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Help me choose system for midsize new england house

RekonnRekonn Posts: 15Member
Hello, which of these two systems would you choose? I have a 2100 sqft 2 floor house built in 1928 with attic and basement in Arlington MA. I've had two contractors do manual J calculations, both came up with ~66k heating btu load. I plan to finish the basement (~900sqft) in the next year or two. Both options are very similar in price, so that's not really a factor.



System 1: AC + hydro air

First floor:

2.5 ton Carrier FV4CNF002 fan coil with ECM motor AHRI #3657139 and hot water coil in basement

Second floor:

2 ton Carrier FV4CNF002 fan coil with ECM motor AHRI #3657138 and hot water coil in attic

Two condensing units installed outside on plastic pad, Carrier 24ACC630A and Carrier 24ACC624A

Buderus GB142-30 condensing gas boiler, 96% AFUE

reuse existing indirect water heater

save cast iron baseray baseboards currently on first floor for when basement eventually finished





System 2: AC + furnace

First Floor:

80,000 BTU Trane XV95 Variable speed Furnace, XB14 3 ton Trane condenser, Trane 3 ton coil

Second Floor:

60,000 BTU Trane XV95 Variable Speed Furnace, XB14 2 ton Trane condenser, Trane 2 ton coil ( Furnace boxed in attic to keep insulated )

2410 April Air Filter

Model 400 April Air humidifier ( basement only)

Furnace sized for future basement zone

new 50 gal gas hot water heater
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