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todde278's avatar
todde278
Explorer
Jun 14, 2015

Adding furnace vent in bathroom

I recently bought a 2015 Coleman 314bhs travel trailer. For whatever reason they do not put a furnace vent in the bathroom. On our first outing the bathroom was freezing if the door was left closed.

My furnace sits about 5' away from the tub. I was able to route some 4" flexible ducting from the top of my furnace, behind some drawers and under the bathtub where I plan to put a dampened vent into the paneling below the tub. I plan on using one of the knock outs on top of the furnace for connection.

Question is the flexible vent sits on top of water lines under my tub and will be about an inch away from some electrical cable for the furnace. I know the furnace puts out very hot air but is it a concern that it could melt anything? Any other concerns I should have about doing this?
  • A furnace vent in the bathroom will positively pressurize your bathroom and will force moisture and other "fumes' out into the trailer. I would open the roof vent some and turn on the fan to draw under the bathroom door from the warm trailer space. The air will exhaust but the bathroom space will warm up.
  • If your air in those ducts got hot enough to melt anything it would melt the cheap duct itself. My only concern would be either rubbing holes in the duct or chafing a wire. I would make sure the duct doesn't move.