And as I am going to call in the furnace technician, I would like to explore the option of changing the circulation pumps from the 26-116's to 26-99's for less electrical load. Also have them change the wiring to those pumps from the current setup (which seems to be both pumps on for Stage 1 and Stage 2, (contrary to what the Waterfurnace Installation Manual shows which is 1 pump for Stage 1, 2 pumps running for Stage 2). Earlier (2-3 weeks ago) I measured flows and came up with between 11-12 gpm which people here thought low. And that would have been with the 2 99-116's running, though earlier this week while the pumps were still working, I listened in with a stethoscope and thought that possibly only one pump was running (based on perceived volume of the noises heard between the two pumps. So is there risk by changing the pumps as I am contemplating, and changing their setup so one pump runs in 1st stage instead of currnetly 2 pumps, that I make things less efficient?