Nehmo wrote:
If a house currently has multiple window air-conditioners, are these
significantly less efficient than central air, if the house were
retrofitted with it?

I realize the comparison is complicated, so assume all other factors
equal, and assume: the vents and their position for central air would
be adequate; about half the rooms are normally in use; nobody's
concerned about the window-view obstruction, etc.; Chicago climate;
poorly insulated house.

A companion question is, does the efficiency of air conditioners
increase significantly with size?

|||||||||||||||| Nehmo Sergheyev ||||||||||||||||

Generally whole house will be more efficient and more trouble free as
well as quieter.

Windows units can be more efficient as you can zone each room, so while
the individual unit may be less efficient, you may use less overall energy
because it is easier to turn them off in one room.

Frankly, I would go with central.


--
Joseph Meehan

Dia duit