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From $50
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Closed until Mon, 7:30 AM
At Bayside Mechanical Inc. in Foster City, we specialize in comprehensive HVAC services that keep your home comfortable all year round. We're more…
The Best HVAC Company in Foster City
Compare top-rated hvac providers in Foster City. Profiles include verified reviews, service details, and direct contact options.
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Grimes Certified Air Duct Cleaning
Open today
From $50
Up to $500
Open 7:00 AM – 8:00 PM
In Foster City, we are Grimes Certified Air Duct Cleaning, experts in HVAC services. We specialize in thorough air duct cleanings and comprehensiv…
From $50
Up to $500
Closed until Sat, 9:00 AM
In the heart of Foster City, we're Air Conditioning Champ – your reliable HVAC partner. Specializing in HVAC services, our mission is to ensure ho…
From $50
Up to $500
Closed until Mon, 6:00 AM
At Foster City's Silicon Valley Air Systems, Inc, we understand that a malfunctioning HVAC system can disrupt your home's comfort. We are more tha…
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What to know about HVAC
Four Rules How to Choose the Right Contractor
Hiring an HVAC professional is a decision about your budget, your comfort, and sometimes your safety — so it deserves more than an impulse phone call. This is the short version of how we'd approach it, and the exact criteria embedded in every GigoPro profile.
Start with ratings and recent reviews
Ratings tell you the average; recent reviews tell you the truth about right now. Read the last handful of reviews for a company, not just the stars. A contractor who fixes the reported problem, explains what was done, and leaves the site clean is the one you can trust with a multi-thousand-dollar decision.
Compare services, service area, and response time
Confirm the company actually performs your specific job — a residential AC repair shop is not automatically a commercial rooftop specialist, and vice versa. Check that your address is inside its service area, and look for stated response times if your situation is urgent.
Get at least two written estimates
Reputable pros will inspect, then give a written, itemized estimate — clearly stating labor, parts, and any permit costs. Price differences between honest quotes reflect equipment brands, warranty terms, and installation quality, so never choose on the bottom line alone. Ask what each quote includes and what it excludes.
Verify credentials for your trade
Licensing and insurance requirements differ from state to state and shift over time. In regulated jurisdictions, ask for the company's license number and proof of insurance before work begins — never after. Professional companies expect these questions and answer them without hesitation.
Questions to ask before booking
- How long have you been working in my area, and are you licensed and insured for this job?
- Will I receive a written, itemized estimate before any work starts?
- Do you guarantee parts and labor, and for how long?
- How is emergency or after-hours service charged?
- How long will the job take, and who do I contact during the work?
- Can you share a reference from a similar job in the last six months?
Red flags to walk away from
- Vague pricing that changes once work begins, or pressure to sign today.
- Refusal to put the estimate in writing.
- A "free" check-up that always concludes with a full-system replacement.
- Requests for full payment upfront before any work is performed.
Your One-Stop Hub for HVAC Services Across the Country
Whether your air conditioner stopped on the hottest day of the year, your furnace is cycling on and off in January, or you are planning a full system replacement for your home or business — this page is your starting point. GigoPro's hub gathers verified heating, ventilation, and air conditioning contractors from cities across the United States in one place, so you can stop calling around and start comparing on facts.
Every company you find here lists what it actually does: air conditioning repair and installation, furnaces and heat pumps, ductwork and ventilation, indoor air quality, commercial HVAC maintenance, and emergency call-outs. Each profile shows the services offered, the area the company serves, recent customer reviews with ratings, and contact details — so you can shortlist three or four pros, request written estimates, and book the one that fits you best.
Quality on Gigo is not self-declared. Before any business appears in search results, we moderate the profile: we verify that the company is real, actively operating, and actually operates in the category it claims; for regulated trades, we verify proper credentials. Listings that stop being active are hidden automatically. That is what "verified near you" should mean, and it is why tens of thousands of homeowners 100 000 start their search here every month.
Pick your city below to see local providers, ratings, and current availability — or read on to learn about the services, get a simple contractor-hiring checklist, and find out what to expect before you book.
Services You Can Find on Gigo
The contractors in this directory cover every part of that equation, from a quick fix to a full replacement. Here is what each type of service involves, and when you are likely to need it.
Air Conditioning Repair & Installation
Central AC repair covers everything from a tripped breaker and a refrigerant leak to a failing compressor or a blower motor that needs replacing. If your system is older than 12–15 years [verify & localize], or repairs keep adding up, a new installation — including ducted central systems and ductless mini-splits — can be the smarter long-term call. Companies listed here service AC units of every age and brand, so a technician visit starts with a proper diagnosis, not a sales pitch.
Heating & Furnace Services
Furnaces, boilers, and space heaters keep your home livable through winter. Typical jobs: no-heat emergencies, noisy operation, pilot and ignition problems, carbon-monoxide safety checks, and full furnace replacement. Annual pre-winter maintenance is the cheapest insurance you can buy against a breakdown in freezing weather. If your heat stops working, prioritize companies that list emergency or same-day response in their profile.
Heat Pumps
Heat pumps heat and cool from the same efficient unit — air-source systems are the most common, with ground-source (geothermal) options for larger projects. Contractors in this category install, repair, and replace heat pumps, size them correctly for your home, and handle the ductwork modifications that a switch from a furnace often requires. If you are replacing an aging system, a heat pump conversion is worth having with two or three licensed pros before you decide.
Ductwork & Ventilation
Your ducts carry every degree of comfort to every room. Duct cleaning removes dust and debris that builds up over years; duct sealing stops the leaks that let conditioned air escape into attics and crawl spaces; and duct repair or replacement fixes crushed, disconnected, or rodent-damaged runs. If rooms in your house never quite reach the set temperature, airflow problems are often the culprit — worth checking before you blame the system itself.
Indoor Air Quality
Modern HVAC work goes beyond temperature. Air purifiers, whole-home filtration, humidifiers and dehumidifiers, ventilation and fresh-air systems, and UV treatments all change what you breathe. Companies offering indoor air quality services can test and improve air in homes with allergies, asthma, new paint or renovation dust, or simply poor circulation.
Commercial & Multi-Unit HVAC
Offices, restaurants, retail spaces, and apartment buildings have very different needs than homes — rooftop units, package systems, and scheduled maintenance contracts that keep tenants comfortable and equipment warranties valid. The directory includes commercial HVAC contractors who can respond quickly when a business space loses heat or cooling, and who will quote preventative maintenance to avoid the midnight call-out later.
Maintenance & Seasonal Tune-Ups
A spring tune-up before cooling season and a fall check-up before heating season catch small problems while they are still cheap to fix. Maintenance typically covers filter replacement, cleaning coils and burners, checking refrigerant charge, testing safety controls, and confirming airflow. Many companies publish maintenance plans in their profiles — compare what is included (and what an emergency visit costs) before you commit.
24/7 Emergency Service
Systems break on weekends and holidays. Emergency-ready contractors keep after-hours teams for exactly the no-heat, no-cool, or gas-odor situations that can't wait until Monday. Check a company's profile for stated emergency availability and response policy before needing it — that is far easier than cold-calling on a Christmas morning.
Find Pros in Your City
GigoPro lists providers in 10171 cities across all 50 states. Each city page shows local air conditioning, heating, and ventilation companies with their ratings, recent reviews, service areas, and contact details — so you see exactly who operates near you before you call. Listings are moderated at signup and reviewed continuously; businesses that stop operating are removed, and new cities are added regularly.
Verified HVAC in Foster City, CA
We show only active businesses that pass moderation. Results are specific to Foster City and nearby service areas, and inactive profiles are removed to keep the list current.
Real reviews for hvac
Ratings and reviews come from customers who used the service. Compare hvac pros in Foster City by experience, responsiveness, and value before you reach out.
Local-first search in Foster City
Filter by neighborhood, check locations on the map, and find providers close to home or work in Foster City. Listings are refreshed regularly — August 2026.
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HVAC by city
Find verified hvac providers in cities across the United States. Each city page lists active businesses with reviews, contact details, and current offers. Showing the most active cities — type a city name in the filter to jump elsewhere.
Frequently asked questions
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Is GigoPro free to use?
Yes. Browsing businesses, reading reviews, and comparing providers is free for everyone. Business owners can create a basic listing at no cost.
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How do you verify businesses?
Every profile goes through moderation before it appears in search. We check that the business is real, active, and matches the category it claims. Inactive listings are hidden automatically.
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How do I choose the right pro?
Start with ratings and recent reviews, then compare services offered, location, and response time. Contact two or three providers to get quotes before making a decision.
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Can I list my business on GigoPro?
Yes. Create a free business profile to reach local customers searching for your category. You can update services, photos, and contact details anytime.
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How often is information updated?
Business owners update their own profiles. Our team also refreshes hub pages and removes inactive listings so search results stay current.
What locals say about HVAC in Foster City
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the technicians helped with a small commercial install and kept the process calm and organized. they coordinated access with our manager, protected the work area, and kept tools contained so our staff could keep moving. they explained the plan, then completed the installation and testing in a way that felt careful. i appreciated the clear estimate and the simple closeout notes. they also verified the unit was calbrated correctly and that the settings matched our operating hours. cleanup was complete and they hauled away packaging and old materials. the follow-up email included model numbers and a service schedule, which helps for our records. overall it was a steady, professional experience and the space has been comfortable since.
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I used Air Conditioning Champ for a small commercial suite where the air felt uneven between rooms, and they approached it like a real diagnostic job instead of a quick patch. The crew checked the registers, measured temps, and looked over the control wiring before suggesting changes. They explained why teh back office was staying warmer and proposed a couple of solutions with prices up front. What stood out was the pace: they didn’t drag it out, but they also didn’t skip steps. After the work, they tested each zone, verified the fan settings, and made sure the noise level stayed reasonable. Cleanup was handled well, no dust piles or loose tape left behind. The office manager appreciated the clear invoice and the way they coordinated access around our client appointments. We also got a follow-up email with maintenance reminders and a contact line for any questions. Everything felt handled with care and consistency.
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The technicians handled a cooling issue that had been bothering us for weeks, and the process felt well thought out. They listened to the symptoms first, then checked the outdoor unit and the indoor coil rather than jumping straight to a replacement pitch. When they found the likely cause, they explained what it meant and how it affects performance, including what happens when refrigerant is low and why that can show up as longer run times. The estimate was written clearly with labor and parts separated, and they didn’t rush me while I reviewed it. During the work, they covered the floor, moved equipment carefully, and kept the noise down as much as possible. Afterward, they tested the system, confirmed the temperature drop across the unit, and had me stand with them while it stabilized. they also answer my questions and was patient even when i repeat things, and the office person call back quick which help alot. Overall, the repair felt thorough and the house has been comfortable since.
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The reception is mad all the time this is not a good attitude for Someone who’s doing business with others
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"we're booked" They had no interest in helping me.
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Excellent Heating & Air Conditioning company in San Francisco Ca. The only professional Heating & Air Conditioning company that is a one stop shop. From Mechanical design to installation and repair they do it all. There owner is a Mechanical Engineer who is top in his field.
