Re: Newer Heating and Air Conditioning Equipment

[Guest guest]

Hi Barb,

Many of the new air conditioners and/or heat pumps air handlers come

with a variable DC fan motor when has infinite speeds. My Lennox I

bought last year has this and their top of the line thermostat can

also control humidity at the same time. Problem is it only goes

down to 45% which would be OK if its 45% matched up with my own two

humidistats which read 8% higher. Now I put a wet paper towel under

my $9000 top of the line heat pump thermostat/humidistat to fool it

into thinking it is more humid, nice huh.

The furnace man who sold me this told me about a $70. controller

which can slow any old ordinary AC furnace fan down.

There are also companies which make a coil bypass which diverts the

hot freon to the return side of your furnace to use the system as a

whole house dehumidifier.

I would try the $70 controller first. A slow moving fan will remove

a lot of moisture. A fast fan will also remove, but it will

evaporate more moisture back into the air.

BTW, my Lennox Heat Pump has their Pure Air System which has four UV

lights that also shine on a titanium grid. No ozone either.

Fletch

[Guest guest]

Thanks Fletch. I will look into it. The air feels better inside when

blower is constantly pulling in fresh air and I have had to set it to 'auto'

because the house was getting too humid. I don't want to buy a new furnace

or ac since I plan to move in a year or two. BarbB

----- Original Message -----

From: " fletch_82000 " <fletch_8@...>

> Hi Barb,

>

> The furnace man who sold me this told me about a $70. controller

> which can slow any old ordinary AC furnace fan down.

>

> There are also companies which make a coil bypass which diverts the

> hot freon to the return side of your furnace to use the system as a

> whole house dehumidifier.

[Guest guest]

An HVAC guy told me to run the fan on the air all the time to keep air

moving in the house, which was supposed to help with cooling the 2nd floor

better. We have closed most of the vents on the first floor to try and get

the air to move upstairs. I didn’t put the two together, but it started to

feel “moist” in the house, even with the A/C on. So, I went to buy one of

the portable humidity readers and set it in on the first floor. We have an

open floor plan. I was surprised when it read 51%!! I went out and bought

a dehumidifier for the 1st floor level too. We already have one running in

the finished basement. It would get down to 30% and then I would turn it

off and next thing I knew it was back up to 49% so I would turn the

dehumidifier back on. After reading these posts I did an experiment with

the HVAC fan. I left the dehumidifier on overnight and got it down to 20%

on the 1st floor. Then I turned the HVAC fan back to auto. It has remained

at 20% all day.

So, my experiment showed that running the A/C fan on the thermostat on auto

produces LESS humidity than leaving the fan on all the time.