I am looking at a near future upgrade/redesign of my system and wanted to get your opinions on it:
House is 2500 sq feet. two story, 40 yr old. pretty leaky, in atlanta area
3 ton gas furnace in crawlspace and 4 ton condenser outside ( I know it's mismatched I would assume it has been setup this way due to lack of space in crawlspace - original 40 yr old furnace is still there rusting)
current system is about 10 yr old - Goodman
duct work is all aluminum mostly insulated with a couple of runs on outside walls. Mostly in crawlspace
each duct seems to split and go to one room downstairs and then way up into one room upstairs. So each room upstairs has a separate duct.
return vents are in every room as well.
Current issues are:
* 2 bedrooms upstairs get very little air flow (farthest from the furnace and smaller furnace???)
* several vents have varying levels of heat (probably insulation)
I am considering the following options:
1. Put a new heat pump + air handler in attic and run new duct runs for 2nd floor. Close off old ducts and effectively split the system in two zones. One upstairs and one downstairs. 2 ton unit should be fine for upstairs and would replace old ac condenser with 3 ton unit and effectivly match up the furnace to 3 ton for the first floor? I would also need to do some electrical work to support the 2nd system.
2. upgrade to dual fuel - which brings up another question. How hard will it be to upgrade? I have not been able to find exact steps. I know that I would need to replace condenser with heat pump, new thermostat..anything else? Then upgrade to zoning via someone like arzel. about 4-5 zones using current ducts. this is new option I have not figured out costs yet. Advantage of this option is reuse of existing ductwork, more control via zoning. I would probably end up getting 4 ton heat pump and plan on replacing 3 ton furnace with 4 ton (hopefully newer version are smaller so they would fit. or going away from gas altogether??
Thanks a lot in advance.