I'm about to replace our aging furnace and air conditioner with new units from Carrier. I have had multiple quotes from qualified vendors and have settled on the Infinity 96 2-stage furnace (58MVB) and a 2-Ton single stage Performance 15 air conditioner (24APA5). I'll be installing the Infinity control with a Carrier humidifier and HRV added in as well.
Here's my question - For slightly more $ I can either:
1) Upgrade the choice of furnace to the 3-Stage Infinity ICS (58MVC) paired with the single stage AC
2) Upgrade the choice of AC to a 2-Stage Performance 17 (24APA7) paired with the 2 stage furnace
I live in a 1300 square foot backsplit home located in the Toronto, Ontario area (built in mid 1960s), and our cooling season is comparatively less than the heating season. For this reason I'm inclined to upgrade the furnace over the AC. Also, our existing single stage 2 ton AC has served us well with reasonable humidity control.
I'm wondering what the community has to say? I'm basing my decision more on comfort than efficiency. Would a 2-stage furnace + 2 stage AC provide better comfort than a 3-stage furnace + 1 stage AC in my situation? Is the 2-stage AC overkill for my climate and size of home?