MrNoodly said:So why run outside air through an exchanger instead of just blowing or sucking it directly into the vehicle? If you're going to raise the temperature of incoming air, what with? The air that's already in the vehicle?
What's to keep the cool outside air from cooling the warmer inside air? Or if you're trying to cool the interior, what's to keep the warm inside air from warming the cooler outside air?
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