SEER Calculator

SEER Calculator »

Buying a new HVAC system? Calculate SEER and save money.

HVAC Troubleshooter

HVAC Troubleshooter »

Why bother if you can check and fix the problem yourself?

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(301) 774-4200

About Us

About Us

When it comes to keeping your heating and air conditioning systems running smoothly and efficiently year-round in theOlney, Gaithersburg, Silver Spring and greater Montgomery County, Maryland area, you can always trust the experienced hand of ADI Heating and Air-Conditioning. Based in Montgomery County, Maryland, we have over 30 years of experience in serving the greater Washington DC area and specialize in all aspects of indoor air quality and comfort, both residential and commercial

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Our Services

Furnace Services In Gaithersburg, MD

Furnaces

We are serious about providing your family or light commercial property the best in the heating industry. Your customer experience and comfort is our top priority!

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Air Conditioning In Gaithersburg, MD

Air Conditioning

We are serious about providing your family or light commercial property the best in the air conditioning industry. Your customer experience and comfort is our top priority!

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Commercial Refrigeration in Gaithersburg, MD

Commercial Refrigeration

Regardless of how major or minor your refrigeration issue is, we recommend that you have professional maintenance and repair to your systems. This will prevent damage and ultimately save you time and money.

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Indoor Air Quality In Gaithersburg, MD

Indoor Air Quality

Your home indoor air quality matters for the safety of your home, your family’s quality of health and energy costs savings. Learn more on the importance of the right affordable systems available. Get your home tested and begin breathing easier today!

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Testimonials