Often over-shadowed by their ability to keep the house warm in the winter time, Energy Star rated windows also offer very tangible benefits against the sun during the hot summer months. Yes we know hot summer are short in southern Ontario, but when it does get warm here, it can be uncomfortably hot in your home. And for those warm days, most of us don’t have the benefit of air conditioning. High performing replacement windows can reduce the level of solar heat gain into your home (yes you guessed it!) by as much as 50%. Imagine a nice, cool, and comfortable temperature in your home when it’s 80 degrees outside.