Hi, newbie here hoping to get some guidance on options I'm looking at for my in-laws house. They currently have a Goodman 92% AFUE 60,000 BTU furnace which has worked well with no issues the past 12 years. They also have a window AC unit that we installed for them about 10 years ago since the Summers in Seattle are fairly mild and didn't warrant installing central AC with their new furnace back then. The house has daylight basement so ~1600ft2 of conditioned space. The window AC unit is undersized now especially in the past couple of Summers where temps got over 90deg for a couple weeks and I'm sure that trend will continue so hence needing to explore more adequate cooling solutions.
Option 1: Get a 2.5 Ton 14-15 SEER Heat Pump and a 2.5 ton upflow Cased Coil to sit on top of existing furnace.
Option 2: Get a 2.5 Ton 13-14 SEER Condenser and a 2.5 ton upflow Cased Coil to sit on top of existing furnace. Should be cheaper than HP in option 1.
Option 3: Keep existing furnace. Get a 24,000 BTU mini split ductless multizone system(master bedroom and main living room). Should be cheaper than option 1 & 2. Wall air handlers might be eye sore though on the interior walls.
Wanted to run this by others more versed in residential HVAC for a sanity check to see what the consensus was and get suggestion for other options but limited budget will be a main factor for the retired in-laws. I've plugged in their room by room load numbers and calculator spit out below:
Total Btu's Cooling = 25076
Total Sensible Load = 24076
Total Latent Load = 1000
Total Btu's Heating = 31855
Option 1: Get a 2.5 Ton 14-15 SEER Heat Pump and a 2.5 ton upflow Cased Coil to sit on top of existing furnace.
Option 2: Get a 2.5 Ton 13-14 SEER Condenser and a 2.5 ton upflow Cased Coil to sit on top of existing furnace. Should be cheaper than HP in option 1.
Option 3: Keep existing furnace. Get a 24,000 BTU mini split ductless multizone system(master bedroom and main living room). Should be cheaper than option 1 & 2. Wall air handlers might be eye sore though on the interior walls.
Wanted to run this by others more versed in residential HVAC for a sanity check to see what the consensus was and get suggestion for other options but limited budget will be a main factor for the retired in-laws. I've plugged in their room by room load numbers and calculator spit out below:
Total Btu's Cooling = 25076
Total Sensible Load = 24076
Total Latent Load = 1000
Total Btu's Heating = 31855
source https://hvac-talk.com/vbb/showthread.php?2222817-Furnace-A-C-options&goto=newpost
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