In the event the thermostat senses a change in temperature, it sends a sign on the zone damper, which opens or closes to regulate the air circulation to that zone. بطاقة العربية للطيران بلاتينوم الائتمانية تذكرتك لمزيد من السفر Probably the most prevalent sorts of dampers in HVAC programs is https://knoxgxnbo.popup-blog.com/35510260/the-definitive-guide-to-air-control-dampers-for-engine-sheds