Hybrid - A hybrid air con device employs a mix of electrical energy and fossil fuels. It's a twin utilization, in that it can be used to expel very hot air outside the house in the summertime, and inside the Winter season it can do the other to keep the https://eco-friendlycommercialven19741.blogminds.com/considerations-to-know-about-eco-friendly-commercial-ventilation-27243098