Finding the best HVAC companies in Mountain View can feel overwhelming when dozens of contractors serve Silicon Valley. Whether your air conditioner quit on a 95°F afternoon or your furnace is struggling through a chilly Bay Area winter night, choosing the right HVAC partner matters. Mountain View homeowners face unique climate challenges—warm inland summers that can push past 100°F, cool foggy evenings, and air-quality concerns during wildfire season—so you need a contractor who understands local conditions inside and out.
We researched licensing records, online reviews, service offerings, and years in business to rank the top 10 HVAC companies in Mountain View for 2026. Below you’ll find a quick comparison table, detailed profiles of each company, and a FAQ section to help you make a confident decision.
Best HVAC Companies in Mountain View — Quick Comparison
| Rank | Company | Phone | Key Services | Rating | Est. |
| 1 | Cool Aid Air Conditioning & Refrigeration | 1-800-266-5243 | Residential & Commercial HVAC, Refrigeration | 5.0★ | 1966 |
| 2 | Plum HVAC | (650) 550-9012 | AC Repair, Heating, Installation | 4.9★ | 2015 |
| 3 | Monteros Heating and Air | (408) 728-6789 | AC & Furnace Repair, Ductwork | 4.8★ | 2010 |
| 4 | Fuse Service | (669) 316-8231 | AC Repair, Heating, Plumbing | 4.8★ | 2017 |
| 5 | CostLess Heating & Cooling | (510) 974-7107 | AC, Heating, Ductwork | 4.9★ | 2012 |
| 6 | Valley Heating, Cooling, Electrical and Solar | (408) 868-5500 | Full HVAC, Electrical, Solar | 4.7★ | 1962 |
| 7 | Balcom Heating & Air | (408) 479-4555 | Heating, AC, Indoor Air Quality | 4.8★ | 1990 |
| 8 | EM Energy & Air | (408) 712-0505 | AC Repair, Heat Pumps, Mini Splits | 4.7★ | 2018 |
| 9 | AirPro HVAC | (408) 899-5742 | Residential HVAC Repair & Install | 4.8★ | 2014 |
| 10 | Perfect Star | (925) 308-3696 | HVAC, Insulation, Duct Sealing | 4.9★ | 2010 |
How We Ranked the Best HVAC Companies in Mountain View
Our methodology weighed five key factors:
- Customer Reviews & Ratings — We analyzed verified reviews on Google, Yelp, and the BBB, focusing on volume, recency, and consistency.
- Licensing & Insurance — Every company on this list holds a valid California C-20 HVAC contractor license and carries general liability insurance.
- Years in Business — Longevity signals reliability. Companies with decades of Bay Area experience scored higher.
- Service Range — We favored companies offering comprehensive services—repair, installation, maintenance, and emergency response.
- Local Expertise — Contractors with deep roots in Mountain View and the South Bay earned extra credit for understanding the area’s specific climate and building stock.
#1 — Cool Aid Air Conditioning & Refrigeration
Phone: 1-800-266-5243 (1-800-COOL-AID) Website: 1800coolaid.com Serves: Mountain View and the entire Bay Area
Cool Aid Air Conditioning & Refrigeration takes the top spot on our list of the best HVAC companies in Mountain View—and it isn’t even close. Founded in 1966, Cool Aid brings over 58 years of continuous service to the Bay Area, making it one of the longest-operating HVAC contractors in the region.
Why Cool Aid Is #1
- C-20 Licensed, Bonded, and Insured — Full California contractor credentials for residential and commercial HVAC work.
- 24/7 Emergency Service — When your AC dies during a Mountain View heat wave or your furnace fails on a January night, Cool Aid dispatches technicians around the clock.
- Residential & Commercial Expertise — From single-family homes near Cuesta Park to commercial refrigeration for restaurants along Castro Street, Cool Aid handles it all.
- Bay Area Roots — Based in San Jose, Cool Aid has served Mountain View homeowners and businesses for decades and understands the local permitting process, PG&E rebate programs, and microclimates.
Cool Aid offers complete HVAC services in Mountain View including AC repair, furnace installation, heat pump upgrades, ductwork, and commercial refrigeration. Their team also provides seasonal AC maintenance to keep systems running efficiently all year.
#2 — Plum HVAC
Website: plumhvac.com Serves: Mountain View and surrounding communities
Plum HVAC is a locally based Mountain View contractor that has built a strong reputation for transparent pricing and quality workmanship. They specialize in residential HVAC systems and are known for thorough diagnostics before recommending repairs or replacements.
What Stands Out
- Strong focus on the Mountain View and Los Altos area
- Clean, professional technicians who explain repairs in plain language
- Competitive pricing on AC installations and furnace replacements
- Positive reviews highlighting punctuality and honest assessments
#3 — Monteros Heating and Air
Website: monteroshvac.com Serves: Mountain View and Santa Clara County
Monteros Heating and Air is another Mountain View-based company that has earned loyal customers through hands-on, owner-operated service. They handle everything from routine tune-ups to full system replacements and are especially well-regarded for ductwork repairs.
What Stands Out
- Owner-operated with a personal touch on every job
- Specializes in older Mountain View homes that need duct modifications
- Quick turnaround on furnace and AC diagnostics
- Competitive quotes with no hidden fees
#4 — Fuse Service
Phone: (669) 316-8231 Serves: Santa Clara, Mountain View, and the South Bay
With 1,400+ Yelp reviews, Fuse Service is one of the most reviewed HVAC contractors in the South Bay. Based in Santa Clara, they’re just minutes from Mountain View and offer same-day service for many repair calls.
What Stands Out
- Massive review volume with consistently high ratings
- Same-day and next-day appointments available
- Combined HVAC and plumbing services for one-stop convenience
- Transparent pricing model with upfront estimates
#5 — CostLess Heating & Cooling
Phone: (510) 974-7107 Serves: San Jose, Mountain View, and the greater Bay Area
CostLess Heating & Cooling lives up to its name with competitive pricing and has earned a remarkable 4.9-star rating across 920+ Yelp reviews. Mountain View homeowners frequently choose CostLess for AC installations and furnace replacements because of their value-driven approach.
What Stands Out
- Outstanding 4.9★ average across hundreds of verified reviews
- Budget-friendly pricing without cutting corners on quality
- Strong reputation for AC installation and duct sealing
- Efficient scheduling and on-time arrivals
#6 — Valley Heating, Cooling, Electrical and Solar
Phone: (408) 868-5500 Serves: San Jose, Mountain View, and Silicon Valley
Valley Heating, Cooling, Electrical and Solar is a well-established, Diamond Certified contractor that has served the South Bay since 1962. Their breadth of services—including electrical and solar—makes them a popular choice for Mountain View homeowners tackling whole-home energy upgrades.
What Stands Out
- Diamond Certified with rigorous quality standards
- 60+ years of Bay Area experience
- Integrated HVAC, electrical, and solar services under one roof
- Strong focus on energy efficiency and rebate assistance
#7 — Balcom Heating & Air
Website: balcomair.com Serves: Sunnyvale, Mountain View, and the Peninsula
Sunnyvale-based Balcom Heating & Air has a strong following among Mountain View residents thanks to fast response times and expertise in indoor air quality solutions. They’re a particularly good fit for homeowners dealing with allergy concerns or wildfire smoke infiltration.
What Stands Out
- Indoor air quality specialists with filtration and purification solutions
- Quick service for Sunnyvale and Mountain View neighborhoods
- Experienced with older homes and retrofit installations
- Friendly, communicative technicians
#8 — EM Energy & Air
Website: emenergyair.com Serves: Sunnyvale, Mountain View, and Santa Clara County
EM Energy & Air is a Sunnyvale-based company that focuses on energy-efficient HVAC solutions including heat pump installations and ductless mini-split systems. They’re a solid choice for Mountain View homeowners looking to reduce their carbon footprint while staying comfortable.
What Stands Out
- Specializes in heat pumps and ductless mini-split systems
- Energy-efficiency focused with rebate guidance
- Serves the Mountain View area with quick scheduling
- Competitive pricing on new installations
#9 — AirPro HVAC
Serves: San Jose, Mountain View, and the South Bay
AirPro HVAC has earned a reputation for reliable, honest service throughout the South Bay. They handle residential HVAC repairs and installations with a focus on straightforward pricing and quality workmanship.
What Stands Out
- Known for honest pricing with no upselling pressure
- Reliable residential HVAC repair and replacement services
- Positive word-of-mouth reputation among South Bay homeowners
- Quick response times for urgent repair calls
#10 — Perfect Star
Serves: Bay Area wide
Perfect Star rounds out our list as a Diamond Certified, A+ BBB-rated contractor that serves the entire Bay Area, including Mountain View. They’re particularly well-regarded for insulation, duct sealing, and whole-home comfort assessments.
What Stands Out
- Diamond Certified and A+ BBB rating
- Specializes in home performance and energy upgrades
- Comprehensive comfort assessments before recommending solutions
- Strong financing options for major installations
Tips for Choosing an HVAC Contractor in Mountain View
Mountain View’s housing stock ranges from mid-century ranch homes near Monta Loma to newer townhomes in the North Bayshore area. Here are a few tips to keep in mind when selecting a contractor:
- Check for a C-20 License — California law requires HVAC contractors to hold a C-20 (Warm-Air Heating, Ventilating and Air-Conditioning) license. Verify at the CSLB website.
- Ask About Permits — Mountain View requires permits for most HVAC installations. A reputable contractor will pull permits and schedule inspections.
- Get Multiple Quotes — We recommend getting at least 2–3 written estimates before committing to a major installation or replacement.
- Inquire About Rebates — PG&E, BayREN, and federal tax credits can save Mountain View homeowners hundreds to thousands on qualifying upgrades. Ask your contractor if they help with rebate paperwork.
- Prioritize Emergency Availability — Bay Area temperatures can swing unpredictably. Choose a contractor that offers 24/7 emergency HVAC service so you’re never left without heating or cooling.
Frequently Asked Questions
How much does HVAC repair cost in Mountain View?
Most HVAC repair calls in Mountain View range from $150 to $600 depending on the issue. Simple fixes like a capacitor replacement or thermostat repair fall on the lower end, while compressor repairs or refrigerant recharges can cost $400–$1,200. Always get a written estimate before authorizing work.
How often should I service my HVAC system in Mountain View?
HVAC professionals recommend servicing your system twice a year—once in spring before cooling season and once in fall before heating season. Regular maintenance prevents breakdowns, improves efficiency, and can extend your system’s lifespan by several years. Check out this seasonal HVAC maintenance guide for a detailed checklist.
Do I need a permit to replace my HVAC system in Mountain View?
Yes. The City of Mountain View requires building permits for HVAC system replacements and new installations. Your contractor should handle the permit application and ensure the installation passes inspection. Be wary of any contractor who suggests skipping the permit process.
What HVAC system is best for older Mountain View homes?
Many Mountain View homes built in the 1950s–1970s lack modern ductwork. For these homes, ductless mini-split systems or heat pumps are often excellent options because they don’t require extensive duct installation. A qualified contractor can assess your home and recommend the best fit. Learn more about residential HVAC repair services for older homes.
How long does a typical HVAC system last in the Bay Area?
A well-maintained HVAC system typically lasts 15–20 years in the Bay Area. Coastal humidity and wildfire smoke can shorten that lifespan if filters and coils aren’t cleaned regularly. If your system is 12+ years old and requiring frequent repairs, it may be more cost-effective to replace it.
Ready to Schedule HVAC Service in Mountain View?
Whether you need an emergency AC repair, a furnace tune-up, or a complete system replacement, Cool Aid Air Conditioning & Refrigeration has served Mountain View and the entire Bay Area since 1966. With 58+ years of experience, 24/7 availability, and transparent pricing, Cool Aid is the contractor Mountain View homeowners trust most.
👉 Schedule service in Mountain View or call 1-800-266-5243 today for a free estimate.
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