Eberspacher ducting insulation

I did mine with Thermawrap too... worked really well, and made a huge difference.

Also, in one area, where it was hidden, but prone to damage, I replaced the flexible pipe with a length of standard soil/drain pipe... its near enough the right diameter that it works, and is heat rated well enough to be completely safe... I also lagged it in Thermawrap, and never suffered crushed pipe with things being thrown into storage lockers ever again!
 
I've not bothered with insulation. The air ducting runs under the cabin sole so provides "underfloor heating" as well as warm air to the cabin (nice warm feet).
 
Unfortunately mine runs through the cockpit locker, which I have no particular desire to heat, before getting to the saloon, and is not particularly warm by the time it reaches the fore cabin.
 
31ft yacht, Webasto ST2000 and two outlets.

I found the difference was warm air without the insulation similar to a medium setting on a hair dryer, which you could hold your hand under. However, after fitting the insulation the hot air was now too hot to hold my hand under for more than a few seconds.

Worried about Nigel1's comment because I have insulated all the way up to the Webasto. Checked the manual but nothing in it. :confused:

BTW, I used the expensive stuff Ian linked to in the first post. Found it near on impossible to get heater hose through lengths of 75cm insulation and had to cut it down to feed in on.

Pete
 
Last edited:
Thanks for the answers; hadn't thought of a multifoil type insulation, I'll get down my local Homebase ASAP.

As an aside, as a local authority building inspector, multifoil insulations have been subject to a lot of controversy, and it's mentioned on the Thermawrap page about checking with the local building control office before using. Good to hear though it makes a difference & is worthwhile to do.
 
Pete7 said:
31ft yacht, Webasto ST2000 and two outlets.


Worried about Nigel1's comment because I have insulated all the way up to the Webasto. Checked the manual but nothing in it. :confused:


Pete
Click to expand...

Hi Pete, tried to find where that little gem of information came from, it was from on the various manuals I have, or looked up online. Dont think I would have imagined it:eek: as I left a meter of ducting from the webasto unit clear of insulation. I'll keep looking
Cheers
Nigel
 
Had a reply back from Webasto Technical Department:

Yes the advice you have been given is correct, it is good practice to leave the first metre / 1.5m uninsulated as the insulation can in some cases retain too much heat around the rear of the heater and cause an overheat fault.

This advice won’t be in the installation or workshop manual as thermo duct is a UK product, and the manuals are created by Germany.

With best regards,
Technical Support Team

so looks like a need to modify my installation as advised by Nigel.

Pete
 
Pete7 said:
Worried about Nigel1's comment because I have insulated all the way up to the Webasto. Checked the manual but nothing in it. :confused:

Pete
Click to expand...

me too, has been insulated for a few years now and can run for up to 15 hours at a time some winters without overheating problems. It doesn't appear to be causing my installation a problem.
 
Pinnacle said:
Which of their products did you use?
Click to expand...

Sorry about the delay - been away.
I used the General Purpose Wrap and fixed it in place with their tape. I'm sure other fixing methods would be just as good but I assumed their tape would stick reliably and not be affected by the heat.
All worked as hoped so far.
 
I did mine with the foil bubble wrap,very effective, saloon outlet temp boosted 10°, can't remember what make, sourced E bay.

I've got enough left to do another boat, free for the price of postage.
 
DogWatch said:
me too, has been insulated for a few years now and can run for up to 15 hours at a time some winters without overheating problems. It doesn't appear to be causing my installation a problem.
Click to expand...

Truth is that in practise it can depend on a few factors and not just one alone. If the system and duct are of the correct size, length etc and exit the heater in a straight line, number and size of vents are not exessive then I have not found the need to leave the first bit uninsulated, obviously its worth doing it and removing a bit if you do experience trips. It is more sensitive to fauly cut out thermistors and also more likely to happen with a later heater because of the reduced overheat temperature rating introduced to retain CE marking. As the tech dept advised, this is not a Webasto Germany product but one from a southern UK distrubuter. One area worth leaving uninsulated for practical purposes though is where it runs through a locker containing clothing and the like (internal) the warmth given off is a bit like having a wardrobe radiator athome to avoid mustiness.
 
I used some of that foil covered bubble wrap, but could still feel the warmth on the outside of the insulation afterwards.

I then found some spare bubble wrap lying around at home and added a couple of layers of that. Very effective! And much cheaper - FOC in fact.

I knew all that spare bubble wrap would find a use one day:)
 
You must log in or register to reply here.

Share this page

Top