Our Home Renovation: HVAC course teaches you the basics of residential heating, ventilation, and air conditioning (HVAC) systems. Learn the terminology used in the HVAC industry, and get an understanding of the physics of heat, its generation, and its application in residential HVAC. Study how heat is lost through the building envelope and how furnace and air conditioning systems are sized. Explore insulation (its properties and types), the products of combustion, and the safe venting of those products from the building envelope.