Last year at this time, I was unsure that I'd ever be able to start a thread like this, but here we are. All I can say is it takes a village!! This morning the temperature outside was a balmy 5 degrees, and the temperature in our dining room (where our disconnected thermostat hangs) was 70 degrees. Our new 7 ton 5 series Waterfurnace was humming away. Our Phoenix 80 gallon water heater which is both our back up heat and our buffer tank has been unplugged for 2 weeks and so is just acting as an unpowered buffer tank. LWT from the geo unit is 128 degrees...we can probably adjust that down once the DanFoss valves that we ordered have been installed on our 16 radiators, so that the geo doesn't have heat all 3 floors of our house to the same temp. (Note to installers: it matters what direction the water flows through the radiators when you install TRVs....our installer didn't know that and our flow is "backwards" on all but 2 radiators, resulting in a lot of rework). We are heating only with the hydronic heat, and will use the 5 ton Carrier split and SpacePak (and dining room thermostat) for air conditioning in the summer). We gave the 3 ton Carrier high temp unit away....there was nothing wrong with it except that it didn't fit into the plans for our ideal system. The pump pack is on it's way to ACES to be used for training. All is good! I have a lot to be thankful for, that's for sure. Should have the WEL up and running soon.