Blown air hose / pipe

[Jev88]

Hi all.
Blown air pipes on an old Truma / Fanmaster system. Are the pipes a standard size or do they vary?

I suffer from two pipes exposed under the MH over 6 foot each. I was planning to lag them but now going to experiment with directing them within the MH cupboard next to the Fire/Heater and vent forwards and backwards down the main accommodation corridor ....

Do I really need warm air to toilet, vanity area, walkway, under table and shower?
(Don't tell Crazy Cat Lady she loves the warm air in the shower )

 

[Lenny HB]

If they are under the Motorhome they should be inside a larger black pipe that gives some insulation. If they are the same pipes as inside it has been incorrectly installed.
Yes they are normally a standard size 65mm dia, the outside pipe with the insulated sleeve is 85mm dia and expensive at iver 50 quid for 2m.
There is also a 30 or 32mm pipe for feeding around the back of seats, water tanks etc.

 

[RogerThat]

Do I really need warm air to toilet, vanity area, walkway, under table and shower?

I did! Made such a difference too.

Details, pics, inspiration, etc: https://www.motorhomefun.co.uk/foru...n-air-heating-system-pic-heavy-thread.147127/

 

[Jev88]

If they are under the Motorhome they should be inside a larger black pipe that gives some insulation. If they are the same pipes as inside it has been incorrectly installed.
Yes they are normally a standard size 65mm dia, the outside pipe with the insulated sleeve is 85mm dia and expensive at iver 50 quid for 2m.
There is also a 30 or 32mm pipe for feeding around the back of seats, water tanks etc.

Yes they are black under the MH. Thanks though as didn't know this was special ducting.

 

[Jev88]

I did! Made such a difference too.

Details, pics, inspiration, etc: https://www.motorhomefun.co.uk/foru...n-air-heating-system-pic-heavy-thread.147127/

Thanks for the link.
I have the heater on nearside and all my vents are off side! Hence I am wondering if I can improve efficiency and effectiveness by not going "underground" but I have water tank between fire and the handy nearest bench seat that is mm perfect fit so no way past it other than across ceiling or under MH again!
Bit of poor design in an old Autocruise that I am generally happy with design-wise.

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[Lenny HB]

Truma Insulating ducting for blown air system - 2m length | Truma Code: 40681-00 | Spare Parts for Truma Blown Air Heating | Leisureshopdirect

Buy a Truma Insulating ducting for blown air system - 2m length | Truma Code: 40681-00 | Spare Parts for Truma Blown Air Heating | Leisureshopdirect

www.leisureshopdirect.com

 

[Crazy Cat Lady]

Do I really need warm air to toilet, vanity area, walkway, under table and shower?
(Don't tell Crazy Cat Lady she loves the warm air in the shower )
[/QUOTE]

Ummmmm......of course WE need warm air in the shower etc.......you’ve been caught out Jev.........