Forum Discussion
JaxDad
Aug 06, 2020Explorer III
I’ve been leaving the rearmost roof vent open to dramatically boost my cooling and heating for decades.
People are amazed that I can cool my entire C all the way to the back with nothing but the dash A/C running. I’m not sure why they’d be surprised, in an E-series Ford the factory A/C is a 5 ton unit, the short-coming is the lack of fan capacity to keep up with it. By leaving the rear vent open (I have covers on all of them) the vacuum created by driving down the road pulls cooled air down the back.
People are amazed that I can cool my entire C all the way to the back with nothing but the dash A/C running. I’m not sure why they’d be surprised, in an E-series Ford the factory A/C is a 5 ton unit, the short-coming is the lack of fan capacity to keep up with it. By leaving the rear vent open (I have covers on all of them) the vacuum created by driving down the road pulls cooled air down the back.
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