Washington, DC Heating, Cooling and Solar Energy

Washington Metropolitan Area

Long Engineering

Looking to go green so you can save some green? Well look no further then Long Engineering – we are the premiere full green HVAC and solar service company in the Greater Washington – Baltimore region.

Installation and repairs for all brands and models
No matter what type of heating or cooling unit you have – boiler, furnace, heat-pumps or air conditioning system – you will receive the best green technology and energy management systems.

Let Long Engineering reduce your energy cost

Offering you the finest brands in solar, heating and air conditioning
No matter if you want to improve your indoor air quality or reduce your energy usage and energy cost – Long Engineering is here for commercial, industrial and residential customer.

Give Long Engineering a call today at 202-657-7978 to schedule your appointment for a FREE estimate.

Heating, Cooling and Solar Energy - Washington, DC - Long Engineering

Long Engineering


Washington,  DC   20019






Business Hours

  • Available 24/7

We accept

  • Visa
  • Master Card
  • American Express
  • Discover

Financial plans available


We are licensed, bonded and insured.

CFC Certified
Leadership in Energy and Environmental Design (LEED) Certified
Building Performance Institute (BPI) Certified

Long Engineering 202-657-7978

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