Insulating central heater tube and poor hot air pressure

[Haveacamper]

Hi guys,

i fitted my propex heater into the sotck system hoping to get windcreen heat when driving. however, i've got two problems: barely any heat, and barely any flow.

1st - i dont have any insulation on my central heater tube that travels the length of the van. I was just wondering what people have used to insulate their central heater tubes as not to lose too much heat. obviously when driving the air under the bus is going to cool the heater pipe down tremendously without insulation - so is the water spray when wet

2nd - I have plumbed my propex 2000 into the stock heater system. i have piped it into one of the rear kick panel inlets and capped off the other as well as the Y pipe that the heat exchangers usually connects to. The thought was that i could get heat from the walkthrough and also up at the angel of the north and windscreen. However, there doesnt seem to be any pressure at all i have to check for leaks, but was surprised of the lack of flow. i appreciate you lose pressure over distance, but was seriously surprised how little flow i was getting. i could barely feel anything

NaFe

 

[Doris]

seen people use those thin foam camping mats as tube insulation.quite water proof and dense.about 6mm thick and a fiver a go.

 

[tomedwar72]

You can get Propex Thermoduct Ducting Insulation like this:

http://www.ebay.co.uk/itm/390270781074

It's a bit expensive though. I bought the same fabric to make my own:

3M Inner fabric:

http://www.carinsulation.co.uk/product/au2020-6_thinsulate_car_insulation_material

Waterproof / oilproof outer:

http://www.carinsulation.co.uk/product/black_water_resistant_engine_bay_specification_cover_material

If you are really worried about high temperature add this as an inner layer:

http://www.carinsulation.co.uk/prod..._faced_heat_insulation_for_boats_and_vehicles

There are plenty of other options of course...

 

[the_troupster]

seen people use those thin foam camping mats as tube insulation.quite water proof and dense.about 6mm thick and a fiver a go.

This is what I did. Then wrapped in plastic and gaffa taped together. Still holding firm 14 months on.

Jim