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What if pro wants to use existing size hvac?
We have a house we inherited and it is time to replace the hvac-32years old Rheem.
The ac side is 2.5 tons and works very well at cooling the house all summer long The natural gas furnace is 120,000 btu "effective output".
I think the furnace is too large, although it warms up the house nicely. I have used the slant fin app, US boiler, and Alpine home air calculators and the heat loss is around 55,000/hr across the board. The house is a single story ,1950 brick ranch with a full unheated, unfinished basement., @ 1000sqft. In living area
When, I start calling for quotes, if the estimator wants to use same size that is there, should I go with it because I know it will work?
The cost of a 70 kbtuh output furnace vs 120k is negligible. But the long term operating costs arent.
What should I do?