Quote:
Originally Posted by Xringer
I've seen some of those old style systems with the "fan blowing straight up"
and it sure makes me wonder what they were thinking.
When it's off during a snow storm.? tub.
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Those are designed primarily as AC units. Cooler air is sucked in from the sides and hotter air is blown upward, where it continues to rise. Nice and efficient. Then to (conveniently) make a heat pump out of it, they just put a reversing valve in the freon part of the system. The cold air is then sucked in at the sides and even colder air is blown out at the top, where it drops down to be recycled (but mixes with other, warmer air). Not so efficient. But in areas like the South where the main requirement is AC, they work nicely. Every system I see down here is that design.