I filled out their dealer locator form and someone contacted me just now. I've had 3 watersource guys out to the house to give estimate. I'm debating about having a DX guy come out also. It seems people are pretty negative on the DX. Here's some things he said:
1. Even though the posted docs on their COP % show 3.6 or lower, their actual COPs are five or higher. He says my ground temp is 51 degrees so he says I can get a 5 COP at that temp. He says DX can be %25 more efficient, less pumps, etc. He says their COPs are hurt by the criteria used to test COPs, that the testing is more favorable to watersource since the testing agency or company requires the water to be 32 degrees, which is why DX shows COPs of 3.6 instead of 4.6.
2. Warranty on loop is 20 years. I believe watersource loops are 50 years? He said they haven't had a loop leak since 1980. I said why not warranty it to 50 years then like watersource? He didn't have a very good answer to that.
I'm debating if I should even have someone come out. The 20 year loop warranty is a deal breaker, right? Is what he says about COP's correct?