Heating Ducting

[DenisD]

In the thread on condensation on windows someone mentioned lagging the heating ducting. Any suggestions On my previous Bailey Monarch I used decorators poly coving covered with plastic sheeting but on the Champagne the run under the van is twice as long.

 

[GrahamSouthBrum]

On my German caravan the heating ducting underneath the van runs thruogh a larger size ducting. The gap between the two ducts is filled with polystyrene balls.

 

[DeliDave]

https://www.screwfix.com/prods/62194/Plumbing/Copper-Tube-Accessories/Spiral-Wrap-50mm-x-7-5m
I have used about 8 of these so far but it makes a hell of a differnce.Some bits I did in short lengths and secured with foil tap,sometimes i could get the ducting down and use a full roll Only had a 10mm overlap but it doesnt go very far.