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TRUSTED BY UNION CITY, CA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon265
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Union City

Vivianos Painting

5.00(
4
)
Approved Pro

Vivianos Painting

5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
164 local quotes requested

Vivianos Painting provides painting services in Oakland, CA, and the area. You can call for different painting, plumbing, and other services. I will be glad to help you! Residential Handyman Service, Painting Service, Plumbing Service, Small Siding Repair, Exterior Painting Piedmont CA; Albany CA; Orinda CA; Pinole CA; Moraga Town CA; Interior Painter, Painting Specialist, Immaculate Painting, Affordable Painting Contractors, Quality Painting Services http://vivianospainting.com/

"It was excellent. They were responsive and quick. I liked the quality overall."

Darryl G on March 2023

Vivianos Painting provides painting services in Oakland, CA, and the area. You can call for different painting, plumbing, and other services. I will be glad to help you! Residential Handyman Service, Painting Service, Plumbing Service, Small Siding Repair, Exterior Painting Piedmont CA; Albany CA; Orinda CA; Pinole CA; Moraga Town CA; Interior Painter, Painting Specialist, Immaculate Painting, Affordable Painting Contractors, Quality Painting Services http://vivianospainting.com/

"It was excellent. They were responsive and quick. I liked the quality overall."

Darryl G on March 2023


Avatar for Ease HVAC

Ease HVAC

4.83(
23
)
Approved Pro

Ease HVAC

4.83(
23
)
Approved Pro
Customers say: Quick response
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
16 years of experience

We are a small business with low overhead so we can pass the savings on to our homeowners. We work diligently to complete all service calls by offering evening hours throughout the week to fit your scheduling needs. With our many years of experience, you can feel comfortable that your heating and air needs are in good hands. Call us today to get your estimate on your next project!

"Amr was most professional & knowledgeable. He should be rewarded financially & considered to become a CEO for your company! He'd be excellent because he has started from the bottom. He has earned his way to the top! Millicent Mc Cormack 81 David Drive Moraga, CA 94556"

Millicent M on January 2021

We are a small business with low overhead so we can pass the savings on to our homeowners. We work diligently to complete all service calls by offering evening hours throughout the week to fit your scheduling needs. With our many years of experience, you can feel comfortable that your heating and air needs are in good hands. Call us today to get your estimate on your next project!

"Amr was most professional & knowledgeable. He should be rewarded financially & considered to become a CEO for your company! He'd be excellent because he has started from the bottom. He has earned his way to the top! Millicent Mc Cormack 81 David Drive Moraga, CA 94556"

Millicent M on January 2021


Avatar for Global Comfort Heating and Air

Global Comfort Heating and Air

4.85(
47
)
Approved Pro

Global Comfort Heating and Air

4.85(
47
)
Approved Pro
Customers say: Quality work
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
16 years of experience

We are a family owned full service heating and air conditioning company. We pride ourselves on delivering professional service to our clients. We are experts in all areas of heating and cooling installation and repair. There is no job to big or to small so please give us a call!

"We chose repair of a very old air conditioning unit due to the cost of a new unit. It is working now but we have no guarantee of for how long. Global responded quickly and repaired the unit within hours."

Wayne B on July 2025

We are a family owned full service heating and air conditioning company. We pride ourselves on delivering professional service to our clients. We are experts in all areas of heating and cooling installation and repair. There is no job to big or to small so please give us a call!

"We chose repair of a very old air conditioning unit due to the cost of a new unit. It is working now but we have no guarantee of for how long. Global responded quickly and repaired the unit within hours."

Wayne B on July 2025


Avatar for AireServ of Pleasanton

AireServ of Pleasanton

4.67(
3
)
Approved Pro

AireServ of Pleasanton

4.67(
3
)
Approved Pro
33 years of experience
Free onsite estimate

AireServ of Pleasanton is a locally/owner run and operated company. We service all of East Bay Area. We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. AireServ has been around for over 20-years with over 250 locations.

AireServ of Pleasanton is a locally/owner run and operated company. We service all of East Bay Area. We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business. AireServ has been around for over 20-years with over 250 locations.


Avatar for Bell Brothers Plumbing Heating & Air

Bell Brothers Plumbing Heating & Air

4.66(
387
)
Approved Pro

Bell Brothers Plumbing Heating & Air

4.66(
387
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
57 local quotes requested

We are locally owned and operated, and serving the Bay Area. Our focus is residential air conditioning, heating, Installation of HVAC systems and full-service plumbing. We love working with homeowners and helping to take care of their precious homes. We also keep busy doing light commercial service. Serving California since 1954, financing options available, We don't charge extra for Saturday service calls.

"Called this company for their $77 dollar, which they advertised with a flyer, for a tune-up and cleaning for my heating system. They are a Hayward company and I was told that our Castro Valley home was not in their service area. I bet if I called to buy a new heater they would be out in a day."

Gregory O on March 2023

We are locally owned and operated, and serving the Bay Area. Our focus is residential air conditioning, heating, Installation of HVAC systems and full-service plumbing. We love working with homeowners and helping to take care of their precious homes. We also keep busy doing light commercial service. Serving California since 1954, financing options available, We don't charge extra for Saturday service calls.

"Called this company for their $77 dollar, which they advertised with a flyer, for a tune-up and cleaning for my heating system. They are a Hayward company and I was told that our Castro Valley home was not in their service area. I bet if I called to buy a new heater they would be out in a day."

Gregory O on March 2023


Avatar for Alex's Handyman Services

Alex's Handyman Services

5.00(
6
)
Approved Pro

Alex's Handyman Services

5.00(
6
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
120 local quotes requested

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

"Very good, the job was completed very quickly"

Jeremy B on April 2025

Our mission is to be a provider that brings back the personal touch with our customers. We will build a relationship that will last a lifetime after you see our quality work. As a locally owned and operated business we feel invested in our clients and constantly strive for customer satisfaction. Call or message us to schedule an estimate today!

"Very good, the job was completed very quickly"

Jeremy B on April 2025


Avatar for H K & S Plumbing Co.

H K & S Plumbing Co.

4.67(
74
)
Approved Pro

H K & S Plumbing Co.

4.67(
74
)
Approved Pro
Super Service Award
Customers say: Quick response
77 local quotes requested
25 years of experience

Thank you for choosing H K & S Plumbing Co.! We are committed to providing quality workmanship and superior customer service to all of our existing, and future, clients. We strive to maintain our reputation as a high quality, service oriented company. No job is too big or too small. Call today!

"Very disappointed. This guy is a crook. I paid way too much for what he did and he did not do the work properly. He replaced pipes that were leaking from our upstairs shower. I had another leak a few weeks after he did the repair. 2nd leak was not related to the pipes he repaired, but the 2nd plumber who came out for the 2nd leak had to cut into the ceiling where HK&S Plumbing replaced the pipes and told me that the work was not done properly. He did not glue the pipes properly and he used a rubber coupling that is not allowed in California. The other plumbing company said they would fix his work for 65% less than what I paid HK&S. When I asked HK&S about all this, he gave excuses about the small space and how much more work it would have been to do the work the right way. When I asked him again for a refund, he is now saying his work will last "forever" (really?) and has nothing to say about what he did wrong. He is not giving me a refund. Not sure I will use anyone thru Angi again."

Jamie Y on December 2025

Thank you for choosing H K & S Plumbing Co.! We are committed to providing quality workmanship and superior customer service to all of our existing, and future, clients. We strive to maintain our reputation as a high quality, service oriented company. No job is too big or too small. Call today!

"Very disappointed. This guy is a crook. I paid way too much for what he did and he did not do the work properly. He replaced pipes that were leaking from our upstairs shower. I had another leak a few weeks after he did the repair. 2nd leak was not related to the pipes he repaired, but the 2nd plumber who came out for the 2nd leak had to cut into the ceiling where HK&S Plumbing replaced the pipes and told me that the work was not done properly. He did not glue the pipes properly and he used a rubber coupling that is not allowed in California. The other plumbing company said they would fix his work for 65% less than what I paid HK&S. When I asked HK&S about all this, he gave excuses about the small space and how much more work it would have been to do the work the right way. When I asked him again for a refund, he is now saying his work will last "forever" (really?) and has nothing to say about what he did wrong. He is not giving me a refund. Not sure I will use anyone thru Angi again."

Jamie Y on December 2025


Avatar for Aire Serv of Campbell & Saratoga

Aire Serv of Campbell & Saratoga

4.88(
16
)
Approved Pro

Aire Serv of Campbell & Saratoga

4.88(
16
)
Approved Pro
Super Service Award
Customers say: Quick response
445 local quotes requested
34 years of experience

Looking for reliable Heating & A/C services in the BAY Area and surrounding counties? Look no further than Aire Serv of Campbell & Saratoga. Our team of experts is here to assist you with all your heating and A/C needs. With our exceptional service and attention to detail, we are dedicated to providing the best solutions for all your needs. Contact us today!

"Very well!"

Sanjeev G on September 2025

Looking for reliable Heating & A/C services in the BAY Area and surrounding counties? Look no further than Aire Serv of Campbell & Saratoga. Our team of experts is here to assist you with all your heating and A/C needs. With our exceptional service and attention to detail, we are dedicated to providing the best solutions for all your needs. Contact us today!

"Very well!"

Sanjeev G on September 2025


Avatar for Comfort Energy Inc

Comfort Energy Inc

4.60(
116
)
Approved Pro

Comfort Energy Inc

4.60(
116
)
Approved Pro
Customers say: Quick response
197 local quotes requested
22 years of experience

Message from the Owner/ Founder: “As a third generation heating and air technician and retired 20 year veteran of fire and public safety, I wanted to create a service company that you could count on for its integrity and professionalism. When our service technicians arrive at your home, we want you to feel the same level of confidence and trust you get from a firefighter arriving at your home to help when you call 911. Our service technicians are professional, courteous, and well trained. I am comfortable allowing them into the homes of my families and friends who are firefighters, police officers and the public. Thank you for the opportunity to service your comfort needs and believing in our company. We look forward to a continued long relationship. Warm regards, Harry Abbott” Comfort Energy Inc is a full service provider of quality air conditioning and heating repair and installation. . Locally owned and operated, with over 30 years of experience. We are proud members of the Nexstar network of contractors. We specialize in helping homeowners make informed decisions to best meet your family's comfort needs. Spanish and Japanese spoken.

"We had a wonderful experience with Comfort Energy! The service person, whose name was Chance, did a thorough evaluation of the problem with a focus on saving us as much money as possible, to either repair or replace our 30-year-old heat furnace. He quickly determined that our inlet filter was too dense (it was a Merv 11 and should have been a Merv 8) and that that was probably causing the heater to go off an on every 5-10 minutes. He then tested and confirmed his hypothesis. He also performed a CO test to make sure there wasn't anything more serious going on. Finally, he gave us a good idea of replacement options, which we should probably do before the next Winter, but not necessarily right away. All in all, this is exactly the kind of assessment we needed, and it cost orders of magnitude less than what was estimated by the first service company we had come out. Chance was great, and Comfort Energy is our go-to for heating and cooling service and/or installation from now on."

Gary S on April 2025

Message from the Owner/ Founder: “As a third generation heating and air technician and retired 20 year veteran of fire and public safety, I wanted to create a service company that you could count on for its integrity and professionalism. When our service technicians arrive at your home, we want you to feel the same level of confidence and trust you get from a firefighter arriving at your home to help when you call 911. Our service technicians are professional, courteous, and well trained. I am comfortable allowing them into the homes of my families and friends who are firefighters, police officers and the public. Thank you for the opportunity to service your comfort needs and believing in our company. We look forward to a continued long relationship. Warm regards, Harry Abbott” Comfort Energy Inc is a full service provider of quality air conditioning and heating repair and installation. . Locally owned and operated, with over 30 years of experience. We are proud members of the Nexstar network of contractors. We specialize in helping homeowners make informed decisions to best meet your family's comfort needs. Spanish and Japanese spoken.

"We had a wonderful experience with Comfort Energy! The service person, whose name was Chance, did a thorough evaluation of the problem with a focus on saving us as much money as possible, to either repair or replace our 30-year-old heat furnace. He quickly determined that our inlet filter was too dense (it was a Merv 11 and should have been a Merv 8) and that that was probably causing the heater to go off an on every 5-10 minutes. He then tested and confirmed his hypothesis. He also performed a CO test to make sure there wasn't anything more serious going on. Finally, he gave us a good idea of replacement options, which we should probably do before the next Winter, but not necessarily right away. All in all, this is exactly the kind of assessment we needed, and it cost orders of magnitude less than what was estimated by the first service company we had come out. Chance was great, and Comfort Energy is our go-to for heating and cooling service and/or installation from now on."

Gary S on April 2025


Avatar for Air Sharks

Air Sharks

5.00(
6
)
Approved Pro

Air Sharks

5.00(
6
)
Approved Pro
Super Service Award
Customers say: Quick response
138 local quotes requested
3 years of experience

Air Sharks LLC provides a wide range of HVAC services for residential clients throughout the South Bay. In addition to installing, repairing, and maintaining heating and air conditioning systems made by industry leaders like Daikin and Lennox, the company offers various services that are designed to improve indoor air quality, including ductwork inspection and cleaning. Owner Khaled Alsaka credits much of Air Sharks’ success to its passion for transforming the HVAC process with insightful education, collaborative solutions and top-tier products. “As a pioneering force in the industry, we leverage our extensive expertise to provide our customers with seamless guidance,” he says. “Our dedication to excellence motivates us to continuously exceed expectations, ensuring every interaction reflects our unwavering commitment to delivering five-star service.” Air Sharks offers personalized consultations so it can provide each job with tailored heating and cooling solutions, which Mr. Alsaka says is important for ensuring positive results. “We take great pride in our craftsmanship and attention to detail. Every phase of our process allows us to showcase our expertise, resulting in highly satisfied customers who are eager to share their experience with others.

"Very professional in both sales of the right product AND flawless and timely installation. You can stop your searching for vendors...stop sns start with Air Sharks."

Michael S on March 2025

Air Sharks LLC provides a wide range of HVAC services for residential clients throughout the South Bay. In addition to installing, repairing, and maintaining heating and air conditioning systems made by industry leaders like Daikin and Lennox, the company offers various services that are designed to improve indoor air quality, including ductwork inspection and cleaning. Owner Khaled Alsaka credits much of Air Sharks’ success to its passion for transforming the HVAC process with insightful education, collaborative solutions and top-tier products. “As a pioneering force in the industry, we leverage our extensive expertise to provide our customers with seamless guidance,” he says. “Our dedication to excellence motivates us to continuously exceed expectations, ensuring every interaction reflects our unwavering commitment to delivering five-star service.” Air Sharks offers personalized consultations so it can provide each job with tailored heating and cooling solutions, which Mr. Alsaka says is important for ensuring positive results. “We take great pride in our craftsmanship and attention to detail. Every phase of our process allows us to showcase our expertise, resulting in highly satisfied customers who are eager to share their experience with others.

"Very professional in both sales of the right product AND flawless and timely installation. You can stop your searching for vendors...stop sns start with Air Sharks."

Michael S on March 2025

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Heating and Air Conditioning questions, answered by experts

Yes, you can run an attic fan with the AC on. In fact, you don’t have a choice with a passive attic fan. Plus, when an attic fan draws out hot air from the attic, it helps regulate the temperature of your whole home, so your AC doesn't have to work as hard.

There are a few reasons your AC is running but not cooling your room. Thermostat issues and dust and debris, which can clog your system, are common problems. It could also be a broken component, such as a compressor, blower fan, or evaporator coils. You’ll need to call a pro to diagnose the issue.

The cost of R32 refrigerant is about the same as the cost of R410A refrigerant, the most widely available type of refrigerant today. However, R32 systems use about 20% less refrigerant than R410A systems, making the refrigerant less expensive overall.

There are several AC unit problems to troubleshoot, but luckily you can identify them by keeping a close eye on your system. Look out for the following signs that your AC needs repair:

  • Unusual noises during operation

  • AC unit blows warm air

  • AC unit doesn’t come on or turn off with temperature changes

  • Strange odors come through the vents

  • AC unit cycles on and off rapidly

  • Indoor air is more humid or less comfortable than usual

  • AC unit keeps tripping your breaker

  • Fan in the outdoor compressor doesn’t operate when the AC is on

A calculation method that your HVAC contractor will use to ensure your system does what it's supposed to is measuring duct output, or its CFM. The calculation requires knowing the cross-sectional area of the ductwork and determining the air speed past any given point within it.

The Union City, CA homeowners’ guide to heating and air conditioning services

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