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QUESTION:I'm getting ready to replace my gas furnace with an 80%, two-stage model.
How do I determine the size required?
ANSWER: Have your contractor do calculations to determine the proper size.
Expect to pay for their time involved, it's part of the process for
getting a correctly sized unit. There are many answers to that, but only two good ones.
If you are sure the current one is right, then get another with the same
OUTPUT. If you are not sure the current one is right, then you need a pro
to come in do all the needed measurements, plug in the numbers and come out
with an answer.
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