I have a 5400sqft house with 3 thermostats driving 3 natural gas furnaces and 2 air conditioners. System is loud, works poorly, and is expensive to operate. Outdoor temps from 30 - 110 degF. Can you help?
I do not want the system connected to the internet.
Currently paying $0.36/kWh for electricity and $2.80/therm for natgas.