I have had geothermic for 20+ years. and have had both a pressurized an non pressurized loops. Bot worked well, but i prefer the non pressurized, it has a reservoir tank that if it gets low lets more water in though i have never lost any water. With the pressurized loop if you lost even a slight amount of water you had to manually add it. My loops are 6 feet deep, and each side of loop is 2 feet apart in a single trench. for a 2 ton unit I have 2 250 feet long loops 20 feet part. I really like my unit, it is very economical to heat and cool with. One thing, if sized properly they are intended to hold temperature, not change it rapidly, so if you turn neat off or way down, then back up a fay or 2 later, it will be slow to recover. For a lot of good infl go to www.hydro-temp.com
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Today's Featured Article - 12-Volt Conversions for 4-Cylinder Ford 2000 & 4000 Tractors - by Tommy Duvall. After two summers of having to park my old 1964 model 4000 gas 4 cyl. on a hill just in case the 6 volt system, for whatever reason, would not crank her, I decided to try the 12 volt conversion. After some research of convert or not, I decided to go ahead, the main reason being that this tractor was a working tractor, not a show tractor (yet). I did keep everything I replaced for the day I do want to restore her to showroom condition.
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