This Old House plumbing and heating expert Richard Trethewey instructs Kevin O’Connor on the basic principles of how a heat pump works. #ThisOldHouse #AskTOH SUBSCRIBE to This Old House: http://bit.ly/SubscribeThisOldHouse The heart of the heating and cooling system will be a heat pump. This Old House plumbing and heating expert Richard Trethewey uses a mock up and props to show host Kevin O’Connor the mechanics of the latest state of the art heating and cooling system. Heat pumps have compressors, valves, and fans that regulate speed and opening so a system can evenly maintain itself and keep temperatures steady to the exact degree. About This Old House TV: This Old House is the No. 1 multimedia home enthusiast brand, offering trusted information and expert advice through award-winning television, a highly regarded magazine, and an information-driven website. This Old House and Ask This Old House are produced by This Old House Ventures, LLC and are presented on PBS by WETA Washington, DC. Follow This Old House and Ask This Old House: Facebook: http://bit.ly/ThisOldHouseFB Twitter: http://bit.ly/ThisOldHouseTwitter http://bit.ly/AskTOHTwitter Pinterest: http://bit.ly/ThisOldHousePinterest Instagram: http://bit.ly/ThisOldHouseIG Tumblr: http://bit.ly/ThisOldHouseTumblr How a Heat Pump Works null