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  1. #1
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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

  2. #2
    Site Team Second Chance's Avatar
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    Could you post a photo? I'm not sure which duct you're talking about. There is a small duct going to the rear from the basement that terminates underneath the kitchen area to keep those water lines thawed.

    Be very careful adding filters. These RV furnaces are not made to use them and they can restrict airflow.

    Rob
    U.S. Army Retired
    Widowed and very happily remarried
    2012 F350 DRW CC LB Lariat PS 6.7
    2020 Solitude 310GK-R, MORryde IS, disc brakes,
    Sailun LRG tires, solar, DP windows, W/D
    (Previously in a Reflection 337RLS)
    Full time since 08/2015

  3. #3
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    Thanks, I plan on having a lot more filter spaces to try and keep the restriction down. The 2"Runs in the underbelly along with a 6" one as well, I assume that goes to the island.
    Click image for larger version. 

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    Last edited by FreddieD; 02-23-2021 at 04:20 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

  4. #4
    Fireside Member
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    I also noticed it "T"s and a 4 " goes up as well?
    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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