Maryland HVAC Resources


  • How Air Conditioners Work – An article describing the mechanics and processes behind air conditioning units.
  • Consumer Info – ACCA – Resources to help consumers, including homeowners and managers, to make decisions regarding contractors and HVAC systems.
  • Air Conditioner 101 – Learn about the basics of A/C units, types of units, SEER, and other information.
  • EPA on HVAC – A more in depth look at how HVAC systems are designed and how engineers make decisions.


  • Trane – Founded in La Crosse, Wisconsin, Trane has been providing HVAC products for over a century.
  • Carrier – Willis Carrier invented the modern air conditioning system and his legacy lives on.
  • Ruud – One of North America’s leading manufacturers of residential and commercial HVAC products.
  • Aprilaire – A company committed to innovating indoor air quality solutions.
  • Rheem – A leading company in the global market for heating, cooling, and water heating products.
  • Lennox – Provider of a large variety of HVAC products including solar solutions.


  • NATE – North American Technician Excellence is a non-profit organization whose mission is to test and certify people with working knowledge of HVACR systems.