15881 Commerce Ct
Upper Marlboro, MD 20774-7407
301 249 0300

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Local Reviews

Rated 4.9 out of 5 stars based on 4491 customer reviews

should have been no charge,system is only 3 years old

The tech was more than qualified, very professional

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Garbage Disposal Replacement

Anthony was extremely knowledgeable and professional in his approach to resolving the problem. We would highly recommend him.

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Unhappy Customer

On 13 May 19, Belair Engineering personnel came to pick up the old water heater that they had replaced on 10 May 19. The installation was satisfactory; however, during removal of the old water heater, the Belair Engineering personnel damaged my walls, two doors, and screen door. The water heater should have been strapped down and covered with bubble wrap to prevent any damage to my property. I called Belair Engineering's management (Don) to register my complaint; I also forwarded 7 photos showing damages via my cell phone; I also had to tell the installer to clean up after completing his work. Suggestions: Use straps on cart/bubble wrap.

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Belair is Outstanding!

10/10! Brandon did my quote and install, he did such an amazing job. Can't thank you guys enough. I'll be sure to leave reviews on social media as well.

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Awesome job!

Great guys, very professional, excellent work!!

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Professional, thorough service

The technician, Santos M, was thorough and professional during the HVAC check up service. He took the time to answer my questions and explain his measurements. He made a simple repair quickly and did a few extra thins such as hosing off the condenser coils on the outside unit.

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Great service rep= Warren was extremely knowledgeable and through in his inspection and testing of the entire system.

Warren was most professional and dedicated to providing the utmost support in fulfilling his service functions.

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Excellent knowledge and customer service!!!

It’s worth utilizing Belair to service your Hvac and Fireplace

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Happy Customer

I’m extremely pleased with the recent installation of my new heat/air system! The workmanship is first rate and the system is working beautifully! I highly recommend Belair Engineering!

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Great Service at fair price

Plumber repaired exterior spigot within 90 minutes.

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Job Locations

Richard C.

Richard C. Job Checkin


Buddy P.

Buddy P. Job Checkin

Replace 80% gas furnace AC coil

Replace 80% gas furnace AC coil

Abe A.

Abe A. Job Checkin

No ac

No ac

Abe A.

Abe A. Job Checkin

Leaking water

Leaking water

Santos M.

Santos M. Job Checkin

Mini split heat pump repairs

Mini split heat pump repairs

Abe A.

Abe A. Job Checkin

No ac

No ac

Jose S.

Jose S. Job Checkin


Abe A.

Abe A. Job Checkin

Spring check up


Mike E.

Mike E. Job Checkin

Install heat pump air handler 15 KW

Install heat pump air handler 15 KW

Abe A.

Abe A. Job Checkin

Spring check up

Spring check up

Warren G.

Warren G. Job Checkin

Air conditioning Service

Air conditioning Service

Anthony B.

Anthony B. Job Checkin

Spring maintenance


Hugo R.

Hugo R. Job Checkin

Carrier air conditioning service and repair

Carrier air conditioning service and repair

Abe A.

Abe A. Job Checkin


Abe A.

Abe A. Job Checkin

Leaking water

Leaking water