The Basics.

.Energy enters or exits your home in an unintended way through three primary ways:

1.) Radiation-

energy travels through windows without special coatings, blinds and curtains, and attics without reflective material to rebound the suns intense rays.

2.) Convection-

energy travels through gaps in the walls, windows, roof, and floors to leave or enter your home when you don't want it to.

3.) Conduction- 

energy travels through poorly insulated walls, windows, floors, and roofs by transferring through solid materials.