Hello all experts: I recenty bought a new Honeywell thermostat to replace my old GE thermostat. My heating system is using heat pump with multistage. How do I connect the wires? The exising wires terminals are: O R T G Y X2 B U W The Honeywell thermostat terminals are: C G Y O/B RC R AUX E L I took pictures but I don't see anywhere I can attach them. Please advise! Thanks/Ben

I'm going with a straight electric heat pump system. Seems like the air handler to go with is the 2/4TEE but I'm still undecided about the heat pump itself. I've been doing a lot of searching here and elsewhere online and know most of the arguments for and against these three (XL19i, Xl16i,XL15i) so don't need a rehashing of pros and cons of refrigerant type, dual stage vs two compressor etc .... but does anyone know definitively if the 16 and/or 19 qualify for the tax credit? It's kindof buried but found the docs on their website certifying the xl15i and others for the straight ac units but nothing on the other two. According to the specs on the govt site the xl19i might not actually qualify because the hspf is barely below the 9 threshold (even though the seer is highest in the line) but it seems like the XL16i should qualify. I'll be asking the dealers giving me quotes obviously but would be nice to get some feedback here as well. I realize that the tax credit is not big enough (compared to overall cost) to be the main thing when making the decision but the various other factors have me so close on these three that a few hundred bucks could swing me one way over the other. Question two is about the CleanEffects system. I read about that quite a bit yesterday and seems like it's a good system (even if it apparently doesn't spec out quite as high as Trane's numbers would indicate) but it's not cheap. So, would it be better to buy a standalone system that might be more effective plus won't put any load on the system? Lastly. Seems like the Trane thermostats aren't all the well thought of and a lot of people recommending the Honeywell IAQ. Since all of the rebates require getting a package with the Trane stat is it smart just to get the cheapest one they offer to qualify (for the rebate) and then either install the Honeywell after the fact or see if my installer minds just doing it when the system is being put in (assuming that doesn't violate any policies for them)? Thanks again for all of the help.