A. Two window a/c units and a woodstove. Fair warning, I'm sitting here with the Climatemaster down for over 3 weeks, yet comfortable with two small, cheap window units, and trying to decide whether to yank out my 8 year old Tranquility 27, and have a local contractor put in a new conventional unit. That can give you a poor outlook. I decided to put the Geo in due to the hype and rebates when I started construction back in 2009. I chose Climatemaster because I live just about 60 miles from their factory in OKC. Surely, that would be a good thing? No. (key factor: very rural area) It was OK for awhile. The installer had a man working for him that was excellent, and responsive. He took care of the unexpected poor reliability the first 3 or so years. He argued with CM when the ECM module in the 3 month old system went out in August, and CM told him it would take 10 days to get the part. He later was able to get them to extend some warranty when the coil cracked a year or two later. Sadly, this guy moved off to better things, and the company he worked for them became unreliable. I located a second company that handled the yearly run capacitor failure, and managed for a few more years. They fixed the almost $1k electronic issue that resulted from a close call with lightning. Now, they can't seem to keep on anyone capable of servicing CM. 60 miles away, yet no one can work on it. The times we've talked with CM have been bad experiences. Mostly they ignored us. Right now, the issue is the unit won't operate in stage 2, and is losing 410A. They thought it was the "rectifier" which seemed to have a short. Replaced, but still no stage 2. Attempted to charge system, but the output air temp was still 79. Still unresolved. So, I'm venting or ranting, obviously. It may sound like a hatchet job, but its the reality. Without a woodstove and 2 window units, we'd have been in bad shape. I've heard techs say that with Geo units they seem to work forever or never. I must just be a lemonhead. I probably cannot answer a bunch of technical questions to anyone's satisfaction. I will say then when its working properly, we love the thing. Quiet, effective, comfortable. Its a shame. My purpose with this is just to put the experience out there. When I made the decision to go Geo, I read these boards for info. I just hope someone in that position may run across this, so as to be fully informed of what could happen. I consider the CM to be my worst mistake in 30 years of home ownership. Living in a rural area has made this much tougher, also.