I'm interested in c/a I heard about a water cooled model which sounded good any feedback on them or where I can get more info? I have about 3,000 sq ft but only the up stairs needs it . It's a raised ranch in Mass, with forced hot air.

I was replacing a standard mechanical thermostat in my house with a programmable electronic one, but there were more wires attached to the old t'stat than the new one accepts. Specifically, I have a B and an O wire that don't attach to the the standard R, G, W, Y terminals on the new t'stat. I tried just capping them off and installaing as if they weren't there, but the furnace wouldn't start after this. I know the standard thinking is that B and O wires have something to do with a heat pump system, but I think my house just has a standard oil furnace and central air conditioning system in a two-zone configuration. Another source tells me that the B and O wires control the electric heating and cooling dampers, which makes more sense. The t'stat is a cheapo Lux TX500, but even the more expensive ones I looked at didn't have B and O terminals. Is this a common problem, and is there a way to wire this so that my system will work correctly? Any help would be appreciated.