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 livermore, ca

Rated 5.0 out of 5 stars based on 6 customer reviews

Excellent Job!

Diego and Eric did an excellent job today. They helped me checked the condition of the AC system. There were something unexpected happened, but by they were able to get it quickly fixed. Thanks!


Response from Certified Heating and Air Conditioning:

Hi Bob! Thank you for your kind words! We are so glad Diego and Eric provided such great service during your air conditioning maintenance!

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Excellent service

Great thorough service


Response from Certified Heating and Air Conditioning:

Hi Nicole. We are happy you were happy with our furnace service and dryer vent cleaning! Thank you for the review. -Certified Customer Care Team

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Great service

Certified called me to confirm appt and then again to let me know when Brittany would be st my house She was on time, personable and professional

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Great Service

Brittany was great, fully explained what she was doing and why, quick/efficient

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Very efficient and thorough

First time we used this company and were very pleased. On time was a big plus. The tech, Brittany, was knowledgeable & explained all she was doing & what may have to be done in the future.

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well educated got it fixed there was no problems

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Job Locations
for livermore, ca

Diego C.

Diego C. Job Checkin

In Livermore, California performing a furnace maintenance x2 for the Bagade residence!

In Livermore, California performing a furnace maintenance x2 for the Bagade residence!

Lee J.

Lee J. Job Checkin

Here in the Livermore area performing a balance test on duck work, installing a new kumo cloud and ensuring that airflow was perfect throughout the home


Galen  S.

Galen S. Job Checkin

In Livermore, California to walk through our installation process for the new heat pump, ductwork, and insulation we will be installing next week. Looking forward to making their home more efficient, keeping them cool this summer, and saving money on heating during the cold months. Having solar along with their new Mitsubishi heat pump system will make a huge difference in their utilities bill.


Galen  S.

Galen S. Job Checkin

In Livermore, California to discuss replacing a central gas furnace and air conditioning system with a high efficiency heat pump system. We also are looking into replacing all of the ductwork and adding insulation as well

In Livermore, California to discuss replacing a central gas furnace and air conditioning system with a high efficiency heat pump system. We also are looking into replacing all of the ductwork and adding insulation as well

Diego C.

Diego C. Job Checkin

In Livermore this afternoon performing a preventative maintenance for the Gu residence. There 25 year old system is still going strong!

In Livermore this afternoon performing a preventative maintenance for the Gu residence. There 25 year old system is still going strong!

Jackie G.

Jackie G. Job Checkin

Hello Livermore Ca. Finishing off this evening with an air conditioning maintenance. This is a 2010 Lennox compressor that needed a good cleaning! We tested refrigerant levels and motor amps! Everything is checking out good! Take a look at some pics!

Hello Livermore Ca. Finishing off this evening with an air conditioning maintenance. This is a 2010 Lennox compressor that needed a good cleaning! We tested refrigerant levels and motor amps! Everything is checking out good! Take a look at some pics!

Diego C.

Diego C. Job Checkin

In Livermore, California performing a furnace maintenance and a/c safety check for the Coghlan residence. There 26 year old system was scheduled for a tune up today to see if we can prolong life of there equipment!

In Livermore, California performing a furnace maintenance and a/c safety check for the Coghlan residence. There 26 year old system was scheduled for a tune up today to see if we can prolong life of there equipment!

Diego C.

Diego C. Job Checkin

In Livermore, California this afternoon performing a a/c maintenance and furnace safety check for the Gorilla residence. The 3 year old system is ready for the summer months when ever it decides to get warm again!

In Livermore, California this afternoon performing a a/c maintenance and furnace safety check for the Gorilla residence. The 3 year old system is ready for the summer months when ever it decides to get warm again!

Jeremiah  S.

Jeremiah S. Job Checkin

I am in the Livermore area today performing a furnace maintenance! This furnace has been running very well and has kept our customer extremely happy! If you are in the area and need our services, never hesitate to contact us! 😊

I am in the Livermore area today performing a furnace maintenance! This furnace has been running very well and has kept our customer extremely happy! If you are in the area and need our services, never hesitate to contact us! 😊

Galen  S.

Galen S. Job Checkin

In Livermore at Mr. Gu’s house to provide an estimate for upgrading his standard single stage equipment to a hybrid dual fuel heat pump system. I explained how the equipment operates and discussed the various options for his house.

In Livermore at Mr. Gu’s house to provide an estimate for upgrading his standard single stage equipment to a hybrid dual fuel heat pump system. I explained how the equipment operates and discussed the various options for his house.

Wyatt C.

Wyatt C. Job Checkin

Today we are preforming a AC installation with a brand new TempStar 2.5 Ton 14 seer Condenser in Livermore CA. Can’t wait for these clients to experience complete comfort!

Today we are preforming a AC installation with a brand new TempStar 2.5 Ton 14 seer Condenser in Livermore CA. Can’t wait for these clients to experience complete comfort!

Tyler B.

Tyler B. Job Checkin

Tune up. Need to have annual maintenance so that we can prevent issues like this from happening.

Tune up. Need to have annual maintenance so that we can prevent issues like this from happening.

Brittany B.

Brittany B. Job Checkin

Performing precision tune up service on 1996 Payne Condenser. System is running but not cooling properly. Diagnosed low refrigerant and possibly failing metering device which is not allowing the refrigerant to move properly at this time. Added 2 lbs of R22 refrigerant to Balance, system is cooling but still showing signs that the metering device is sticking. Made recommendations for further repairs and went over options for replacement.

Performing precision tune up service on 1996 Payne Condenser. System is running but not cooling properly. Diagnosed low refrigerant and possibly failing metering device which is not allowing the refrigerant to move properly at this time. Added 2 lbs of R22 refrigerant to Balance, system is cooling but still showing signs that the metering device is sticking. Made recommendations for further repairs and went over options for replacement.

Lucas G.

Lucas G. Job Checkin

Performed air conditioner tune up on a 4 year old Carrier. System had no issues other than being over charged. Balanced to the appropriate levels, increasing efficiency. Performed duct inspection and found that the one vent needed to be repaired.


Yvonne G.

Yvonne G. Job Checkin

Ac maintenance

Ac maintenance