Eberspacher Ducting

[spidy]

Can anyone tell me where i can buy some (4 meters) of 100 mill ducting fof my heater as mine has a soild steel pipe which has been glassed in where it goes through the bulkheads and it stinks when it gets hot (very scary i keep turning it off, I dont like fire ) AND what do i insulate it with, all advice greatfully recieved.

 

[mikejames]

You are right to be a bit concerned, the hot air is over 100C (afair 130C) when it leaves the heater. I have lagged the outlet from a Webasto with 3mm thick neoprene lagging bought in B&Q for central heating, leaving the first metre of hot air pipe unlagged. Apart from a wetsuit smell at first this has survived for some years.

 

[Robin2]

B&Q sell 100mm aluminium ducting.

 

[ShipsWoofy]

no it isn't, I think you are getting confused with the exhaust gases, if it was do you not think the plastic casing would go very brittle?

I have the exhaust figures somewhere I will post them later.

Sorry to butt in!

 

[cliff]

I measured the temperature of the HOT AIR exiting from my Eber at the heater ~110°C with no ducting attached so the air flow (I suspect) was greater than normal. I then measured the temperature at the outlet in the main cabin ~110°C (ducting attached so slightly reduced air flow) - the ducting is made from emission control ducting and is very well lagged).

Do you feel this is too hot? What temperature does your Eber run at? (Hot air not exhaust), is there something wrong with my Eber? (apart from the fact it starts every time /forums/images/graemlins/grin.gif)

I never got round to fitting a thermo-couple in the heater outlet with the ducting in place but I would expect the temp to be no more than 115°C.

 

[johnphilip]

when I fitted a new webasto I got ducting and Thermoduct lagging from Quay West marine http://www.quaywestmarine.co.uk
Lightweight, expensive and easy to fit. The effective output is far greater than on our previous boat which had a fairly long run of unlagged duct.
With the aluminium duct and lagging no fears of overheating anything else

 

[fluffc]

[ QUOTE ]
no it isn't, I think you are getting confused with the exhaust gases, if it was do you not think the plastic casing would go very brittle?

[/ QUOTE ]

Which it does, if you just 'turn off the power' rather than letting it cool down properly!

 

[ShipsWoofy]

Whoops, it seems I was wrong, I stand corrected and apologise for butting in.

I had thought the exhaust was the culprit for getting v. very hot, which it does, but to the tune of 280°C !

<span style="color:blue">3. How hot does the exhaust get in general use?

3) The maximum temperature of the exhaust pipe is 280°C measured 100 mm (4”) from the heater. Therefore it is important that the exhaust system is insulated with approved Eberspacher insulation material. </span>

 

[Pye_End]

Yep - the Webasto Thinsulate insulation is fine for the hot air ducting but not the exhaust ducting. Done that and got the T shirt. Gets very hot, and I lagged this with wrap-around insulation from a.s.a.p. in the end, after pulling off the 'candy floss' first!