Figured it was easier to ask all 3 questions in one post.
Just bought a 3000 sq ft rancher (E.Tennessee) with an American Standard Freedom 90 2-stage propane furnace that is performing well....other than it's expensive to run (propane is $2.79/gal here).
So i got some estimates.
1- Nobody can seem to figure out the age of this unit. Can anybody tell from the photo?
2-Should I keep the furnace and add a new heat pump, making it dual fuel, or get a completely new unit (dual fuel hea tpump/propane)? Keeping the old furnace + new heat pump has been suggested by 3 installers.
3- I have an 8kw standby generator being installed soon. How complicated is it to run the propane furnace(emergency heat) of a dual fuel with a generator? The HVAC folks who have given estimates are not well-informed on this.