heehaw-- Somewhat embarrassing... for my brother's company: apparently the fellow that came out to look over the original installation somehow got "42" stuck in his head. The original compressor was rated at 24,000 BTU according to its model number, and according to my calculations (gpm, TD drop on the water loop) it was providining 23,990 or so.
I wanted something a bit larger....
I think the 30K unit will be just right.
A shame that the first installation had to be pulled out, but N/C to me; they made good on it. I was happy to hear that the 42K unit has already been sold. (It was never powered up at my house.)
At 1800+ square feet and heavily insulated (R-29 or 34 all around, I forget which), the design heat loss when my house was built was only around 22K BTU. Hard to believe, but when I ran out of wood the first winter (and the heat pump wasn't yet hooked up), one of those small tan electric garage heaters heated the whole house --and the basement-- at 17,500 BTU output.
Didn't shut off much

and the electric bill reflected that


, but it did do the job. I was amazed.
Now I suspect the house, after 24 years, isn't as tight as it originally was, but 42,000 was a bit much. I suspected this, but I've been out of the field for 20+ years, and didn't question it (too much).... My brother called a few days later to tell me to hold off on any further wiring, that it would be replaced with a smaller unit. He also questioned whether my 8gpm would have even been sufficient for such a large unit....
Hey, we've all made some classic boo-boos; what matter's is whether or not we own up to it and make it right. In this case, yep.
