Spent some time with HVAC-Calc, a tape measure and the house to do a Model J. Took some time, but not all that difficult. It's an educational experience for sure.
Attached is the report which is pretty accurate...I hope. We plan on replacing windows within the next year, but didn't include them. They can only make the house 'tighter', I suppose. If anyone would care to help us out and give a size recommendation, we'd sure appreciate it. If there's anything that looks out of line, please let me know.
Thank you in advance,
House Manual J Detail_12-20 Final.pdf