5040 Commercial Circle, Unit C
Concord, CA 94520
(925) 438-8367

Have any feedback for us? We'd love to hear it! Call us at (925) 326-6232 and let us know how we are doing.


Local Reviews
for castro valley, ca

Rated 5.0 out of 5 stars based on 12 customer reviews

Great Service!

Eric was very helpful. He provided information as he worked on our unit.


Response from Certified Heating and Air Conditioning:

Hello Lynn, We are delighted to hear our fantastic teammate Eric provided great service for you today on your annual maintenance appointment. -Certified Customer Care Team

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Excellent in all aspects

Eric was knowledgeable, and courteous. I have 3 dogs and Eric was very respectful. As always the Certified team went over and above what is expected.


Response from Certified Heating and Air Conditioning:

Hello MaryJane, Thank you for sharing your experience! We love animals! We love going above and beyond for our clients! -Certified Customer Care Team

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Excellent service

Great service. Tech was very knowledgeable


Response from Certified Heating and Air Conditioning:

Hello Tuan, We are happy that our teammate was able to take care of your HVAC service needs and that you were satisfied with our services provided. -Certified Customer Care Team

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Best in the Bay!

The best in the bay! Expert installation and really above and beyond quality craftmanship!


Response from Certified Heating and Air Conditioning:

Hello Christopher, We love this! Thanks for sharing your feedback and we are happy you are happy with our new HVAC equipment! -Certified Customer Care Team

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Great service

Explain everything about the furnace very clearly!

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Great service and professionalism

Lee and his partner were great. Lee found b issue with one part of our attic but was able to resolve the issue. I appreciated his thoroughness, his sharing of information and his professionalism. They made sure the house was vacuumed and cleaned. Thanks so much.

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Thorough and courteous

Diego was thorough with his inspection and very professional and courteous

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Great Service!

Brittany was awesome! So friendly and helpful

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Excellent customer svc

Diego was very nice and cordial did a thorough job and was super informative

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Wyatt Cochran/ Certified

I have no complaints about Wyatt & his team. All I can say is They did a great job. Wyatt can installed two furnaces within 2 days. Wyatt was so patient and smiled face listening to my complaints for hours. I was not happy about the first one he installed then replaced the 2nd one per Galen to satisfy my request. Nothing I can say, great job & great team work. Thank you very much for being honest to me.

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Galen Squyres /Certified

Finally I replaced my 40 years old furnace with Certified. I have called around several companies and 3 of out of 4 refused to take the job after they looked at my furnace and air ducts. After my son replaced his furnace with Certified, he referred me to talk with Galen. He said maybe Galen can help me to reduce my gas bill and the loud noise of the furnace and it didn't warm up my house. When Galen came to my house to look at my furnace, he was so patience and explained detail about the new furnace. I would like to give Galen a big round of applause. He did a great job. He and his team have installed a large furnace for me in one day. It was large enough to heat up my whole house. I didn't like it because it's kind of over size for my space. I complained the next day. Galen was very patience and listed to my complaining. I couldn't believe that Galen suggested his team to down size the furnace as soon as possible. He and his team have installed a 2nd new furnace and a new AC within 7 hours. I felt immediately. The sound is soft, gentle and warm. I can hear other people talked when the heater was running. This is first time that I have air condition for my house. It soft and cool. I can't say more but just compliment. I appreciated his honesty. My husband and I are very satisfy with Galen and his team 's works. I will refer my friends or family to Galen/Certify Company and I will call again if I have a 2nd home.

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Great service

Michael was very nice!

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Job Locations
for castro valley, ca

Ben C.

Ben C. Job Checkin

Completed x2 furnace. Maintenance for valued club client


Galen  S.

Galen S. Job Checkin

I am in the Crow Canyon area of Castro Valley, California. We are looking at replacing 2 heat pump systems

I am in the Crow Canyon area of Castro Valley, California. We are looking at replacing 2 heat pump systems

Galen  S.

Galen S. Job Checkin

I am in Castro Valley, California to provide an estimate for a gas furnace replacement

I am in Castro Valley, California to provide an estimate for a gas furnace replacement

Eric S.

Eric S. Job Checkin

In Castro Valley, CA performing an A/C maintenance and furnace safety check for the Mayate residence. Their 6 year old HVAC system is maintained and running efficiently.

In Castro Valley, CA performing an A/C maintenance and furnace safety check for the Mayate residence. Their 6 year old HVAC system is maintained and running efficiently.

Eric S.

Eric S. Job Checkin

In Castro Valley, CA performing a Furnace maintenance and safety check for the Leonard residence. Their 2 year old system is maintained and running efficiently.


Galen  S.

Galen S. Job Checkin

In Castro Valley, California to look into a multi-cassette split system


Diego C.

Diego C. Job Checkin

In Castro Valley this afternoon, the sposito residents needed a new capacitor and thermostat today. They not have proper cooling!

In Castro Valley this afternoon, the sposito residents needed a new capacitor and thermostat today. They not have proper cooling!

Galen  S.

Galen S. Job Checkin

In Castro Valley to look into upgrading a central gas furnace system

In Castro Valley to look into upgrading a central gas furnace system

Wyatt C.

Wyatt C. Job Checkin

All finished insulating ducting in Castro Valley, Ca. Glad we were able to help these ducts maintain their Heat!

All finished insulating ducting in Castro Valley, Ca. Glad we were able to help these ducts maintain their Heat!

Galen  S.

Galen S. Job Checkin

On Castro Valley to look at removing a split system and install a new ac unit on the existing central furnace

On Castro Valley to look at removing a split system and install a new ac unit on the existing central furnace

Wyatt C.

Wyatt C. Job Checkin

Day 1 installing a new high efficiency furnace in Castro Valley, Ca. Cant wait for our client to see the difference in their new system!

Day 1 installing a new high efficiency furnace in Castro Valley, Ca. Cant wait for our client to see the difference in their new system!

Jackie G.

Jackie G. Job Checkin

Starting off today with a Williams wall furnace. These units are pretty straight forward. We did a full thorough cleaning of the grills and covers . We cleaned the guys behind the cover grill. There was some signs of over heating. The coating on the flu pipe was just chipping off. Checking out of Castro Valley Ca! Thank you for choosing team certified !

Starting off today with a Williams wall furnace. These units are pretty straight forward. We did a full thorough cleaning of the grills and covers . We cleaned the guys behind the cover grill. There was some signs of over heating. The coating on the flu pipe was just chipping off. Checking out of Castro Valley Ca! Thank you for choosing team certified !

Chris L.

Chris L. Job Checkin

Installed new coil on existing furnace in the hills of Hayward,ca

Installed new coil on existing furnace in the hills of Hayward,ca

Wyatt C.

Wyatt C. Job Checkin

Just wrapped up a 8 Vent Duct replacement in Castro Valley, Ca. Glad were able to have this system cleared of asbestos and replaced with all new Flex Ducting!

Just wrapped up a 8 Vent Duct replacement in Castro Valley, Ca. Glad were able to have this system cleared of asbestos and replaced with all new Flex Ducting!

Jackie G.

Jackie G. Job Checkin

Checking into Castro Valley Ca. Today I’m working on a 2014 Bryant furnace. The blower motor is leaking oil and the inducer motor is almost reaching its maximum amp draw meaning the motors are stressed out. If you have the same things going on in your own homes give us a call. There are ways to make our machines last longer and run under less stress!

Checking into Castro Valley Ca. Today I’m working on a 2014 Bryant furnace. The blower motor is leaking oil and the inducer motor is almost reaching its maximum amp draw meaning the motors are stressed out. If you have the same things going on in your own homes give us a call. There are ways to make our machines last longer and run under less stress!