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Not too cold. Not too hot. Your home should feel just right.

We make your indoor comfort our business. And we do it right with heating and air conditioning equipment, service, and repairs that have earned us the loyalty of our customers for more than 35 years.


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  • "

    Clint was very professional and explained everything in an easy to understand fashion. He answered all of my questions and gave his honest opinion as far as what my particular home would benefit from. He made..."

    - Janet S.
  • "

    Bill was easy to deal with, and responsive to my inquiries. His pricing sealed the deal. Brendan and Reid were terrific.....courteous, professional, working hard to make the installation of my new Mitsubishi mini..."

    - Paul R.
  • "

    I am a long time customer of SSI, having a heat pump/AC system installed in the late 90's. Over the years they have always been prompt and courteous whenever I've needed them for service or repairs. They..."

    - Mary S.
  • "

    We had to have a new furnace and AC installed shortly after we moved, after John from SSI looked it over throughly and determined that the old one was unsafe. He explained things very thoroughly. Renee got us on the..."

    - Laura H.

About SSI

Northern Virginia’s Trusted Heating & Air Conditioning Contractor

SSI is a full-service mechanical contractor in Virginia (Va) specializing in creating comfort through indoor heating and air conditioning. Founded in 1979, (SSI) remains committed to the values that have helped us grow from a small family-owned service business to a leading Northern Virginia residential and commercial HVAC contractor.

Still family owned and operated, SSI is now the trusted mechanical contractor for significant commercial enterprises, including Dulles Airport, and we bring indoor comfort to a large number of loyal residential customers. We do it all with an unwavering commitment to quality, timeliness, and value that have been part of our mission from the beginning.

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Latest Blog Post

When to Repair Versus Replace your HVAC System

With summer on the way and temperatures guaranteed to keep getting hotter, your HVAC system is going to need to be working in prime condition to ensure you stay comfortable inside. While heating and air conditioning systems are reliable and have longevity when you have a quality company complete the installation and regularly maintain your unit, just like any piece of equipment, there will come a time when the wear and tear finally get to it. Here, we go into detail about when you should consider a repair, or when it is time to get a new HVAC system.

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