We live in a mobile home in the southwest.
The central A/C unit is about 10 years old.
When the unit needs replacement,
could I get comparable cooling by installing
3 X 5K window units throughout the house ?
It would certainly be a helluva lot cheaper.....
How about efficiency ??
Good plan? or not ......
Check the total current draw of the 3 units compared to the single that you
would have instead. Next, consider the air circulation It may not be
adequate to keep the entire place completely cooled. Bathroom, for instance
may be a hot spot. This can be overcome some with a fan. That will give
you at least a start on your comparison.
Window-shakers would make it trivial to zone the cooling, maybe more
than you really want. Depending, they are noisy.
Their side-curtains for sealing opening in window are typically lousy,
which doesn't boost efficiency.
Window-units should really be on a circuit such that there's minimal
voltage drop from the panel to the outlet, so some rewiring may be in
order. Of course, for motor-loads, the outlet should not be
"back-stabbed", but with screw-terminals.
For comparable cooling, your current central air conditioner would have to
be 15,000 BTU, and they don't make them that small. Your current unit is
probably 230 volts, and most 5,000 BTU window units are 115 volts. To match
the BTUs you have now, 115 volt units, it will cost you twice as much in
All the previous posters are full of it.
The windows units will cool your house just fine and at half the cost
of your central unit. Assuming of course, that you do the smart
thing and only buy high EER units. Nothing lower than a 11 EER.
And you can buy 220 or 110 and have a line run if one is not there.
You probably aren't using that 220 line behind your gas stove, anyway.
I didn't know that they had 11 EER window shakers. Did you mean 11 SEER?
Anyway, yes, the window unit configuration can actually cost less to
run, that is, given the inherent zoning capability that goes above and
beyond the control offered with typical zoned central systems. Also vs
an initial install they would be much much cheaper up front due to lack
of ductwork. But I'll stick with my central AC nevertheless :)
Pay no attention to the dwarf behind the curtain (BoB).
He has no clue that manufacturers make 1.5 ton units (Thats 18,000 btu
As for the rest of your 115 volt BTU babble.............I think you
need to stop taking whatever you are taking and get some help.
There is NO difference in the units efficiency or operating costs based
on whether it operates on 230-volts or 115-volts.
Doubling the voltage halves the amperage for the same wattage
requirements. a 230-volt load reduces the amperage load on conductors, etc.
The EER rating has to due with the design of the A/C NOT the voltage it
operates with. - udarrell
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