Once the thermostat senses a adjust in temperature, it sends a sign for the zone damper, which opens or closes to control the air move to that zone. THIS column gives information regarding the use of outside air dampers in warm and humid climates and during very hot and humid https://air-control-dampers-for-h23455.tokka-blog.com/36932584/the-fact-about-air-control-dampers-for-engine-sheds-that-no-one-is-suggesting