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Thread: Size of Heat Pump system advice
11-25-2010, 02:25 PM #1New Guest
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- Nov 2010
Size of Heat Pump system advice
Trying to get some recommendations to take advantage of the $1,500 tax break before it expires with a 15 Seer system.
Present System 20years old(comfort level is good): Lennox Air Handler CB19-41-2P 3Ton ; Supply/Return duct sizes are 20"x10"
Heat Pump: Lennox HP18-411V-8P
House type: split foyer 2500sq/ft living space
Climate: Baltimore / Washington area of Maryland
I don't want to change the present duct work or design of the system.
I have gotten suggestions varying from 3 to 4 ton ; but the 4 ton recommendation did not measure the duct work size.
With the newer units, would a 3 ton unit be better than the present system?
Thanks for your input !
11-25-2010, 02:30 PM #2
3 tons is 3 tons. But if the oldie was running reduced capacity due to low refrigerant level, dirty coils or worn compressor, you can notice an improvement with a new unit of the same size.
We find VERY few homes have enough duct system for what they have now let alone going 33% bigger. So if anyone suggests bigger they better take a good look at everything to prove it can be done. Otherwise you are spending more and gaining little. There's more to it than just 1 duct. The entire return & supply system is in play.