Home weatherization is an easy and affordable do-it-yourself project that can be done in as little as a weekend. Air conditioning units can provide added comfort during the hot weather but oftentimes require protection from the elements during the cold-weather months. The Duck Brand Indoor Window Air Conditioner Cover is a reusable easy-to-install cover that is used inside your home around your window air conditioning unit to seal in climate controlled air and seal out drafts dust and insects.