I'd posted earlier about getting a furnace properly sized and issues with running new 5 wire thermostat wiring. I appreciate all the helpful comments and I think that I've got that all sorted out.
Here is my next dilemma. I'm replacing a huge old updraft furnace with a 95% efficient furnace which is much smaller dimensionally. The plenum has an A coil for an old AC unit that I only use a couple of days a year. Contractor #1 said I should reorient the A coil 90 degrees which requires extensive sheet metal work and added expense. Contractor #2 said the whole plenum should be replaced with a factory unit with a new coil installed. Contractor #3 said he would just make a funnel shaped adapter to go from the top of new furnace to the bottom of the old plenum.
I want the furnace to function quietly and efficiently while heating but in the AC mode, I'm not really concerned because it is so seldom used. I'd appreciate any thoughts on how to make this decision. Naturally, I want to minimize my costs, but I don't want to do something I'll regret later.
Thanks in advance for your thoughts.