udarrell wrote:
Chris Hill wrote:

On Tue, 12 Jul 2005 13:23:43 GMT, "BE" wrote:



Just a question regarding the blower motor on my furnace. I just
had the evaporator AC coil replaced. I mentioned to him that even
before it went bad the home does not seem to stay cool for long. He
told me to leave the fan switch on the thermostat to on so that it
blows 24/7
Well needless to say that makes a huge difference as the compressor
isn't needed as much.

My concern is will this shorten the life of the motor? And, is it
ok to leave the fan on 24/7 for 2, 3, 4, 5 days? My thinking is to
leave it on for whatever the duration of the heatwave. Correct?




Sounds like a silly idea. The motor will get its life shortened, and
your electric bill will get its dollar amount raised. Also, all
energy put into that motor to spin it eventually becomes if you've
had physics you've already guessed it heat. Heat that will be going
into your house.


Chris, you and Travis hit the nail on the head; the blower adds heat
and will run your electric bill up!
If you want air circulation use a large 20" floor fan in the areas you
will be in; it uses a lot less electricity and produces very little
heat. If increasing the air circulation with a floor type fan allows
you to set the Rm TH to a higher temp - that will save on energy costs and
compressor run time.
Running the furnace blower motor 24/7 will add to much to energy
consumption and add motor heat to the conditioned space. (Losing
equation.) - udarrell

That would be true if the idea was to rely on the cooling effect of
moving air, which is real. However I suspect that part of the reason for
the full time fan is to distribute the cooler air to the areas that are
warmer e.g. moving stagnate cool air on the first floor to the warmer air on
the second floor or from room to room.


--
Joseph Meehan

Dia duit