 2026 | 180 Montgomery St | Matrix Hg Inc | ste, 1900 hvac modifications to support interior ti (e) central equipment to remain. (e) controls to remain. ref pa 202512030868Details
ste, 1900 hvac modifications to support interior ti (e) central equipment to remain. (e) controls to remain. ref pa 202512030868 | $15,000 |
| Dec 12, 2025 | Completed final sign-off May 2026 | 288 West Portal Av | Matrix Hg Inc | like for like replacement of 3 rooftop packaged a/c gas pack unitsDetails
like for like replacement of 3 rooftop packaged a/c gas pack units | $30,000 |
| Nov 5, 2025 | Completed final sign-off Feb 2026 | 655 Montgomery St | Matrix Hg Inc | 11/fl- install (n) variable frequency drive on (e) supply fan. no other work to be done on the (e) mechanical system are includedDetails
11/fl- install (n) variable frequency drive on (e) supply fan. no other work to be done on the (e) mechanical system are included | $71,389 |
| Oct 23, 2025 | Completed final sign-off Jan 2026 | 2350 Turk Bl | Matrix Hg Inc | replacement of (e) flue stack serving (e) heating boiler and domestic hot water heater at the school of education bldg. provide new inline draft fan for flue stack.Details
replacement of (e) flue stack serving (e) heating boiler and domestic hot water heater at the school of education bldg. provide new inline draft fan for flue stack. | $100,000 |
| Oct 10, 2025 | Completed final sign-off Sep 2026 | 180 Montgomery St | Matrix Hg Inc | suite 2150. demolish all (e) low pressure and air distribution down stream of the terminal units. install new low pressure ductwork and air distribution to match the new t.i. layout. install one new cooling only terminal unit. install all new thermostasts based on the t.i. layout. install newDetails
suite 2150. demolish all (e) low pressure and air distribution down stream of the terminal units. install new low pressure ductwork and air distribution to match the new t.i. layout. install one new cooling only terminal unit. install all new thermostasts based on the t.i. layout. install new | $86,763 |
| Sep 26, 2025 | Completed final sign-off Mar 2026 | 1 Lombard St | Matrix Hg Inc | replace rooftop unit, existing unit weight = 685lb, new unit weight = 565lb.Details
replace rooftop unit, existing unit weight = 685lb, new unit weight = 565lb. | $42,375 |
| Aug 29, 2025 | Completed final sign-off Feb 2026 | 315 Montgomery St | Matrix Hg Inc | 5th fl - replacement of (1) 3 ton water source heat pump. the equipment is above ceiling & serves a 5th l iof closetDetails
5th fl - replacement of (1) 3 ton water source heat pump. the equipment is above ceiling & serves a 5th l iof closet | $15,000 |
| Jul 1, 2025 | Completed final sign-off Dec 2025 | 101 02nd St | Matrix Hg Inc | replace (e) trane 10-ton cooling only package unit with new trane 10-tom. package unit and reconnect to existing ductwork and electrical. no work in the interior of the buildingDetails
replace (e) trane 10-ton cooling only package unit with new trane 10-tom. package unit and reconnect to existing ductwork and electrical. no work in the interior of the building | $35,524 |
| Jun 16, 2025 | Completed final sign-off Jan 2026 | 300 Clay St | Matrix Hg Inc | add (3) overhead electric heaters in an existing outdoor dining area for an existing restaurant.Details
add (3) overhead electric heaters in an existing outdoor dining area for an existing restaurant. | $36,789 |
| May 28, 2025 | Completed final sign-off Sep 2025 | 180 Montgomery St | Matrix Hg Inc | suite 2300 ref pa 2025-0402-3549 relocate (e) low pressure ductwork and air distribution to match now ti layout. install new transfer fan for it closet. relocate thermostats as needed to accommodate new ti layout. install one new vav and associated low pressure ductwork and air distributionDetails
suite 2300 ref pa 2025-0402-3549 relocate (e) low pressure ductwork and air distribution to match now ti layout. install new transfer fan for it closet. relocate thermostats as needed to accommodate new ti layout. install one new vav and associated low pressure ductwork and air distribution | $63,694 |
| Mar 21, 2025 | Completed final sign-off Jun 2025 | 33 New Montgomery St | Matrix Hg Inc | hvac modifications to support interior ti. all other terminal units are existing to remain. (e) central equipment existing to remain. (e) pneumatic controls to remain. ref pa 202503061735Details
hvac modifications to support interior ti. all other terminal units are existing to remain. (e) central equipment existing to remain. (e) pneumatic controls to remain. ref pa 202503061735 | $10,000 |
| Mar 20, 2025 | Completed final sign-off Nov 2025 | 555 California St | Matrix Hg Inc | basement - installation of a new cooling coil in (e) air handler; installation of 3 (n) condensing units, each; installation of 6 (n) exv's for cus & coils; install refrigerant pipe for cu/exv/coils; pour concrete pads for condensing unitsDetails
basement - installation of a new cooling coil in (e) air handler; installation of 3 (n) condensing units, each; installation of 6 (n) exv's for cus & coils; install refrigerant pipe for cu/exv/coils; pour concrete pads for condensing units | $103,000 |
| Feb 13, 2025 | In progress issued Feb 2025 | 300 Clay St | Matrix Hg Inc | fire sequence change. revision to pa#2024-0724-7142Details
fire sequence change. revision to pa#2024-0724-7142 | $50,000 |
| Feb 3, 2025 | Completed final sign-off Jan 2026 | 180 Howard St | Matrix Hg Inc | 1st/fl- ref 202410243671- hvac modifications to support interior tenant improvements, (n) grills, registers, diffusrs, and ductwork. install 1 (n) exhaust fan.Details
1st/fl- ref 202410243671- hvac modifications to support interior tenant improvements, (n) grills, registers, diffusrs, and ductwork. install 1 (n) exhaust fan. | $168,000 |
| Jan 28, 2025 | Completed final sign-off Jan 2026 | 255 California St | Matrix Hg Inc | basement: replace 1) 250 ton chiller, install ref, nonitor device, install new sf & ef fansf for ref, ventilation new ufds for e) pumps, rework electrical for chiller & pumps new electrical for fans & ref. monitor, chiller in basementDetails
basement: replace 1) 250 ton chiller, install ref, nonitor device, install new sf & ef fansf for ref, ventilation new ufds for e) pumps, rework electrical for chiller & pumps new electrical for fans & ref. monitor, chiller in basement | $250,000 |
| Dec 20, 2024 | Completed final sign-off Jan 2025 | 400 Mcallister St | Matrix Hg Inc | install one new 1.5 ton ductless mini -split unit to serve recently refurbished elevator machine room no architctural work machine room was recently refurbished under pa# 2023-0922-7195 & 2023-0221-2290Details
install one new 1.5 ton ductless mini -split unit to serve recently refurbished elevator machine room no architctural work machine room was recently refurbished under pa# 2023-0922-7195 & 2023-0221-2290 | $53,434 |
| Dec 13, 2024 | In progress issued Dec 2024 | 50 Green St | Matrix Hg Inc | to obtain final inspection for work approved under pa# 201812178453. all work is complete.Details
to obtain final inspection for work approved under pa# 201812178453. all work is complete. | |
| Sep 24, 2024 | In progress filed Sep 2024, not yet issued | 300 Clay St | Matrix Hg Inc | revision to 202407247142. fire sequence change return air duct addDetails
revision to 202407247142. fire sequence change return air duct add | $50,000 |
| Sep 24, 2024 | Completed final sign-off Jul 2025 | 300 Clay St | Matrix Hg Inc | ground fl - replace (e) mechanical system serving the plaza level tenant space, bar sprezzatura. relocate heat pumps to permanent locations on ground fl; connect plaza level return to the heat pump units. unit not in the restaurantDetails
ground fl - replace (e) mechanical system serving the plaza level tenant space, bar sprezzatura. relocate heat pumps to permanent locations on ground fl; connect plaza level return to the heat pump units. unit not in the restaurant | $352,749 |
| Aug 23, 2024 | Completed final sign-off Oct 2024 | 301 Howard St | Matrix Hg Inc | 14/f suite 1400: hvac modification to support interior tenant improvements no new fsd's ref pa# 2024-0530-3259Details
14/f suite 1400: hvac modification to support interior tenant improvements no new fsd's ref pa# 2024-0530-3259 | $17,500 |
| Aug 16, 2024 | Completed final sign-off Sep 2024 | 601 California St | Matrix Hg Inc | 3/f-ste 300:hvac modifications to support interior tenant improvement ref pa# 202406214979.Details
3/f-ste 300:hvac modifications to support interior tenant improvement ref pa# 202406214979. | $22,000 |
| Jul 24, 2024 | Completed final sign-off Aug 2025 | 300 Clay St | Matrix Hg Inc | replace (2) air handling units, vavs and coils.Details
replace (2) air handling units, vavs and coils. | $800,000 |
| Jun 21, 2024 | Completed final sign-off Aug 2024 | 300 Clay St | Matrix Hg Inc | suite 15 1st fl: demo mopsink faucet and fixture trim. install airgap fitting to (e) handsink. install grease intercepter and modify (e) sanitary drain and vent piping for connection. install kitchen sink and connect to (e) cw and hw piping.Details
suite 15 1st fl: demo mopsink faucet and fixture trim. install airgap fitting to (e) handsink. install grease intercepter and modify (e) sanitary drain and vent piping for connection. install kitchen sink and connect to (e) cw and hw piping. | $20,000 |
| Apr 5, 2024 | In progress issued Apr 2024 | 595 Market St | Matrix Hg Inc | 13th fl, #1350 - revision to pa 202310259457 t-24 pages were updated to show correct forms neededDetails
13th fl, #1350 - revision to pa 202310259457 t-24 pages were updated to show correct forms needed | |
| Feb 23, 2024 | Completed final sign-off May 2024 | 650 California St | Matrix Hg Inc | 27th fl ti using base building hvac system. modifications to air distribution system in tenant space to suite arch renovations, includidng installation of water source heat pump and associated ductwork. no new fire smoke dampers required. ref 202401123873 and 202310259410Details
27th fl ti using base building hvac system. modifications to air distribution system in tenant space to suite arch renovations, includidng installation of water source heat pump and associated ductwork. no new fire smoke dampers required. ref 202401123873 and 202310259410 | $45,000 |
| Jan 29, 2024 | Completed final sign-off Jun 2024 | 120 Kearny St | Matrix Hg Inc | 34/f-ste 3450: modification to air distribution system in tenant space to suite architectural renovations, ref ti pa# 202311211204.Details
34/f-ste 3450: modification to air distribution system in tenant space to suite architectural renovations, ref ti pa# 202311211204. | $11,203 |
| Jan 29, 2024 | Completed final sign-off Jun 2024 | 120 Kearny St | Matrix Hg Inc | 27/f-ste 2700: modification to air distribution system in tenant space to suite architectural renovations, ref ti pa# 202311211257.Details
27/f-ste 2700: modification to air distribution system in tenant space to suite architectural renovations, ref ti pa# 202311211257. | $48,834 |
| Jan 29, 2024 | Completed final sign-off Mar 2024 | 655 Montgomery St | Matrix Hg Inc | install variable frequency drives on existing supply fans. no other modifications to the buildings existing mechanical system are includedDetails
install variable frequency drives on existing supply fans. no other modifications to the buildings existing mechanical system are included | $31,698 |
| Jan 12, 2024 | Completed final sign-off May 2024 | 650 California St | Matrix Hg Inc | 27/f: ti using the (e) base building hvac system. modifications to the air distribution system in the tenant space to suit architectural renovations, including installation of new vav boxes and installation of new ductwork, no new fire smoke dampers required. building permit# 202310259410.Details
27/f: ti using the (e) base building hvac system. modifications to the air distribution system in the tenant space to suit architectural renovations, including installation of new vav boxes and installation of new ductwork, no new fire smoke dampers required. building permit# 202310259410. | $69,848 |
| Nov 10, 2023 | Completed final sign-off Mar 2024 | 425 California St | Matrix Hg Inc | 22nd fl - ti project using the (e) base building hvac system modificaitons to the air distribution system in the tenant space to suit architectural renovations, including replacement of vav dual duct boxes and installation of new ductwork for tenant it needs. project also includes installation fanDetails
22nd fl - ti project using the (e) base building hvac system modificaitons to the air distribution system in the tenant space to suit architectural renovations, including replacement of vav dual duct boxes and installation of new ductwork for tenant it needs. project also includes installation fan | $84,239 |
| Oct 5, 2023 | Completed final sign-off Jan 2024 | 1 Lombard St | Matrix Hg Inc | boiler replacement.Details
boiler replacement. | $150,000 |
| Aug 25, 2023 | Completed final sign-off Oct 2023 | 300 Clay St | Matrix Hg Inc | document the previous installtion of variable frequency drives on e supply fans as request by fire life safety contractor. installation of variable frequency drives was by others. no modifications to buildings e mech system included.Details
document the previous installtion of variable frequency drives on e supply fans as request by fire life safety contractor. installation of variable frequency drives was by others. no modifications to buildings e mech system included. | $1,000 |
| Jul 11, 2023 | Never finaled issued Jul 2023, no final | 1074 Connecticut St | Matrix Hg Inc | patch and paint drywall, repair tile in restroom, weatherproof tub and replace window in kitchen to match existing to comply with nov# 202291369.Details
patch and paint drywall, repair tile in restroom, weatherproof tub and replace window in kitchen to match existing to comply with nov# 202291369. | $5,000 |
| Jul 11, 2023 | Completed final sign-off Jan 2024 | 699 08th St | Matrix Hg Inc | replace (e) fuel oil pipe with new.Details
replace (e) fuel oil pipe with new. | $179,620 |
| Jun 9, 2023 | Completed final sign-off Dec 2023 | 250 Clay St | Matrix Hg Inc | replace (2) 20 ton split-system dx units with (2) new 20 ton packaged rooftop cooling only ac units, miscellaneous duct work modificationsDetails
replace (2) 20 ton split-system dx units with (2) new 20 ton packaged rooftop cooling only ac units, miscellaneous duct work modifications | $197,568 |
| Feb 2, 2023 | Never finaled issued Feb 2023, no final | 455 Market St | Matrix Hg Inc | hvac tenant improvement install new ater source heat pump, install ceiling plunum, mounted exhaust fan install carbon dioxide sensor. convert e control system to ddc. provide air balancer. base building hvac system remains unchangedDetails
hvac tenant improvement install new ater source heat pump, install ceiling plunum, mounted exhaust fan install carbon dioxide sensor. convert e control system to ddc. provide air balancer. base building hvac system remains unchanged | $149,417 |
| Dec 19, 2022 | Never finaled issued Dec 2022, no final | 255 California St | Matrix Hg Inc | #850: hvac modification to support interior t.i. no new vav terminal units.Details
#850: hvac modification to support interior t.i. no new vav terminal units. | $8,521 |
| Dec 16, 2022 | Completed final sign-off Sep 2023 | 655 Beach St | Matrix Hg Inc | replace (e) colling towner with new. replacement tower in an exact factory replacement with the same operating wirght and electrical chractristcs. chemical treatment is existing to remain.Details
replace (e) colling towner with new. replacement tower in an exact factory replacement with the same operating wirght and electrical chractristcs. chemical treatment is existing to remain. | $207,091 |
| Dec 2, 2022 | Completed final sign-off Apr 2023 | 655 Montgomery St | Matrix Hg Inc | replacement of outside air fan oaf-1 with similar airflow and power requirementsDetails
replacement of outside air fan oaf-1 with similar airflow and power requirements | $177,539 |
| Jul 1, 2022 | Never finaled issued Jul 2022, no final | 255 California St | Matrix Hg Inc | 8th fl ste 800: hvac modifications to support interior tenant improvements. new grills, registers, diffusers and ductwork. ref arch 202206277197.Details
8th fl ste 800: hvac modifications to support interior tenant improvements. new grills, registers, diffusers and ductwork. ref arch 202206277197. | $149,397 |
| Jun 14, 2022 | Completed final sign-off Oct 2022 | 101 Montgomery St | Matrix Hg Inc | ste f: replace 1 4-ton 4-pipe fan coil unit.Details
ste f: replace 1 4-ton 4-pipe fan coil unit. | $46,323 |
| Jun 7, 2022 | Completed final sign-off Aug 2022 | 101 Montgomery St | Matrix Hg Inc | 8th flr ste 888 - hvac modifications to support interior heating & cooling system by installing (1) vav box.Details
8th flr ste 888 - hvac modifications to support interior heating & cooling system by installing (1) vav box. | $34,607 |
| Jun 6, 2022 | Completed final sign-off Jan 2023 | 1 Maritime Pz | Matrix Hg Inc | g/f & 26/f - roof: install variable frequency drives on (e) supply fans. no other modifications to the buildings 9e) mechanical system are included. maher n/a.Details
g/f & 26/f - roof: install variable frequency drives on (e) supply fans. no other modifications to the buildings 9e) mechanical system are included. maher n/a. | $24,734 |
| May 26, 2022 | Completed final sign-off Apr 2023 | 1 Maritime Pz | Matrix Hg Inc | fire rated enclosure for flue pipe. ref 202203018952Details
fire rated enclosure for flue pipe. ref 202203018952 | |
| Apr 12, 2022 | Completed final sign-off Jun 2022 | 301 Howard St | Matrix Hg Inc | added controls for (e) exhaust fan for fire department override.Details
added controls for (e) exhaust fan for fire department override. | $5,000 |
| Mar 1, 2022 | Completed final sign-off Apr 2023 | 1 Maritime Pz | Matrix Hg Inc | 2 (e) steam boilers to be removed and replaced. add 4 (n) heating hot water boilers, 3 (n) air separators, 2 (n) heat exchangers, 6 (n) pumps, 2 (n) heating system expansion tanks to be provided to replace 4 (e) expansion tanks. no new fsd's are being added.Details
2 (e) steam boilers to be removed and replaced. add 4 (n) heating hot water boilers, 3 (n) air separators, 2 (n) heat exchangers, 6 (n) pumps, 2 (n) heating system expansion tanks to be provided to replace 4 (e) expansion tanks. no new fsd's are being added. | $2,128,734 |
| Nov 2, 2021 | Completed final sign-off Jan 2022 | 601 California St | Matrix Hg Inc | demo and remove (e) ductwork, furnish and install new dual duct vav terminal. modify (e) duct system. ref pa #2021 0910 8140Details
demo and remove (e) ductwork, furnish and install new dual duct vav terminal. modify (e) duct system. ref pa #2021 0910 8140 | $13,820 |
| Oct 27, 2021 | Completed final sign-off Jan 2022 | 333 Market St | Matrix Hg Inc | adding 1 new heat pump to 6th fl. no new fsd's are being added.Details
adding 1 new heat pump to 6th fl. no new fsd's are being added. | $41,342 |
| Oct 14, 2021 | Never finaled issued Oct 2021, no final | 425 California St | Matrix Hg Inc | install new 1 ton mini split sytem to cool existing it closet. it closet is normally unoccupied.Details
install new 1 ton mini split sytem to cool existing it closet. it closet is normally unoccupied. | $16,494 |
| Jul 28, 2021 | Completed final sign-off Feb 2022 | 1601 19th Av | Matrix Hg Inc | replace 2 castiron hot water boilers with 2 new castiron boilers. reconfigure piping to accommodate new boilers. install new 80 gallon vertical buffer tank and pipe to the new boiler.Details
replace 2 castiron hot water boilers with 2 new castiron boilers. reconfigure piping to accommodate new boilers. install new 80 gallon vertical buffer tank and pipe to the new boiler. | $126,019 |
| Jul 14, 2021 | Completed final sign-off Sep 2021 | 2325 Noriega St | Matrix Hg Inc | replace 4 existing rooftop package units with new of same make and capacity. replacement unit weights are within 5% of the existing unit weight.Details
replace 4 existing rooftop package units with new of same make and capacity. replacement unit weights are within 5% of the existing unit weight. | $28,913 |
| Jul 8, 2021 | Completed final sign-off Oct 2021 | 123 Townsend St | Matrix Hg Inc | roof top: replace (1) heating hot water boiler w/ (2) (n) higher officiency boilers of identical capacity, miscellaneous piping, and miscellaneous hydronic accessories.Details
roof top: replace (1) heating hot water boiler w/ (2) (n) higher officiency boilers of identical capacity, miscellaneous piping, and miscellaneous hydronic accessories. | $134,078 |
| Jun 17, 2021 | Completed final sign-off Feb 2022 | 655 Montgomery St | Matrix Hg Inc | replacement of (2) gas fired boilers with 3 condensing gas fired boilers. hhw pumps (2) replaced with exact replacement as well as hhwp-3 replaced with pump sized for design conditions. replace expansion tank and the addition of an air separator.Details
replacement of (2) gas fired boilers with 3 condensing gas fired boilers. hhw pumps (2) replaced with exact replacement as well as hhwp-3 replaced with pump sized for design conditions. replace expansion tank and the addition of an air separator. | $160,607 |
| Jun 15, 2021 | Never finaled issued Jun 2021, no final | 1656 California St | Matrix Hg Inc | install (1) 3 ton mini split cooling systems to serve it closet.Details
install (1) 3 ton mini split cooling systems to serve it closet. | $15,756 |
| Jun 4, 2021 | Completed final sign-off Nov 2021 | 410 Townsend St | Matrix Hg Inc | replace: 1 cooling tower with new of same capacity, 1 boiler with new of the same capacity,1 primary pump of same capacity, 2 condenser water pumps with new of same capacity.Details
replace: 1 cooling tower with new of same capacity, 1 boiler with new of the same capacity,1 primary pump of same capacity, 2 condenser water pumps with new of same capacity. | $220,000 |
| Jun 1, 2021 | Never finaled issued Jun 2021, no final | 1171 Mission St | Matrix Hg Inc | install new design build hvac system to serve 3/f, install (1) make-up air fan & 24 tons of variable refrigerant flow. provide/install (6) fan coilsDetails
install new design build hvac system to serve 3/f, install (1) make-up air fan & 24 tons of variable refrigerant flow. provide/install (6) fan coils | $187,060 |
| May 18, 2021 | Never finaled issued Sep 2021, no final | 434 Ellis St | Matrix Hg Inc | minor non structural demo. new exterior rooftop mechanical unit to replace existing. new mep work to tie to (e) bldg utilities. no change of building use. no change to (e) parking (no off street parking req'd) no change to (e) bldg footprint, no change to bldg exterior.Details
minor non structural demo. new exterior rooftop mechanical unit to replace existing. new mep work to tie to (e) bldg utilities. no change of building use. no change to (e) parking (no off street parking req'd) no change to (e) bldg footprint, no change to bldg exterior. | $349,413 |
| Dec 14, 2020 | Never finaled issued Feb 2021, no final | 235 Pine St | Matrix Hg Inc | hvac modifications to support interior tenant improvements. ref pa# 202008061204.Details
hvac modifications to support interior tenant improvements. ref pa# 202008061204. | $71,280 |
| Dec 1, 2020 | Completed final sign-off Jul 2021 | 275 Battery St | Matrix Hg Inc | 31/f & r: replace 2 heating hot water boilers with 4 new higher efficiency biolers, misco piping and misc hyronic accessories. maher n/aDetails
31/f & r: replace 2 heating hot water boilers with 4 new higher efficiency biolers, misco piping and misc hyronic accessories. maher n/a | $460,847 |
| Sep 26, 2020 | Completed final sign-off Jan 2021 | 465 California St | Matrix Hg Inc | install new vrf ductless system as part of ti.Details
install new vrf ductless system as part of ti. | $185,967 |
| Aug 22, 2020 | Completed final sign-off Feb 2022 | 100 Montgomery St | Matrix Hg Inc | 18th fl: hvac air distribution modifications to support interior tenant improvementsDetails
18th fl: hvac air distribution modifications to support interior tenant improvements | $103,159 |
| Jul 22, 2020 | Completed final sign-off Dec 2020 | 180 Montgomery St | Matrix Hg Inc | #1850: hvac air distribution modification for t.i.Details
#1850: hvac air distribution modification for t.i. | $30,001 |
| Jul 21, 2020 | Completed final sign-off Apr 2021 | 555 Montgomery St | Matrix Hg Inc | 12th fl: hvac modifications to support interior ti. ref atch ti pa# 202002134365.Details
12th fl: hvac modifications to support interior ti. ref atch ti pa# 202002134365. | $139,100 |
| Jun 2, 2020 | Completed final sign-off Nov 2020 | 101 Henry Adams St | Matrix Hg Inc | replace one heating hot water boiler, primary pumps, and misc. hydronic accessories.Details
replace one heating hot water boiler, primary pumps, and misc. hydronic accessories. | $129,870 |
| May 13, 2020 | Completed final sign-off Jun 2022 | 301 Howard St | Matrix Hg Inc | replace existing chillers and chilled water pumping system. provide new energy management system and intergrate into existing systemDetails
replace existing chillers and chilled water pumping system. provide new energy management system and intergrate into existing system | $1,100,000 |
| Feb 19, 2020 | Expired or cancelled cancelled Jan 2026 | 101 02nd St | Matrix Hg Inc | suite 800: install water source heat pump to serve existing idf closet.Details
suite 800: install water source heat pump to serve existing idf closet. | $39,408 |
| Jan 28, 2020 | Never finaled issued Feb 2020, no final | 300 Montgomery St | Matrix Hg Inc | mech for suite 450: furnish & install new air distribution with new air outlets, new air conditioning unit and new return fan. ref pa #201909091019Details
mech for suite 450: furnish & install new air distribution with new air outlets, new air conditioning unit and new return fan. ref pa #201909091019 | $361,480 |
| Jan 28, 2020 | Completed final sign-off Feb 2020 | 425 California St | Matrix Hg Inc | mech for 1400: new air distribution added to serve new space, new vav boxes (10), and (1) new fsd added. ref pa #201910174872.Details
mech for 1400: new air distribution added to serve new space, new vav boxes (10), and (1) new fsd added. ref pa #201910174872. | $109,879 |
| Dec 26, 2019 | Completed final sign-off Aug 2020 | 1 La Avanzada | Matrix Hg Inc | replace existing split-systm with identical unit by same manufacturerDetails
replace existing split-systm with identical unit by same manufacturer | $84,804 |
| Nov 25, 2019 | Completed final sign-off Aug 2020 | 201 Spear St | Matrix Hg Inc | roof - replace (e) supply fan with new unit (roof) of identical capacity and reconnect existing duct workDetails
roof - replace (e) supply fan with new unit (roof) of identical capacity and reconnect existing duct work | $199,000 |
| Nov 7, 2019 | Completed final sign-off Feb 2020 | 425 California St | Matrix Hg Inc | ste: 300 - ref pa# 201908169025; install (10) new vav boxes, (1) new fsd, and new air distribution to serve new space plan. n/a maherDetails
ste: 300 - ref pa# 201908169025; install (10) new vav boxes, (1) new fsd, and new air distribution to serve new space plan. n/a maher | $122,064 |
| Oct 29, 2019 | Completed final sign-off Jun 2020 | 201 California St | Matrix Hg Inc | replace existing evaporative condenser with a new unit of equal capacity and similar footprint, per plans. modify existing piping to accomodate new condenser. in kind replacement.Details
replace existing evaporative condenser with a new unit of equal capacity and similar footprint, per plans. modify existing piping to accomodate new condenser. in kind replacement. | $285,000 |
| Oct 18, 2019 | Completed final sign-off Mar 2020 | 180 Montgomery St | Matrix Hg Inc | 19/f ste1900: modify duct work for office, add (1) diffuser, insulate ductowrkDetails
19/f ste1900: modify duct work for office, add (1) diffuser, insulate ductowrk | $15,469 |
| Oct 17, 2019 | Completed final sign-off Sep 2021 | 300 Clay St | Matrix Hg Inc | 1/f & 26f: install variable frequency motor drives (vfd) on (e) supply fans, no other modifcations to the (e) mechanical systems are included.Details
1/f & 26f: install variable frequency motor drives (vfd) on (e) supply fans, no other modifcations to the (e) mechanical systems are included. | $45,475 |
| Oct 11, 2019 | Completed final sign-off Dec 2019 | 601 California St | Matrix Hg Inc | 4/f: ref pa# 201909272992; relocate (e) duct work, add new ductwork, air devices, and terminal units as required to accommodate floor plan changes. maher n/a.Details
4/f: ref pa# 201909272992; relocate (e) duct work, add new ductwork, air devices, and terminal units as required to accommodate floor plan changes. maher n/a. | $8,651 |
| Oct 11, 2019 | Never finaled issued Oct 2019, no final | 535 Pacific Av | Matrix Hg Inc | ref pa# 201908027715; furnish & install (1) nine zone vav distriburion systemDetails
ref pa# 201908027715; furnish & install (1) nine zone vav distriburion system | $136,668 |
| Oct 11, 2019 | Expired or cancelled cancelled Jan 2026 | 1 La Avanzada | Matrix Hg Inc | remove & replace (1) split systemDetails
remove & replace (1) split system | $79,084 |
| Sep 19, 2019 | Expired or cancelled cancelled Feb 2021 | 201 California St | Matrix Hg Inc | furnish and install 1 inline fan on spring isolators. furnish and install new ducting from the fan to 2 supply slot grilles. ref app#201902082459Details
furnish and install 1 inline fan on spring isolators. furnish and install new ducting from the fan to 2 supply slot grilles. ref app#201902082459 | $25,000 |
| Sep 19, 2019 | Expired or cancelled expired Jul 2026 | 99 Rhode Island St | Matrix Hg Inc | replace 1 heating hot water boiler, distribution pumps and misc hydront accessories. n/a for maherDetails
replace 1 heating hot water boiler, distribution pumps and misc hydront accessories. n/a for maher | $42,000 |
| Aug 12, 2019 | Completed final sign-off Dec 2019 | 180 Montgomery St | Matrix Hg Inc | furnish and install four cooling vav convert controls to ddc. replace diffusers with supply slots. furnish & install 3 transfer air sound boots. insulate concealed ductwork & hhw piping. ref 201906173573Details
furnish and install four cooling vav convert controls to ddc. replace diffusers with supply slots. furnish & install 3 transfer air sound boots. insulate concealed ductwork & hhw piping. ref 201906173573 | $29,000 |
| Jul 31, 2019 | Completed final sign-off Sep 2020 | 601 California St | Matrix Hg Inc | 4th flr - r&r vav boxes ref 201902052077Details
4th flr - r&r vav boxes ref 201902052077 | $198,721 |
| Jun 12, 2019 | Completed final sign-off Aug 2019 | 555 Montgomery St | Matrix Hg Inc | demo (e) system, install 19 new vav's and associated duct and registers, install odc controls on vav's and install 1 new fsd for return air. ref pa 201904188368.Details
demo (e) system, install 19 new vav's and associated duct and registers, install odc controls on vav's and install 1 new fsd for return air. ref pa 201904188368. | $196,400 |
| Apr 18, 2019 | Never finaled issued Apr 2019, no final | 45 Fremont St | Matrix Hg Inc | replace (e) 3-ton water source heat pump with new n/a maherDetails
replace (e) 3-ton water source heat pump with new n/a maher | $29,684 |
| Apr 10, 2019 | Completed final sign-off Aug 2019 | 123 Mission St | Matrix Hg Inc | 29th fl - replace (2) boilers & distribution pumps and other hydronic specialtiesDetails
29th fl - replace (2) boilers & distribution pumps and other hydronic specialties | $246,000 |
| Feb 4, 2019 | Completed final sign-off Oct 2019 | 235 Pine St | Matrix Hg Inc | 15th floor: ductwork modifications to support interior t.i. ref app#201901100026. n/a for maherDetails
15th floor: ductwork modifications to support interior t.i. ref app#201901100026. n/a for maher | $17,768 |
| Jan 31, 2019 | Completed final sign-off Apr 2019 | 33 New Montgomery St | Matrix Hg Inc | ref pa# 201812289310; revise low pressure air distribution for new partition layout. replace medium pressure flex duct on svav's, install exhaust fan and 2 ton floor mounted wshpDetails
ref pa# 201812289310; revise low pressure air distribution for new partition layout. replace medium pressure flex duct on svav's, install exhaust fan and 2 ton floor mounted wshp | $40,123 |
| Jan 11, 2019 | Completed final sign-off Jun 2020 | 601 California St | Matrix Hg Inc | 1st & mezz: install (n) water cooled vrf hvac system as part of minor tenant improvement on 1st flr and mezzanine. no work to take place in main lobby. sprinkler under sep permit.Details
1st & mezz: install (n) water cooled vrf hvac system as part of minor tenant improvement on 1st flr and mezzanine. no work to take place in main lobby. sprinkler under sep permit. | $148,750 |
| Jan 2, 2019 | Completed final sign-off Jul 2019 | 235 Pine St | Matrix Hg Inc | ste 100: duct work modifications to support interior tenant improvementDetails
ste 100: duct work modifications to support interior tenant improvement | $20,000 |