Out with the hot air, in with the cool air. Attic Ventilation does this and more. By providing constant steady air ow throughout your attic, stale warm air is vented out giving more room for fresh cool air, also known as “air exchange.” Your attic should never be hotter than 10-25° above the outside temperature during the summer time. A well-ventilated attic will help reduce your energy costs and reduce the temperature in your home in the summer and help to keep your home warmer in the winter.