Washington, DC Energy Audits and Green Technology

Washington Metropolitan Area

Long Engineering

We will work closely you with to assist in making informed decisions about cost effective methods to reduce energy and water costs for commercial and/or residential properties. Through energy audits, system upgrades, and green technology, we are ready to meet your energy and water needs!


Let our Leadership in Energy and Environmental Design (LEED) consultants help you with your commercial energy audit:

  • Indoor air quality
  • Site analysis
  • Water
  • Energy
  • Water usage
  • Health and safety

Our trained staff can incorporate HVAC design credits into your LEED project, train staff on the operation and maintenance of improved systems while providing the services needed to provide efficient energy retrofits.

Energy Star Portfolio Manager is available upon request.

Let our Building Professional Institute (BPI) certified professionals help you with your residential audit:

  • Make sure your home is environmentally and economically feasible
  • Test how energy is being used at home
  • Air analysis
  • Health and safety
  • Let us show you how to save money on your energy bill!



Solar Thermal Collectors / Solar Panels - Washington, DC - Long Engineering

Whether you prefer solar panels or solar thermal collectors Long Engineering is here to assist you save money on your energy bill. The panels are Buy American Compliant and SRCC Certified which qualifies for Federal, State, and local incentives, such as rebates and tax credits.

Our panels are excellent for commercial and residential applications alike.


High Volume

Water Generators - Washington, DC - Long Engineering

The water generator uses patented air-to-water technology to produce up to 300 gallons of fresh drinking water per day from humidity in the air! By bundling a few machines together, you can have over 900 gallons of water per day for:

  • Homes and New Construction
  • Health Clinics and Schools
  • Farms and Greenhouses
  • Government and Military Uses
  • Humanitarian Aid and Emergency Relief

Alternative Energy Water Machines

Alternative Energy machines are able to operate on solar panels, wind turbines and biofuel-gasifiers. Using only 3.6 kilowatts of electricity, the 125 model can be powered using Biofuel-Gasifiers an electric power generator which runs on any and all bio fuels, such as wood, cow manure, dried brush, trash, etc.


Alternative Energy Water Machines - Washington, DC - Long Engineering

Make refreshing drinking water from the water vapor in the air so there’s no impact to your local water supply or your water bill. Under the right conditions it will make a gallon of water for as low as $0.16 a gallon. Compare that with $1.00 a gallon (3.78 liters) charged by most bottled water companies, and the choice becomes crystal clear.

Call us today at 202-657-7978 for more information. Estimates are always FREE and there is no charge for travel.

Energy and Solar Service - Washington, DC - Long Engineering
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