On Thu, 24 Jan 2008 07:08:02 -0500, "Joseph Meehan"
wrote:

It sounds normal to me. The ideal system is the one that will take a long
time to increase the temperature. Oversize units will heat fast, but they
also will be less able to maintain any specific temperature and will be less
efficient. It sounds like yours is good.

"John Smith" wrote in message
...
I have a 2,000 sqft house. I suspect the heating system (Trane) is
not working properly because it takes one hour to raise the
temperature four degrees.

The service man from the company which installed the unit last
summer told me the system works fine. He said the supply air is
105 degree and return air is 71 degree and usually he only gets
101 degree for supply air.

I don't have much experience with gas heat and wonder if a supply
air of 105 degree is normal. Any thoughts?

As usual mr. Meehan is wrong. If I had a model number I could tell you
what the temp rise should be but the usual temp rise is about 70
degrees which yours is nowhere near if your readings are correct.