Hello - New guy here to the forums...looking around here for some time and the information has been very useful. I have three quotes to install a full Geo system in my house. House information: 2100 sq. ft. 2 story colonial built in the middle of a farm field. Built in 2001 2.5 car attached garage Standard 2x4 construction Propane heat ($2.10 per gallon now....crazy!!!) (propane is costing about $3k annually) Propane heated hot water 3 ton AC Unit. Contractor #1 Measured the whole house and windows. Uses GeoComfort systems Calculated Design Heating Load - 63,888 btu/hr Calculated Design Cooling Load - 42,973 btu/hr Quoting a GeoComfort GXT 4ton Compass Series Contractor #2 Measured some of the house Asked many questions about the home Did not provide the calculated heating load Quoting Water Furnace Series 5 2-Stage 4ton Contractor #3 Did not measure the home Asked many questions about the home Did not provide what he used for calculations Quoting ClimateMaster 2 stage 5 ton heat pump. All contractors came back with a horizontal loop field (I am on 5 acres). 10kw heat strip. I am trying to figure out if the 5 ton is too big for what is needed. Contractor #3 stated that the calculations were on the border between 4 and 5 ton and the 5 ton would be more cost efficient. Thoughts?? Input??? Questions??