In the final stages about to sign a geothermal contract.
The one last issue is how much additional ductwork and if it will make the home more comfortable.
With a 2 stage geothermal, there will be some times where it will run on second stage. Now there are adjustments the installer can make over a range of CFM blower speeds. I thought that for the heat load needs of my house for all but 12 days a year I would not need auxillary electric heat with a 4 ton unit.
But with a 4 ton unit shouldn't I need to have about the equivalent of 16 ducts?
I am upgrading a minimum of 2 extra ducts to 13, but thought that I would benefit by one or 2 more.
I was thinking the furnace could deliver more BTUH if I had more ducts, right?
But the installer said if he had to increase the blower speed, the air coming out would be cooler.
Where is the tradeoff here? In practical terms would there be a greater ability to maintain the goal temperature of 70 degrees in cold weather with a higher blower speed and more CFM delivered to the entire house, but otherwise keeping the size of the furnace, compressor, and loop size held constant?