I’m looking to replace my 30 year old international comfort 80% natural gas 80,000 btu and older 2.5 ton ac in Lafayette Indiana spring after next. Converted my 200 sq ft 3 season room into a proper addition. Brings total square foot to 1600.
Wondering if it’s worth getting variable ac and multistage furnace. Did a quick manual j and attached results. Seems pretty close to what I’e experienced. Furnace runs about 90% duty cycle at -10*F. Wondering what load calc you guys use. I will be moving utilities to new room (about 5’) and replacing 12” flexi return in attic with galvanized. Also plan on moving condenser to north side instead of southwest. Lineset run would be about 30’ with 4’ height increase.
Wondering if it’s worth getting variable ac and multistage furnace. Did a quick manual j and attached results. Seems pretty close to what I’e experienced. Furnace runs about 90% duty cycle at -10*F. Wondering what load calc you guys use. I will be moving utilities to new room (about 5’) and replacing 12” flexi return in attic with galvanized. Also plan on moving condenser to north side instead of southwest. Lineset run would be about 30’ with 4’ height increase.