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  1. #1
    Fireside Member
    Join Date
    Dec 2020
    Location
    Alabama
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    2021 3540 GK-R Heat duct

    Does anyone know that the 2" round duct supply's heat to? I am adding insulation to the basement and ran across this.. Lots of direct paths to the outside in the bottom of it.. Adding 2 filters to the heat return as well.
    Last edited by FreddieD; 02-23-2021 at 01:20 PM.
    2021 Grand Design Solitude S Class 3540 GK-R
    2021 Ford Super Duty Crew Cab 4X4 DRW 6.7 LWB F350
    Curt A 20 Hitch

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