The duct blasting tech noted that since we have 9' ceilings on all three floors he thought that could be a contributing factor in raising our neutral pressure plane. \
Also, since the duct blaster tech was surprised to hear this I thought it may help here. My home doesn't have any house wrap, no TyVek, just brick veneer front with vinyl siding on the other three side, then under that OSB.
I don't know if it matters, but our house is actually 5,000 sqfeet. I mentioned it to the audit company but she said it just needed to be a rough estimate.
I'm mentioning it now since I'm grabbing at anything!
She offers a test out, which I was going to take advantage of, I really wanted to do it at the very end.
But at this point I should have her out again.
My downstairs unit is a 3.5 ton A/C 100BTU furnace (80% efficient).
My upstairs is a 2.5 ton heat pump, not sure of the electric coil BTUs.
When they come on though it's nice and toasty, but all I see is dollar signs!!!
How do you know ACTUAL furnace efficiency?
Monthly electric and gas usage.
It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE
Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities