Residential air conditioning systems are usually 100% recirculating
https://www.quora.com/When-using-just-the-fan-of-an-air-conditioning-system-is-it-the-outside-air-that-is-flowing-or-it-is-just-the-inside-air-that-is-just-turning-round
Curious what HVAC fan do you have that pulls in outside air?
所有跟帖:
• 不懂, 热天FAN ON的确气温更高; 晚上FAN ON的确空气新鲜一些 -deepsigh- ♂ (0 bytes) () 07/04/2023 postreply 07:08:44
• 温差大感觉而已 -外乡人- ♂ (0 bytes) () 07/04/2023 postreply 07:31:01
• 是的 室内循环而已,但是门窗都有缝 -MayX- ♀ (0 bytes) () 07/04/2023 postreply 07:43:43