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Giant HVAC, Inc

Fremont HVAC Companies
Ranked #8 in Fremont | Grade B-
4.90 (61 reviews)

Giant HVAC, Inc

Local HVAC company serving Fremont with system replacements, AC and mini-split additions, and duct upgrades. Known for timely communication, clear options, and clean installations.

Why Homeowners Choose This Business

Clear, responsive communication from first call to final walkthrough. Options explained with straightforward pricing and scheduling that respects your time. Install teams arrive prepared, work efficiently, and leave work areas clean.

Service Area

Headquartered in Fremont and serving surrounding East Bay communities in the Tri-City area.


How This Business Compares

A quick local comparison based on review strength, business detail, and local service fit.
  • Shows strong customer satisfaction signals based on review quality and volume.

Services Covered

  Renovation Services
  HVAC installation
  Installations
  Furnace Replacement
  Repairs
  Air Conditioner Installation
  Mini-split systems
  Ductwork Replacement
  Heat pump installation
  Whole-house fan
  HVAC repair
  Duct Sealing
  Thermostat Installation
  Ventilation upgrades
  Indoor Comfort Solutions

Heating and cooling system installation and replacement; furnace change-outs; air conditioner and heat pump installs; ductwork replacement and sealing; split and mini-split AC additions; ventilation and whole-house fan installs; maintenance and troubleshooting.


Reviews

Recent Reviews

4.90

(Based on 61 reviews)

Reviews consistently highlight clear communication by phone and text, with quick scheduling for both installs and service visits. Many customers mention punctual crews, efficient workmanship, and tidy job sites. Homeowners appreciate being given options for replacements or add-ons like mini-splits and whole-house fans. Pricing is often described as reasonable and well explained.

Google Review
Gene Hertel on Giant HVAC, Inc

Had the heater replaced as well as replacing the ducts. Joe and his team did a fine job and the new system is keeping the house warm. We're also looking forward to the AC in the summer for the first time.

Google Review
Sophia Tian on Giant HVAC, Inc

Called for helping remove old furnace. Great communication over the phone and text. The crew come in the next morning and finished in an hour. Reasonable price. Very friendly owner and crew members. Recommend!!

Google Review
Pola Alas on Giant HVAC, Inc

Thanks Joe and Team!
We recently had a whole house fan installed along with a split AC unit for each half of our home, and we could not be happier with the results! From start to finish, the service was absolutely exceptional. Communication was clear, timely, and professional, every question we had was answered in detail, and we always felt informed about the process.

The installation team arrived right on time, worked efficiently, and left everything spotless when they were done. The whole house fan has been a game changer for quickly cooling the house in the evenings, while the split AC units keep each side of the home perfectly comfortable no matter the temperature outside.

If you’re looking for top-quality equipment combined with outstanding service and installation, I can’t recommend them enough. This was truly a 5-star experience from start to finish!

Google Review
brandt frankie on Giant HVAC, Inc

Joe and his crew were great. He gave me several good options for my HVAC replacement, even one that allowed me to keep my current gas furnace. Joe was on time and responsive. He answers all my questions no matter how trivial. I will likely have more work done with him the future.

Huge thanks to Joe for coming to the rescue with our HVAC! Super friendly and down-to-earth, he explained what was wrong and sorted it out quickly. The house is finally comfortable again, and we're so grateful. Working with Joe was a breeze - he's efficient, reliable, and just awesome. So thankful for the help!

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Frequently Asked Questions

Common projects include furnace replacements, AC and mini-split installations, and ductwork upgrades. The team also helps with whole-house fans, ventilation improvements, and troubleshooting comfort issues.

Yes. Customers often receive multiple options with pros and cons so they can choose based on budget, comfort, and efficiency goals. The technician will explain what to expect for installation and timelines.

Availability varies, but reviews frequently note next-day or prompt scheduling for assessments and smaller tasks. Call the office for current openings and to confirm lead times for larger installs.

Yes, duct replacements and improvements are a regular part of projects. The team can assess existing ducts, recommend right-sizing or sealing, and install new runs to improve comfort.

Crews typically arrive on time, review the plan, and protect work areas before starting. After installation, the system is tested, settings are reviewed with you, and the site is cleaned up.
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Opening Hours


  • Monday 8:00 AM – 5:00 PM
  • Tuesday 8:00 AM – 5:00 PM
  • Wednesday 8:00 AM – 5:00 PM
  • Thursday 8:00 AM – 5:00 PM
  • Friday 8:00 AM – 5:00 PM
  • Saturday 9:00 AM – 1:00 PM
  • Sunday Closed

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Business Details


Business Rating
4.90 (61 reviews) FeaturedPro Business
Address
43012 Christy St, Fremont, CA 94538
Phone
Business Type
general_contractor

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