Mine's a Water Furnace too. They are made just up the road from me and have a good reputation.

I've had a few problems recently (freon leak) after about 10 years but overall it still runs pretty good. The repairman did say the compressors can go bad after about 10 years and it's about $1400.00 to replace them. However mine is still going strong.

One neat feature is if you have any problems the circuit board has different lights lit up depending on what the problem is. I had a problem one day and called up a representative. She asked me what lights were lit up and sure enough she told me what the problem was and I was able to retify it right away. It was a small clog in a drain tube from iron bacteria.

I believe geothermal is the most efficient heating and cooling there is.

If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.