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Find Furnace / forced air heating system install or replace pros in Union City

Avatar for DUKES HEATING & AIR CONDITIONING
DUKES HEATING & AIR CONDITIONING
4.8(
135
)

Serving Union City, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Great. They contacted me right away. It wasn't an emergency but Iti was cold, so they still came first thing on the first business day. The technician explained what he was doing and why the prior repair done by somebody else probably failed. The rate was reasonable. It's been a couple of days and it seems the furnace is working, so everything good so far."
Heat Pump Repairs & Installations
Central Air Cut-Ins
Electric Furnace Repairs & Installations
Response time4 days
34 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Comfort Energy Inc
Comfort Energy Inc
4.6(
120
)

Serving Union City, CA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"We purchased the $49.99 service call. It was very easy to schedule, and we had someone out within a couple of days. The gentleman who came out was very professional and communicated everything that he was doing and finding. At the end, he provided several options for our furnace. One was to just replace the part that was causing our immediate problem; however, our furnace was 27 years old and there were signs that a couple of other key parts were on their last legs. The other options were to replace the furnace with different types of furnaces. I wasn't comfortable making the call on what we would do at the end of the service call and that was fine. There was no hard sell to make an option then and there. I really appreciated that.
After discussing it, my husband and I decided to replace the furnace with one of the options provided. We called the next day and they sent a couple of folks to replace it within a few days. The two gentleman were professional and thorough, and cleaned up everything before they left. They installed our Nest thermometer rather than the thermometer that came with the furnace, and everything has been working great.


"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+12

Response time1 day
61 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Global Comfort Heating and Air
Global Comfort Heating and Air
4.8(
52
)

Serving Union City, CA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Global Comfort installed a full HVAC system in my home; 7 new runs for air, new AC unit, new furnace and a new Nest thermostat, all electrical needs. Rudy and his team are respectful, efficient, punctual, competitive in pricing. Rudy walked me through running the system for its first time and explained all the stuff for a brand new system in a house that never had AC. I'm very thankful for the work they did. Highly recommend because their customer service is top notch."
Team Global Comfort Truck
Carrier Heater Changeout
Duct Install securing runs
Duct Install securing runs
Carrier 95% Installation

+9

Response time50 mins
Response rate94%
4 neighbors recently requested a quote
Avatar for Aire Serv of Campbell & Saratoga
Aire Serv of Campbell & Saratoga
4.9(
21
)

Serving Union City, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1991

Free estimates

Emergency services offered

"I recently had a new HVAC system installed by Aireserv, and I couldn't be more pleased with the results. From the beginning, the team was professional, courteous, and informative. They arrived on time and were very thorough in explaining the detailed installation plan, the features of the new system, and how to operate it. The installation went smoothly, and the technicians cleaned the area while working. Once the system was installed, they ran tests to ensure everything was working perfectly and took the time to answer all of my questions. The new HVAC system has been a game-changer in terms of performance. It heats and cools my home more efficiently than my previous unit, and I've noticed a significant improvement in comfort and air quality. The system runs quietly and maintains an even temperature throughout my home. I also appreciate the energy savings I'm already seeing. My energy bills have been noticeably lower, which I can directly attribute to the new system's efficiency. Overall, I'm delighted with the service from Aireserv and the performance of the HVAC system. I highly recommend them to anyone in need of HVAC installation or upgrades. They provided excellent service from start to finish! A BIG THANK YOU TO ALTON THOMPSON AND HIS TEAM FROM AIRESERV."
Furnace install
Heat Pump - Condo Install
Heating & A/C Project
Water Heater Replacement
System Swap Out

+58

113 neighbors recently requested a quote
Recommended by57%of homeowners
Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.4(
717
)

Serving Union City, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"Jaleen from Albert Nahmans is top notch , diagnosed the issue with an old furnace , fixed it and made recommendations for repairs and or replacement . A huge thank you!!"
Living room Mini-Split
Aquasana home Filtration
Almost no disturbance at EBMUD meter
Navien with filtration to protect the heat exchanger
New house valve and Pressure Reducing Valve

+73

Response time8 hrs
Response rate99%
53 neighbors recently requested a quote
Avatar for Rittinger Heating and Air
Rittinger Heating and Air
5.0(
17
)

Serving Union City, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Rittinger responded quickly. Alan, the tradesman they sent over was professional and quick. I hired them to install a clothes dryer vent and to open up a vent in my garage for the hot water heater. The work was high quality and installation was clean."
Service maintenance
Service maintenance
Service maintenance
Service maintenance
Service maintenance

+2

25 neighbors recently requested a quote
Avatar for Gosal Heating and Air Conditioning
Gosal Heating and Air Conditioning
4.3(
77
)

Serving Union City, CA and surrounding areas

Approved

In business since 2007

Free estimates

Warranties offered

"Project: Install a Central Air Conditioning System The project was top notch. Not only did they consistently show up on time, but they finished the project early and were willing to reschedule the final walkthrough multiple times to accommodate our city inspection. Final project turned out great!""
Installation
Installation
Response time10 hrs
13 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Air Sharks
Air Sharks
5.0(
12
)

Serving Union City, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Emergency services offered

"I was extremely impressed with the service provided by Air Sharks, who replaced my aging furnace and damaged heat ducts. Elizabeth provided a detailed explanation in a friendly, professional and understandable way. Pricing seemed reasonable, and was 25% below a previous estimate. Daniel and his crew did a fantastic job removing and replacing the new furnace and the duct system in a very tight crawl space. They left the furnace looking absolutely beautiful and clean. I highly recommend them"
Daikin Heat Pump Install
Daikin Heat pump Install and Duct Work
Before picture.
BEFORE
Daikin Heat Pump Install

+22

Response time1 day
Response rate99%
34 neighbors recently requested a quote
Avatar for Comfort Energy, Inc.
Comfort Energy, Inc.
4.3(
251
)

Serving Union City, CA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"They replaced our failed furnace with the same model, efficiently and at a very affordable price. The installer Bob did and outstanding job, and the QC checker Mizael did a thorough follow-up check of the installation and checked each of the furnace vents for adequate heat. The new furnace very quickly heats our home and is the right size for our home square footage. The Comfort Energy company not only gave us the best price, but is also furnishing two complimentary follow-up maintenance checks. This company deserves a 5 star rating."
COMFORT ENERGY AWARDS
Our Comfort Energy Team
COMFORT ENERGY AWARDS
Best of Milpitas 7 Years in a Row! 2015 - 2022
Angie's List A Rating

+27

Response time11 hrs
179 neighbors recently requested a quote
Recommended by93%of homeowners
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FAQs for furnace / forced air heating system install or replace projects in Union City, CA

Converting from an oil furnace to an electric furnace isn't a simple swap—the oil system needs to be completely removed before installing the electric furnace. You'll need a full electric system installation, but you might be able to reuse existing ductwork if it's up to current safety standards. You’ll need to budget for a new electric furnace installation, which costs between $1,800 and $6,200, including professional removal, proper disposal, and safe installation of the new system.

Electric furnaces are 100% efficient at converting electricity into heat. However, some of that heat can be lost as it travels through your home's ductwork or escapes through poorly insulated areas. That's why regular duct maintenance and proper home insulation are important to maximize your furnace's efficiency and reduce heat loss, ensuring consistent warmth and lower energy costs.

With proper maintenance, an electric furnace can last anywhere from 20 to 30 years, outlasting the average gas furnace's lifespan of 15 to 20 years. To keep your electric furnace running efficiently, schedule regular cleanings, tighten connections, and have inspections done before winter arrives. With routine maintenance, you’ll ensure consistent, safe heating for years to come.

The size of the electric furnace you need depends on factors like your home's square footage, climate, and insulation quality. As a general guideline, those who live in warmer climates should multiply their square footage by 30 to 35 BTUs, while those in cooler areas should multiply it by 50 to 60 BTUs.

Consulting with an HVAC professional can help you determine the exact size that's right for your home.

An electric furnace works by converting electricity into heat using high-resistance heating elements. A blower then pushes the warm air through your home's ductwork, distributing heat evenly throughout your space. Since there's no combustion involved, electric furnaces eliminate the risks associated with gas furnaces and provide consistent, reliable heating when properly installed.

An electric furnace uses between 40 and 80 kilowatts per day to heat your home. The exact amount it uses depends on factors like your home's size, insulation, and overall energy requirements. Larger homes or those with poor insulation use more energy than smaller, well-insulated spaces. A professional furnace assessment can help confirm the ideal unit size for your needs.

The Union City, CA homeowners’ guide to furnace / forced air heating system installs or replaces

From average costs to expert advice, get all the answers you need to get your job done.