[TurboZamboni]

No a/c

[DocJhn]

Trane has great warranty and a 2 stage compressor in the A/C unit!

[Tijeras_Slim]

I have a Burnham boiler (hot water baseboard) that runs off propane. 1995 manufacture. Seems to do just fine up here in the NM mountains for keeping the place warm. The newer ones are probably more efficient, but I haven’t done the calculation of how long it would take to recover the cost.

[Sawdring]

In my experience most furnaces are the same with many interchangeable parts like White Rodgers boards, Fasco ventor motors, and GE blower motors. Usually the heat exchangers are built off site as well, so what you are paying for is assembly and warranty. Sometimes a furnace manufacturer will come out with something new and wondrous like the Lennox Pulse system. This one turned out to be mostly loud and difficult to service because the gas ran on different principles than the average tech was used to. So stay away from the experimental side of things. Also, the less gizmos and gadgets that you have in the machine the better due to the cost of replacing higher technology.

The number one thing you will want is for the unit to be properly installed. Most of the big boys in town will do a good job and a lot of inspectors in the metro area will know a good job when they see it. Although, inspectors don't check up on efficiency and proper set up.