Cab heating to habitation heating duct?

[JonnyWilson]

I’ve had a right good search round on Google and here and can’t find anything so if I’ve missed it please let me know.

We have a 2017 Burstner PVC conversion with Truma blown heating that all works well but could be better with a few tweaks. The Truma has ducting all over the habitation area and even two outlets under the front seats to attempt to heat the cab area. These however are not near enough to the windows to do any real job of de-misting them as I’m sure everyone’s aware.

My thought was to try connect one of the footwell cab vents (passenger side ideally as that’s nearest the Truma ducts) to the habitation outlets under the seat. This might then direct the heat from the Truma heater through the cab vents and also when driving it might send some heat further down the van quicker than just the cab vents.

Anybody got any thoughts on this, I know people do this when they install a secondary habitation heater like a Webasto and just plumb it into the existing ducts.

 

[ivorantony]

I have a A class so probably won’t specifically answer your question, but we use a internal thermal screen covers that dramatically reduces condensation in the cab area plus I can clip in a thermal curtain to the drop down bed to stop all the heat disappearing to the back when driving in very cold weather,
Plus I have plumb in a additional water heater behind the cab seats running from the engine coolant but is only used in sub artic temperatures,

 

[EuroTrotters]

Age old problem.

We use a tan heater in our a-class on hook-up.

Added an adapted vent from truma for use on gas.

 

[JonnyWilson]

As we’re off tomorrow for a few nights in Ambleside I’ve cut an old Henry hoover vac pipe down to attempt my linking of the two systems. The sucky bit fits inside the passenger foot vent nearest the engine. I think as long as the cab heater is set to feet and front windscreen it should work. Then when we park up change to recirculating air to close the outside flap so the Truma sends some heat to the feet and front windscreen. It’s only cost an old hose so I’ve nothing to loose yet!