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Thanks for the advise. I did read where I would need to jumper U1 to RH in the installation manual. Presumable, I would also need to program the U1 contact to reflect that it is a variable speed...

Thanks. That looks like a very advanced unit... I'm going to order one today.

I live in Brighton, MI. I looked at the Honeywell wifi, such as the one sold at Home Depot, and it does not have a terminal for the "D", which I think is for the variable speed blower. Same goes...

Hello:
My Lennox G61 furnace was installed about 6 years ago, and has a Lennox 81M2701 thermostat. This thermostat has bid the dust... the front display is all messed up, and the furnace will not...