Everyday Thermodynamics: Refrigeration: Unravel the secret of refrigeration by focusing on the connection between heat, temperature, work, and energy. Then see how these thermodynamic concepts apply to the vapor-compression cycle in your refrigerator or air conditioner. Discover that a heat pump operates the same way.

Heating, Ventilating, and Air-Conditioning: Explore heating, ventilating, and air conditioning—known as HVAC. Begin by learning how thermostats regulate temperature. Then review how heat transfer takes place, and investigate the pros and cons of heating with a furnace, boiler, and heat pump. See how air conditioning integrates into each of these systems.