Interpreting Trane Hot Air Furnace Specs ?

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Old 05-11-05, 04:30 PM
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Interpreting Trane Hot Air Furnace Specs ?

Hello:

Want to verify that my understanding of the following is correct, please:

In the Trane/American Std Hot air furnace brochures, they have model designations as: TUD 100 R9V3K

The 100 is apparently the heat size for the unit (it is not labeled with BTU, or anything else, though)

a. This would be for the heat INPUT, right ?

Then, there's a Stage 1 and a Stage 2 BTUH number.
This is obviously the heat OUTPUT as 80% of the 100 number gives the listed stage 2 BTUH number, so it seems to make sense ?.

b. Is it true that the furnace only utilizes stage 1, OR stage 2, and Never both together ?

c. BTW: shouldn't it be in BTU/H rather than BTUH ?

Thanks,
Bob
 
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Old 05-11-05, 06:04 PM
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XV80 VARIABLE SPEED DIRECT VENT GAS FURNACE
Model Height (in.) Width (in.) Depth (in.) Capacity Output (BTUH) ICS* AFUE
Upflow/Horizontal Stage 2 Stage 1

TUD060R9V3K 40 17.5 28 48,000 31,200 80
TUD080R9V3K 40 17.5 28 64,000 41,600 80

TUD100R9V3K 40 17.5 28 80,000 52,000 80

TUD080R9V4K 40 21.0 28 64,000 41,600 80
TUD100R9V5K 40 21.0 28 79,000 52,000 80
TUD120R9V5K 40 24.5 28 95,000 62,400 80
TUD140R9V5K 40 24.5 28 111,000 72,800 80

a. correct

b. correct
stage 1 is 52 KBTU, if thermostat temp can not be maintained at stage 1 output, then stage 2 80 KBTU is engaged (80% efficiency furnace)

Keep in mind this particular model has a 3 ton blower rating which may be important as far as Air conditioning air flow.
 
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