Looking for suggestions as to what to do. Live in Calgary, Alberta, Canada and looking to install central air for the 2-4 months we have that can be somewhat hot.
2300 sqft walkout basement 2 story house, 2 years old south facing and no fancy energy efficient windows.
Had 2 contractors recommend a 4 ton (max size based on furnace)... which sounds crazy and then note that 3.5 would work. One contractor go with 3.5 is and then another 2.5-3.
Was going to go for the 3.5 most of them seem to recommend till I realized I am limited by my 16x25x1 furnace filter size.
Option 1: Move to 3 ton.
Option 2: Move to 3 ton with 3.5 ton sized evap. coil.
Option 3: Stay with 3.5 ton and increase size of filter opening to 20x25 for $200.
I am leaning to Option 1 but contractor scaring me saying if it doesn't get cold enough because of it don't be calling him.... his prices and reviews seem good from what I can find online and why I chose him. No one here would be willing to do a correct load calculation as it takes too long....
Thanks for your help!