Mitsubishi in San Mateo
Mitsubishi Electric Diamond Contractor since October 2026. We install Mitsubishi Electric ductless systems and continue to repair and service other mini-split brands.
As a Mitsubishi Electric Diamond Contractor, we register your M-Series or P-Series system for the Mitsubishi Electric 12-year parts and 12-year compressor limited warranty (the HM, WR, HX and WX wall-mounted series top out at 10 years). We register all indoor and outdoor units within 90 days of installation. This coverage applies to a single-family home while the original owner continues to live there and is not transferable. Our standard workmanship warranty is 2 years.
Optional extended labor coverage through JB Warranties is available for up to 12 years under a separate purchased plan. It is not included automatically with the manufacturer warranty.
Financing available on approved credit.
What our Diamond Contractor status means for your home →
Mitsubishi ductless questions: cost per room, noise, the free assessment →
Mitsubishi options for your home
Start with the space you want to heat and cool, or compare equipment layouts.
- System families and ratings
- Controller compatibility
- Replacing a furnace and AC
- Finished garage
- Detached ADU, studio or shed office
- Refinished basement
- Indoor unit styles
- intelli-HEAT with a gas furnace
San Mateo gets more sun than its coastal neighbors once you're past the hills, which means both cooling and heating loads are part of the equation here in a way they aren't in Pacifica or Daly City. The older neighborhoods, Baywood and Hillsdale especially, are full of Craftsman and Spanish-revival homes built before central air was standard, some still on original knob-and-tube wiring, others on original wall heaters. A Mitsubishi multi-zone system adds real cooling and updated heating without cutting ducts into houses that were never built for them.
Downtown is a different problem. The condos and lofts built above the restaurants along B Street have almost no path for ductwork and limited exterior wall access for a condenser, usually a balcony or a shared roof deck with other units. We work those installs around HOA rules on where equipment can sit and how line sets get routed, which takes more planning up front than a single-family backyard job.
We're ADRIUM Service Solutions, owner-operated out of San Ramon, CSLB #1136642 and EPA Section 608 Universal certified. Repair visits start with a $99 diagnostic, credited toward the repair, and a written quote before we touch anything. We work seven days a week. Call (925) 999-4095. Installation assessments are free.
Mitsubishi work we do in San Mateo
Multi-zone retrofits in Baywood and Hillsdale Craftsman homes. These older houses predate central air and often still run original wall or floor heaters. A Mitsubishi multi-zone system, one condenser feeding a head per main room, adds cooling and modern heating without opening walls that weren't built to carry ductwork.
Downtown condo installs with HOA-restricted condenser placement. Condos above the B Street restaurant strip typically have one legal spot for an outdoor unit, a balcony rail or a shared roof area, and HOA rules on what's visible from the street. We plan line set routing and condenser mounting around those restrictions before we quote the job, not after.
Weak airflow from a dirty blower wheel and coil. San Mateo's sunnier microclimate means existing Mitsubishi heads run more hours than the same equipment on the coast, and that shows up as reduced airflow and a musty smell from a dirty blower wheel and coil. We do a full head cleaning and check the condensate path while we're in there.
Factory-trained on Mitsubishi
Mitsubishi in San Mateo: common questions
Is San Mateo within reach, or does the drive from San Ramon add a lot of cost?
Can you install a mini-split in a condo above a restaurant downtown?
Is a Mitsubishi install a problem if my Baywood or Hillsdale home still has knob-and-tube wiring?
What warranty comes with a Mitsubishi Electric installation?
Nearby and related
Mitsubishi near San Mateo: Burlingame · Belmont · Foster City .
Other brands we service in San Mateo: Ameristar · Bosch · Comfort-Aire · Friedrich · LG · Maytag · MRCOOL · Samsung · Amana · American Standard · Bryant · Carrier · Coleman · Cooper & Hunter · Daikin · Ducane · Fujitsu · Goodman · Gree · Heil · Lennox · Payne · Rheem · Ruud · Tempstar · Trane · York .
See the Mitsubishi overview, our HVAC installation in San Mateo, or the San Mateo service area.
Mitsubishi in San Mateo
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