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Thread: ATF: Mallard - Mallard M32 (2016) Heat Duct Routing

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    ATF: Mallard - Mallard M32 (2016) Heat Duct Routing

    Good Afternoon,

    Had to use heat last weekend and bunkhouse vent is decidedly cooler than others.

    Opened all access ports and found 3 large hoses exiting heater (to front door, under stove and bathroom), all without kinks.

    Also found 2 smaller hoses exiting heater and going underneath. Only one goes to bunkhouse (no kinks).

    We cannot find where the second heating hose runs too. Any clues?

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    Moderator danemayer's Avatar
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    Re: ATF: Mallard - Mallard M32 (2016) Heat Duct Routing

    If you have a sealed underbelly, there's probably a duct going there.


    Dan and Ann Mayer & fur babies Callie the Rally Dog and Cooper
    2011 Landmark Rushmore
    • MorRyde 8K Independent Suspension
    • 8K Kodiak Disc Brakes
    • Goodyear G114 17.5" tires
    • RV Comfort Systems Cheap Heat
    • MorRyde 33x90 Sliding Cargo Tray
    • Torklift Glowstep Revolution Aluminum Steps & Dirt Destroyer

    2014 RAM 3500 Laramie
    • Cummins 6.7 Diesel, AISIN Transmission
    • 4x4, Long box, Crew Cab, DRW 3.73
    • Sailun Terramax A/T 4S, 235/80R -17. 5 Tires
    • Hensley BD3 TrailerSaver Hitch
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    Re: ATF: Mallard - Mallard M32 (2016) Heat Duct Routing

    It is not just yours. It is a problem with mine as well as others on this forum. When I first took delivery I brought it back to camping world and to no big surprise they found no issues.
    2017 Heartland Mallard M32

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    Re: ATF: Mallard - Mallard M32 (2016) Heat Duct Routing

    Sealed underbelly = yes. What would this tiny hose heat up given the square footage of the trailer? Wonder if there is a way to reroute from underneath ?

    Second Q: there is an option to attach another hose to the heater, however, how would one be able to route it to the bunkhouse (going past the bathroom is the challenge.

    P.S.: I avoid CW service in Houston like the plague :-)
    2016 Mallard M32 (8600 lbs GVWR) - towing with 2015 Expedition King Ranch (9200 lbs tow pkg) - with Pro Series WD hitch and dual sway bars.

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    Moderator danemayer's Avatar
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    Re: ATF: Mallard - Mallard M32 (2016) Heat Duct Routing

    Quote Originally Posted by PeterS View Post
    Sealed underbelly = yes. What would this tiny hose heat up given the square footage of the trailer? Wonder if there is a way to reroute from underneath ?

    Second Q: there is an option to attach another hose to the heater, however, how would one be able to route it to the bunkhouse (going past the bathroom is the challenge.

    P.S.: I avoid CW service in Houston like the plague :-)
    The duct to the underbelly might keep the underbelly as much as 10 (F) above ambient temperature outside if you're running the furnace a fair amount.

    If you dig out your furnace manual that was in the blue pouch that came with your trailer, it probably has some installation information and that should give you an idea about whether there are unused connections on the furnace plenum. And yes, routing a new duct would be a challenge on any trailer. Much easier to do before the whole trailer is put together.


    Dan and Ann Mayer & fur babies Callie the Rally Dog and Cooper
    2011 Landmark Rushmore
    • MorRyde 8K Independent Suspension
    • 8K Kodiak Disc Brakes
    • Goodyear G114 17.5" tires
    • RV Comfort Systems Cheap Heat
    • MorRyde 33x90 Sliding Cargo Tray
    • Torklift Glowstep Revolution Aluminum Steps & Dirt Destroyer

    2014 RAM 3500 Laramie
    • Cummins 6.7 Diesel, AISIN Transmission
    • 4x4, Long box, Crew Cab, DRW 3.73
    • Sailun Terramax A/T 4S, 235/80R -17. 5 Tires
    • Hensley BD3 TrailerSaver Hitch
    • Garmin RV760 GPS


    Is club membership right for you? Click here to learn more

    Check out our Owner-written User Guides and Troubleshooting Guides

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