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  1. 08-21-2010, 09:37 AM #1
    Arthur Mroz
    Arthur Mroz is offline Regular Guest
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    New Furnace Sizing

    I purchased a 3500 square ft home in Dyer, IN and I have a contractor ready to replace my 140 000 BTU furance with a Trane 104 500 BTU furnace. The old AC unit tonage is unknown and this guy recomends a 3.5 Ton unit and a 4 Ton coil with a 4 Ton fan. The house is a 2 story, 5 bedrooms, plaster, no insulation with a Mansard flat roof. Also have a 1200 Square ft addition with it's own HVAC unit. All brick for the house and addition. Partially shaded with mature trees. Does this sound right?
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  2. 08-21-2010, 10:21 AM #2
    Arthur Mroz
    Arthur Mroz is offline Regular Guest
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    The new Trane unit would be 95% and the old unit was 80%
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  3. 08-21-2010, 01:24 PM #3
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    energy star
    energy star is offline Professional Member*
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    Get a two zone system
    Always here
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  4. 08-21-2010, 02:06 PM #4
    seatonheating
    seatonheating is offline Banned
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    Quote Originally Posted by Arthur Mroz View Post
    The new Trane unit would be 95% and the old unit was 80%
    Did he do a load calc?
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