Chris, I just recently installed a pc9 with a propane conversion kit. I
like it. My clients really like it. They told me it was the warmest their
house has been in years. I also did a full duct repair and seal on the
home as well. I think that is key, installation. If you have a tight air
duct system and have an installer that takes the time to check the static
pressure on the return and supply duct and sets the gas valve with a
monometer, you will be happy with a York, Carrier, or any other high end
furnace.
Kevin