Here is my dilemma: Per the heat calcs done I need about 56K btu of cooling and a max of 75 or so of heating. To be safe, some suggested a slightly larger furnace.
My current hot air furnace puts out a full 1 gph, or 139K btu gross and 111K net, after deducting 20% for efficiency loses. I also have a Lennox 5 ton heat pump
On the surface it would seem that I could use a far smaller and right sized unit, perhaps one that yields about 110K gross and 85K net. But.... there may be a problem, of course, that eludes me.
I have been told that a larger unit is needed to pump the airflow necessitated by a 5 ton heat pump/AC unit, which puts me n a quandary. To get the air volume I need I "must" install a too large unit and impliedly waste fuel, perhaps alot of it. If I go for a smaller unit then I might not get the air volume & flow req'd.
So, what have I missed? Any suggestions or ideas? Thanks to all in advance.