How much does AC repair cost in San Mateo?

AC repair in the San Mateo area typically costs $150–$650 depending on the issue. Common fixes like refrigerant recharge run $200–$400, while compressor replacement can be $800–$2,000. We provide upfront pricing before any work begins.

How quickly can you come for an AC emergency?

We offer same-day and emergency AC repair across San Mateo, CA. During peak summer months, our typical response time is 2–4 hours for emergency calls in the San Mateo metro area.

How much does a new AC cost in San Mateo?

A new central AC system in the San Mateo area typically costs $4,500–$15,000 installed, depending on home size, efficiency rating, and brand. Heat pump systems eligible for SMUD rebates can reduce your out-of-pocket cost by $1,500–$3,000.

What SMUD rebates are available for AC replacement?

SMUD currently offers up to $3,000 in rebates for qualifying heat pump installations. Additional federal tax credits of up to $2,000 may also apply for high-efficiency systems. We handle all rebate paperwork for you.

Are heat pumps worth it in San Mateo?

Heat pumps are excellent for San Mateo's climate. They provide efficient cooling in summer and heating in winter, and with SMUD rebates up to $3,000 plus federal tax credits up to $2,000, the payback period is typically 5–8 years.

How much do heat pumps save on energy bills?

Heat pumps can reduce heating costs by 30–50% compared to gas furnaces and cooling costs by 20–30% compared to standard AC units. SMUD customers see average annual savings of $400–$800.

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HVACSan Mateo, CAUnclaimed

United HVAC/Duct Cleaning

5★★★★★(29 Google reviews)

41NorCal Score· Standard

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Business Information

Address: 146 N Fremont St, San Mateo, CA 94401, USAGet Directions
Phone: (855) 228-6182
Website: united-airductcleaning.com/
Trade: HVAC
License: C-20 (Warm-Air Heating, Ventilating and Air-Conditioning)
Area: San Mateo, CA

Business Hours

Mon	7:00 AM – 8:00 PM
Tue	7:00 AM – 8:00 PM
Wed(Today)	7:00 AM – 8:00 PM
Thu	7:00 AM – 8:00 PM
Fri	7:00 AM – 8:00 PM
Sat	Closed
Sun	7:00 AM – 8:00 PM

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Reviews

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3 Google

★★★★★Romulo Tapara year agovia Google

Today, I got an outstanding dryer vent cleaning service from this company. The technician who cleaned my dryer vent was super professional and truly committed to his work. He arrived early and had everything needed for the job. I’m beyond satisfied with his work and will definitely use this company again in the future. Thanks a lot!

★★★★★Jerald Macabulita year agovia Google

I had a great experience with this company for my air duct cleaning service today. The technician arrived right on time, walked me through the process, and got to work immediately. The air in my home already feels lighter. Very professional team—no hidden fees, just honest, quality work.

★★★★★sjoros. com9 months agovia Google

I had this company come out for a residential air duct cleaning service because our home started smelling dusty every time the AC ran. The technician was polite and careful with our furniture. The air feels noticeably cleaner now. I’m very happy with the results!

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About United HVAC/Duct Cleaning

United HVAC/Duct Cleaning consistently earns praise for punctual, professional technicians who arrive prepared and get straight to work. Customers specifically highlight noticeable improvements in air quality after duct cleaning services, careful handling of their homes and furniture, and transparent pricing with no hidden fees. The company's commitment to thorough, honest work has left clients highly satisfied and eager to use their services again. Contact them directly or request a free quote through NorCal Repairs.

AI Summary — Updated July 2026

HVAC Services in San Mateo

AC Repair$150–$65024/7 Emergency AC Replacement$4,500–$15,000 Heat Pump Installation$6,000–$18,000 Furnace Repair$125–$50024/7 Emergency Furnace Replacement$3,500–$10,000 HVAC Maintenance$89–$199 Ductwork Services$300–$5,000 Mini-Split Installation$3,000–$8,000 Thermostat Installation$150–$500 Indoor Air Quality$200–$3,000

Service Area

United HVAC/Duct Cleaning serves San Mateo and the surrounding areas:

San Mateo Redwood City Daly City South San Francisco Foster City San Bruno Burlingame

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