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(925) 999-4095 · 7AM – 7PM · 7 days · No overtime · CSLB #1136642 · BBB A+
Bay Area HVAC Service

South San Francisco · CSLB #1136642 · family-owned

MRCOOL HVAC in South San Francisco

South San Francisco built its name on biotech and industrial parks east of 101, but most of our MRCOOL calls come from the older homes up in Sunshine Gardens and Avalon, where a family wants one room cooled without touching the rest of the house.

MRCOOL in South San Francisco

People call South San Francisco the Industrial City for a reason. The biotech campuses and warehouse blocks east of the freeway are real employers here, and once in a while that shows up in our MRCOOL work too, a small office or an equipment closet in a light industrial unit that runs hot off its own servers and needs a single head just to keep the room in range. Most calls are still residential though, older homes in Sunshine Gardens and the flats near El Camino Real that were built without central air.

In a lab-support office, the load isn't really about the weather. It's about the equipment. A closet full of freezers or a server rack throws heat all day regardless of what's happening outside, and a MRCOOL head sized for a bedroom won't touch that. I run the actual heat load off the equipment nameplates before recommending anything, because guessing on a room like that just means a callback in a month. On the residential side, it's the usual Peninsula story: a bonus room or garage conversion that bakes in the afternoon and never had a vent run to it.

We're part of the ADRIUM Service Solutions family, owner-operated, CSLB #1136642, EPA 608 certified. We commission these installs, fix the coupler leaks, and coordinate the electrical when a subpanel in an older industrial building can't carry a new circuit without an upgrade. We also cover Brisbane, just north on the same stretch of 101. $99 diagnostic, credited toward the repair, written quote first. Call (925) 999-4095.


MRCOOL work we do in South San Francisco

Supplemental cooling for a biotech equipment closet. A small lab-support office adds a server rack or an extra freezer and the room starts running warm no matter what the thermostat says. I calculate the heat the equipment actually throws off, not just the room's square footage, and size the head to that load. This is a stopgap for a closet-sized room, not a substitute for real precision cooling if the load grows.

Coupler leak repair in an older Sunshine Gardens home. These 1940s and 50s homes went in before central air was standard, and when an owner adds a DIY MRCOOL years later, the quick-connect coupler is the part most likely to be under-torqued. I find the fitting, reseat it, evacuate the line, and recharge to the nameplate weight, checking whether the unit takes R-410A or R-32 first since it changes the recharge.

Dedicated circuit work in an older industrial subpanel. Light industrial buildings east of 101 often have subpanels that were sized decades ago for lighting and small tools, not a new condenser. I bring in a licensed electrician to add a properly sized dedicated circuit and disconnect so the install is safe and passes inspection, rather than tying into a circuit that's already loaded.


MRCOOL in South San Francisco: common questions

Do you have a tech close enough to South San Francisco to make sense?

Yes. We put a technician based on the Peninsula, in San Mateo County, specifically so South San Francisco and the rest of the North Peninsula aren't waiting on someone driving over from San Ramon.

Can a MRCOOL cool a server closet in our office?

For a small closet, often yes, once we size it to the equipment's real heat output instead of the room's square footage. If the room is growing into a real server room, that's a different kind of system, and I'll say so rather than sell you a mini-split that can't keep up.

Do you cover Brisbane from your South City calls?

Yes, Brisbane is right on the way, so it's part of the same coverage area.

Nearby and related

MRCOOL near South San Francisco: San Bruno · Daly City · Millbrae .

Other brands we service in South San Francisco: Ameristar · Bosch · Comfort-Aire · Friedrich · LG · Maytag · Samsung · Amana · American Standard · Bryant · Carrier · Coleman · Cooper & Hunter · Daikin · Ducane · Fujitsu · Goodman · Gree · Heil · Lennox · Mitsubishi · Payne · Rheem · Ruud · Tempstar · Trane · York .

See the MRCOOL overview, our HVAC installation in South San Francisco, or the South San Francisco service area.

MRCOOL in South San Francisco

Repairs start with a $99 diagnostic, credited toward the fix. Replacing a system? The on-site assessment visit is free. Same-day written findings either way.

Bay Area · 7am–7pm · 7 days · no overtime charges

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