On May 21, 2:27*pm, Duesenberg wrote:
On 5/21/2012 1:34 PM, Oren wrote:





On Sun, 20 May 2012 22:41:30 -0400, *wrote:

I have an Emerson thermostat that claims to have a feature called cool
savings...

I tried to Google this feature and Emerson says its designed to adjust
the programmed set point temperature during high demand use of a central
air conditioner. *I think they mean that the thermostat will call on the
variable speed fan/ECM fan will blow faster to similate cooler air,
without the compressor running all the time, but that's just my guess

I can't really get any more information other than that.

I've only had this blower unit/furnace and thermostat for 4 months so no
history with it. *Today was first day using the aircond this year
however A coil and compressor unit are 14 years old, and were run on a
different thermostat the past 13 summers.

Anyone care to explain what this feature is and how it works? *Emerson
"Cool Savings"

I can't explain. *My HVAC unit has a feature that calls the blower on
low, as to re circulate the already cool air in the home. *It later
calls the AC on and the compressor starts.

Like that?

I guess. * I suppose the blower will help dehumidify making the air feel
cooler without calling on the compressor all the time?

The blower can't lower the humidity without the
compressor running. It requires the evaporator
to be cold to condense the water.





On mine it's called from the thermostat and there are 6 different
settings but the manual doesn't really explain how the feature really
works. Is yours called from the thermostat or the control board?

This is their explanation, which explains little.. It's from White
Rodgers' Youtube page

http://www.youtube.com/watch?v=SgS9KTl2eSc- Hide quoted text -

- Show quoted text -

What the guy is saying is this. Let's say I set my thermostat to 72
in cooling mode. On days when
it's not very hot, let's say it's only upper 70's, the
system won't run very much to maintain 72 deg.
With the compressor only running a little, the
humidity in the house will stay higher than it
would if the compressor was running a lot. That's
because the more the compressor is on, the more
humidity it's going to extract from the air.

Now on days when it's 90 out and the compressor
is running a lot, it will take out more humidity from
the air. If the thermostat still maintains that 72 deg
set-point, you will wind up with the house at 72 and
with lower humidity than you did on the day when
the system was only running a little to maintain 72.
Consequently it will feel cooler to humans. So, to
save energy and compensate for this, the
thermostat realizes the compressor has been
running a lot and instead of maintaining the set
temp of 72, it maintains a slightly higher temp, of
maybe 74. To you it feels about the same coolness
as it did on the other day when it was 72, because
the humidity level is lower from the compressor
running a lot.

With a dumb thermostat you could do the same
thing by just raising the set-point.