Roger Shoaf wrote:
"Stormin Mormon" wrote in message
...
Takes a bit less electricity when it's colder out. How much,
I'm not sure. Probably not enough to worry about.


Actually I think this is incorrect. The colder the ambiant air around the
condensor the more heat that the condensor will shed upping the subcooling
of the liquid leaving the condensor and reduce the flash gas in the
evaporator.


Also if the nighttime temp is 47F the humidity will be low when the heat of
the day peeks at 80F.

Also if the max temp outside is 80F the house is not going to gain much heat
as the heat transfer is greater when the temp difference is higher.

Pehaps a better approach would be to open windows in the early morning
letting the cool morning air into the house, and then shut the drapes and
windows on the south side of the house in the morning as the sun hit them.

By doing this you can avoid any AC use.



I install a lot of units in businesses where AC has to run year round.
The OP mentioned allergies and an aversion to outside air. For units
meant to run in cold weather, I install head pressure controls on the
condensing units, it's hard to get a lot of HVAC techs to go to all
that trouble in order to make a unit work better in cold weather. A
while back I started seeing dual compressor units for homes that would
drop out one compressor during low ambient outdoor temps and reduce
the capacity of the system. Now I'm seeing inverter controls for the
compressor motors to vary the capacity of the system. I haven't had
an opportunity to install one of those yet but it is interesting.

TDD