On May 8, 3:30*pm, "scorpster" wrote:
I saw both single and double pipe models at Costco. *I think one is 10,000
BTU the other one 14,000 BTU. *Just curious why is single pipe so bad?
Because of the lower BTU or is it less efficient with electricity?

With a single pipe design you’re throwing out the baby with the bath
water. In other words you’re discharging the cold air that you used
all that electricity to make along with the heat that you’re trying to
get rid of. With the two pipe system you’re not touching your precious
cold air, you’re just re-circulating the outside air through the unit
to get rid of the heat without it ever getting inside the living
space.