Assume that the output of two 5k units are equal to the output of a 10k unit.
Check out the current draw on each of the two units. Multiply the current draw
of the 5k unit by 2 and compare it against the current draw of a 10k unit.
There is your answer.
email@example.com (KJFK) wrote in message
Can't reasonably guess from info you provide. Consider that mounting
a window unit breaks the window seal, and that current efficient
window units seal very tightly. Two such bypassed seals at different
elevations can have significant chimney effect.
OTOH, having cooling capacity distributed makes it possible to use it
more closely to where you need it, when you need it.
Many other factors apply, like locating on sunny/shaded side of house,
or one 10000 window a/c.
If *all* things are truly equal - the 10,000 btu will be cheaper to operate.
However if more cool air is required in a one area versus another (possible
second floor or part of the house with more sun exposure) then individual
units may pay for themselves over the life of the units.
If you cool the entire house, it is expensive. If you just cool the room
you are using, it is cheaper. So I have several window units and only use
them when I am using the rooms.
So maybe get a 10,000 to cool the entire house and a 5,000 for the bedroom?
Then just run the 5,000 at night. Be sure to get energy star units which
"KJFK" wrote in message
If you run out of windows to mount them in then the discussion has an obvious
My old house really had only two windows that were an air conditioner could be
and where it would not be an obvious eye sore. Two 5000 btu units were enough to
the edge off an otherwise unpleasant day - if I want grocery store quality cold
air I would
have had to buy two larger units.
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