Ideal temperature rise?

[cturman]

Anyone want to give me opinions on the ideal temperature rise in a gas furnace? My manual says 30-60 but is there a more ideal number for comfort?

[REP]

The reccomended temp rise is that which the furnace was designed for,to run safely.
I take the temp rise a few inches before the filter and a few inches beyond the first place the probe cannot "see" the heat exchanger.
So you want to be "in" the range suggested and for comfort you would like to be closer to the high end.Going higher than suggested will play havoc with the limits and "burn" out the heat exchanger eventually.

[pauls heating &]

i try to shoot for middle of range...a lil dancing room for when filter becomes dirty

[Milk man]

i try to shoot for middle of range...a lil dancing room for when filter becomes dirty

I agree.

[heaterman]

i try to shoot for middle of range...a lil dancing room for when filter becomes dirty

I think this is what most guys will shoot for. To close to the lower end runs the risk of condensation where you don't want it and to high will cause limit and heat exchanger issues if the filter starts to restrict air flow.

[cturman]

I put cheap dial thermometers in the plenums and just leave them there. Pretty cheap at Harbor Freight. My system was just installed and was running at about 55 so I upped the air flow a bit so now it is 40-45. Temperature at the vents is 105-110 so it feels warm. Velocity is high enough to feel the warm air but not rattle the vents.

I was just wondering if it would feel warmer running at 50+. This is the downstairs unit so I also want the air to blow a bit more rather than just drift out and stay at the ceiling.

The only reason I'm asking is we are having extreme cold weather in Texas. Not over freezing for 2 days and low of 17. This is extreme for Texas. I had a new unit put in last year and it is working fine just wondering if there is a way to make it feel warmer.

[612Rob]

I had a new unit put in last year and it is working fine just wondering if there is a way to make it feel warmer.

What kind of humidity are you maintaining?

A higher humidity will make it feel warmer. 35-45% is ideal.

[cturman]

What kind of humidity are you maintaining?

A higher humidity will make it feel warmer. 35-45% is ideal.

I don't know. I need to get a monitor. I have a humidifier in the upstairs unit but not the downstairs. I may get one for down stairs also. I was hoping the upstairs one would be big enough for the whole house.

[universaltech]

I put cheap dial thermometers in the plenums and just leave them there. Pretty cheap at Harbor Freight. My system was just installed and was running at about 55 so I upped the air flow a bit so now it is 40-45. Temperature at the vents is 105-110 so it feels warm. Velocity is high enough to feel the warm air but not rattle the vents.

I was just wondering if it would feel warmer running at 50+. This is the downstairs unit so I also want the air to blow a bit more rather than just drift out and stay at the ceiling.

The only reason I'm asking is we are having extreme cold weather in Texas. Not over freezing for 2 days and low of 17. This is extreme for Texas. I had a new unit put in last year and it is working fine just wondering if there is a way to make it feel warmer.

> 45 degree temp rise or lower means condensation in your heat exchanger heat exchanger. Condensation is only for 90% furnaces.

[cturman]

> 45 degree temp rise or lower means condensation in your heat exchanger heat exchanger. Condensation is only for 90% furnaces.

Furnace is 95% so it has a drain anyway. Gets a lot more flow than I expected.

[universaltech]

Furnace is 95% so it has a drain anyway. Gets a lot more flow than I expected.

Why didn't you say so then to begin with?