Hybrid - A hybrid air-con device uses a combination of electrical energy and fossil fuels. It has a dual use, in that it can be utilized to expel scorching air outside in the summertime, and from the Winter season it will do the opposite to maintain the place warm. File https://restaurant-and-bar-ventil23322.thelateblog.com/30091570/the-ultimate-guide-to-eco-friendly-commercial-ventilation