We are looking to installing Geo in our existing home in central Iowa and are looking for help. Our house is a walk out ranch with 1980/sq ft on main level and about 1200/sq ft finished in the basement. We currently are on LP which fuels the furnace, 2 - 40 gal water heaters for hot water and an other 40 gal water heater that heats the radiant heat in the basement. The two options we are looking at are as follows. 1) Forced air, 5 ton Climate Master two stage with a 6 ton loop field with a desuper heater. If we went this route we would do forced air up and down and not use the radiant heat. The reasoning for not using the radiant (on LP) is that the installer is afraid it would want to take over and the Geo and would not run as desired. *Issues: Would I regret not using the in floor heat? With only having one zone, will the basement be freezing in the winter? 2) Water to water, 5 ton Geo Comfort with a 6 ton loop field with a desuper heater. If we want this way we would have forced air up and radiant down. *Issue: Costs more and is less efficient(30% less efficient?) Questions: What option would you go with? Is the unit over sized? Is the 6 ton loop field over kill? What are your thought on a air to air exchanger? Humidifier? Are the quotes reasonable? The estimate is from a guy that I have heard many good thing about and has been installing Geo for over 15 years. From what I get from him is that he likes to over size the loop field often because the unit will be more effieciant. Thoughts? He thinks I should go with the water to water option because then I will have to zones--forced air up and radiant down. I will add the estimates in the morning when I can scan them in.