I recently got a new furnace for our 1200 sqft house in Denver CO. We are planning on adding a second story in a year and I was going to wait until we did that to replace the furnace. Then the furnace up and died just to mess with my plans. I got a 80,000btu furnace instead of a 60,000btu model in anticipation of the house getting a bit larger. What I didn't think through was just how much air the furnace now wants to move through the house.
I am wondering if it is acceptable in this situation to install a bypass between the supply and return as if the system was a 2 zone.