WINDOWS AND DOORS INSTALLATION & REPLACEMENT ENERGY EFFICIENCY STANDARDS ClearMax® Windows & Doors provide the ultimate way to keep the temperature in your home consistent while still being able to enjoy the view of the beautiful outdoors. The biggest source of temperature fluctuation in every home comes from windows and doors, and these are literally where the biggest holes in your home’s insulation come from. Our windows and doors are designed to completely minimize temperature fluctuation and not let the cool air escape in on those swelteringly hot days, and to keep your home cozy and warm on frigid winter days.