What we do
Six core services for homeowners and small commercial across 65 Bay Area cities. Repairs start with a $99 on-site diagnosis, credited toward the repair, followed by a written estimate before work starts. Installation and replacement assessments are free. We are factory-trained on Daikin and listed on Goodman’s official dealer locator, and service fourteen-plus brands including Carrier, Lennox, Trane, Mitsubishi, and Bosch. New ductless installations use Mitsubishi Electric; Daikin, Goodman and other central-system brands remain options for homes with ductwork.
- AC repair. Same or next-day diagnostic in summer.
- Furnace repair. Combustion safety on every visit.
- Heat pump installation. Factory-trained on Daikin. Rebate paperwork handled.
- Ductless mini-split. Per-zone sizing, not rule of thumb.
- Full HVAC installation. Manual J load calc, every job.
- Maintenance plans. Extends install labor warranty to 10 yr.
For real estate professionals and property managers with portfolio needs, see B2B priority service: same crew and owner-direct contact, with NET-30 invoicing for qualified property management accounts.
Free sizing calculators
Our free sizing calculators provide a preliminary estimate from the home dimensions, climate zone and equipment type you enter. No email or booking is required. Use the result to prepare questions for an assessment; final equipment sizing requires the home's actual conditions and an on-site evaluation.
- Free HVAC Load Calculator. Whole-home Manual J Lite sizing for central AC, furnaces, and ducted heat pumps. CZ3/CZ4/CZ12 design temps built in.
- Free Mini-Split Calculator. Per-zone ductless sizing with multi-head capacity math. Includes Bay Area BAAQMD Rule 9-4 context.
Why people pick us
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 →
Owner-led, owner-accountable. Andrew Kuznetsov signs off on every estimate before it reaches you, and on every job and warranty after. Our trained technicians handle the on-site work, with Andrew's license number on the invoice and his name on the warranty.
Honest diagnostic pricing. $99 to come out, identify the problem, and quote it in writing. Credited toward the repair. We will not invent emergencies; if the answer is “your system is fine, here are the logs, call us next year,” that is what the estimate will say.
Daikin training and manufacturer listings. Andrew completed Daikin factory training in Houston in 2025. Goodman lists us on its official Find a Dealer locator.
10-year parts warranty, plus a labor warranty. On most new installations: 2 years standard, extended to the full 10 years while the equipment stays on our bi-annual maintenance plan; keeping it serviced is what keeps the labor coverage in force.
Andrew runs the technical work; Zlata Velikaia is co-owner and handles scheduling, bookkeeping, documents and finances. We work with a small, consistent crew of four under our insurance and license. Andrew is responsible for the work.
Came out to fix my furnace and I couldn’t be happier with the level of service. Arrived quickly, the technician was friendly, and my problem was fixed in no time. Highly recommend.
Where we work
We cover 65 cities across the Bay Area. Most calls get same-day or next-day response.
- Tri-Valley
- Alamo · Blackhawk · Danville · Dublin · Livermore · Pleasanton · San Ramon
- Diablo Valley
- Clayton · Concord · Lafayette · Martinez · Moraga · Orinda · Pleasant Hill · Walnut Creek
- Inner East Bay
- Alameda · Albany · Berkeley · Castro Valley · El Cerrito · El Sobrante · Emeryville · Fremont · Hayward · Hercules · Milpitas · Newark · Oakland · Piedmont · Pinole · Richmond · Rodeo · San Leandro · San Pablo · Union City
- South Bay & Peninsula
- Atherton · Belmont · Burlingame · Cupertino · Daly City · East Palo Alto · Foster City · Half Moon Bay · Hillsborough · Los Altos · Los Altos Hills · Los Gatos · Menlo Park · Millbrae · Mountain View · Pacifica · Palo Alto · Portola Valley · Redwood City · San Bruno · San Carlos · San Jose · San Mateo · Santa Clara · Saratoga · South San Francisco · Sunnyvale · Woodside
- North Bay
- Benicia · Vallejo
See full service area with city-specific pages, or jump to a tier-1 city: Danville · San Ramon · Alamo · Walnut Creek · Pleasanton · Lafayette · Dublin · Fremont · Berkeley · San Jose · Oakland.
About the work
Through Tech Aid for Refugees, donated household appliances are repaired and delivered to people who need them. For company details, see About Bay Area HVAC Service. Read the Pleasanton Chamber Business Spotlight from May 2026.
Questions homeowners ask us
What warranty comes with a Mitsubishi Electric installation?
What Bay Area cities do you serve?
How much does a diagnostic visit cost?
Are you licensed and insured?
What warranty do you offer on installations?
Do you install heat pumps?
Can you do same-day service?
Do you handle BAAQMD compliance and permits?
What brands do you service and install?
The crew behind the work
Repair or new installation
$99 repair diagnostic.
Free assessment for a new installation.
Installation assessment findings are provided in writing the same day.
Bay Area · 7am–7pm · 7 days · no overtime charges