There are many aspects to understanding a heat gain in a home. In this quick video Chris Morin goes over what attributes of the environment and building have the greatest impact on your overall heat gain calculation.
In particular, these elements include:
- Windows & Glass Doors: the exposure direction, number of lights and type of internal shades
 - Skylights: The tilt angle, exposure direction and number of lights
 - Vertical glass: The overhang that alters how the sun may stream into the home
 - Vertical glass - Whether there is a projected construction or insect screen
 
Interested in more videos like this? Check out short clips from Chris Morin:
- Optimizing HVAC Efficiency: Evaluating Windows for Heat Gain and Loss
 - Ductwork and Duct Leakage: Evaluating It's Impact
 - Dive into the details of factors that drive Heat Loss Calculations: U-Values and BTUs.
 - Discover how to evaluate home infiltration, otherwise known as air exchange, using both a blower door and inspection.
 - How to Measure Infiltration in Residential Buildings