Temp rise on a furnace
 

What should the temp rise be on a Ng Lennox Dimension 93% 2 stage
furnace from return to just at the AC coil with new filter, clean
squirrel cage and all ducts open and on low fire of a 2 stage. Mine is
67 in 137 out a 70f rise. Isn`t that to high indicating it is oversized
for the ductwork. I thought 50- 60 was inline. It is a bit oversized and
I am looking at less Btus on a replacement. The Lennox supposedly was
sized correctly as return and supplies were added.

Temp rise on a furnace
 

"m Ransley" wrote in message
...
What should the temp rise be on a Ng Lennox Dimension 93% 2 stage
furnace from return to just at the AC coil with new filter, clean
squirrel cage and all ducts open and on low fire of a 2 stage. Mine is
67 in 137 out a 70f rise. Isn`t that to high indicating it is oversized
for the ductwork. I thought 50- 60 was inline. It is a bit oversized and
I am looking at less Btus on a replacement. The Lennox supposedly was
sized correctly as return and supplies were added.

The temp rise information should be listed in/on the furnace somewhere.
Greg

Temp rise on a furnace
 

This is Turtle.

Like Grego said the Temp. Rise should be on the furnace.

Also 70 degree temperature rise is very much on the top end of the
scale . i would like a 50 Temp. Rise or so for me but other opinions
may very.

TURTLE

Temp rise on a furnace
 

It says 40-70 on the door but it actualy may be 72 or so depending on
the return, I would like it lower, slower more even heat is better.

Temp rise on a furnace
 

m Ransley wrote:
It says 40-70 on the door but it actualy may be 72 or so depending on
the return, I would like it lower, slower more even heat is better.

reduce the firing rate...

Mark

Temp rise on a furnace
 

On 9 Dec 2005 12:58:55 -0800, "Mark" wrote:


m Ransley wrote:
It says 40-70 on the door but it actualy may be 72 or so depending on
the return, I would like it lower, slower more even heat is better.

reduce the firing rate...

Mark

BUT check the CO reading while and after you do it.
Bubba

Temp rise on a furnace
 

This is Turtle.

E-mail me at this e-mail addy and talk about this.

TURTLE