Furnaces less than 60,000 btu qualifying for the tax credit?

[normnet]

What brands of furnaces less than 60,000 btu qualify for the tax credit?
Two stage preferred.

I need to do a heat loss study but so far I have been offered everything
from 45,000 btu size to 70,000 with nothing less than 60,000 which
qualifies for the tax credit.

Norm

[catmanacman]

is this heat only or is with a ac unit

[Freezeking2000]

http://luxaire.com/PDFFiles/411866-LCB-B-0509.pdf

http://luxaire.com/PDFFiles/411868-LSS-C-0509.pdf

[normnet]

is this heat only or is with a ac unit?

Replacing the heat, keeping the existing ac.

Norm

[classical]

What brands of furnaces less than 60,000 btu qualify for the tax credit?
Two stage preferred.

I need to do a heat loss study but so far I have been offered everything
from 45,000 btu size to 70,000 with nothing less than 60,000 which
qualifies for the tax credit.

Norm

Godman GMV90453 96% lifetime heat exchanger warranty

[dan sw fl]

Replacing the heat, keeping the existing ac.

Norm

Would a heat pump be of interest and a possible, sufficient system solution?

How old is the equipment?

You did not provide your locale.

[normnet]

Would a heat pump be of interest and a possible, sufficient system solution? You did not provide your locale.


Not likely, MN location.
-20 degrees not unheard of.
Have seen a few -40 degrees but dead calm.
-40 no different than -20 for house to car and car to work.



How old is the equipment?

The furnace to be replaced is 27 years old.
It is a Lennox G12D2E-82-6 with input of 82,000 btu.
The output is 55,760 btu.
A new 95% 60,000 would be 57,000 btu output but the old furnace could
be well over sized.
If their are any furnaces less than 60,000 btu which qualify for tax credit
I plan to do a heat loss study.
No Luxaire dealers in area.

The other option is a modulating gas valve.
The Rheem system would seem to be potentially the best as it
communicates with the furnace more than on/off hopefully adjusting gas
valve based on temp differance from set point.
The Rheem however doesn't qualify for tax credit.

The York uses a standard stat and calculates when and how to run.
I think this would be 2nd best to actual temperature measurement and
rate of fall a dedicated stat could provide.

The Lennox modulating furnace uses a standard 2 stage furnace with 2nd
stage determining when to go to high fire.
This would be at 2 degree's less than set point, a dedicated stat could do better.

If I were to design a modulating gas valve thermostat (no way I will because of dangers
with gas) it would adjust flame size by use of a PID (proportional integral derivative) control.
See http://www.parallax.com/dl/docs/books/edu/ic.pdf (http://www.parallax.com/dl/docs/books/edu/ic.pdf) page 145.
P is for proportional adjusts flame size by percentage from set point. 0-100%
I is for integral increments flame size over time to ensure completion of cycle.
D is for derivative dampens flame size to prevent over shoot and hunting.
The formula could also be self learning by reading for several minutes after completion
for over/under shoot and correct factors in the PID.
The stat sensor would be located outside the enclosure to get most accurate reading.

[wahoo]

I don't know of anyone making a 95% plus furnace smaller than 45,000 BTU, however you should be able to find plenty of these units! Yes, I'd have a heat loss figured, and go from there! Or you could go with the 70K and get a two stage unit!

[clarkie]

The Federal Tax Credit is based on AFUE ratings of any given furnace, any manufacturer and not on the btu capacity of that furnace. It must be rated at least 95% Annual Fuel Utilization Efficiency, to qualifly for the Federal Tax Credit.