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The Norfolk Broads Forum / Broads Boat Owners Q & A / Diesel heaters
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Posted By Discussion Topic: Diesel heaters

Similar Threads That Might Help :
Diesel Heaters - But Which Type ????| Advice on fitting a diesel heater| Advice on fitting a diesel heater| Advice on fitting a diesel heater| Wanted - Webasto/Eberspacher diesel heater|

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L'sBelles
Oct-06-2020 @ 3:32 PM                           Permalink
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When I thought I needed a diesel heater for our boat I spoke with a chap who reconditions Webasto and Eberspachers who appeared very knowledgable about the subject. He advised that heaters designed for use in road vehicles are not suitable for marine use and despite losing a sale he would not sell me one of the units he had in stock as in his opinion it was not suitable. The silencer is just one of the issues but there are others like units that are intended for road use have altitude compensation apparently. Cannot see much use for that if you are always at sea level! There may be other differences but cannot remember all of what he said off the top of my head. The OP may be able to cobble something together out of the bits he has but whether or not it is reliable or efficient I would not like to guess.

ADI
Oct-06-2020 @ 10:22 PM                           Permalink
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Is this the kind of silencer you have Ray? marine silencer thinking a straight pipe through might be best, less joints to seal.

Regards

Adrian  Michelle

Beck  Braydon and Mere.

ADI
Oct-06-2020 @ 10:30 PM                           Permalink
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John I will have a close look at the silencer for a drain hole, its a 8kw heater.

Regards

Adrian  Michelle

Beck  Braydon and Mere.

ADI
Oct-06-2020 @ 10:36 PM                           Permalink
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L'sBelles I know there really efficient but not sure about reliability but am hopeful.

Regards

Adrian  Michelle

Beck  Braydon and Mere.

Regulo
Oct-06-2020 @ 11:20 PM                           Permalink
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Yes, Adi, that's the one. I don't remember paying that much, but it did seem expensive at the time! To be honest, I'd fit it without a silencer, and see how it goes. It's not a great deal of trouble to fit one at a later date, if you deem it necessary. As I said, I really couldn't say it made much difference inside the boat. Probably quietens it down to the outside audience, but as I'm never out there when it's running - who cares?  Smile

Regards, Ray.

annville
Oct-07-2020 @ 10:54 AM                           Permalink
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Hi Often the difference with marine and road/caravan is the material that they are constructed from caravan cookers are a classic example caravan one's  steel that rusts or boat one's brass/stainless that doesn't, the silencers that are shown are round and i guess are road use,  boat one's that i have seen and the one on my last Eberspacher was/are square with a drain hole and made from heavy metal coated, and the through hull fitting, has a air/heat gap between the hull plate and the exhaust pipe to stop heat transfer to the hull,   the pipe is flexible stainless steel held on by a clamp to the heater, silencer and hull fitting, road vehicles wouldn't need this, as an aside they were invented during the last war by the Germans to heat there tanks whilst stationary to stop them freezing up in Russia, so been around a long time, then used on coaches and lorrys. John

ADI
Oct-07-2020 @ 8:24 PM                           Permalink
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I have to say I am a bit concerned about the exhaust set up and can see the idea of a drain pipe, I guess it needs to be well above the waterline too, would the drain off pipe go to the bilge?

Regards

Adrian  Michelle

Beck  Braydon and Mere.

BuffaloBill
Oct-08-2020 @ 8:42 AM                           Permalink
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When doing anything of this kind on your boat, ask
yourself how much is yours and your families lives
worth. It just isn't worth trying to do it on the cheap.
Just my opinion of course........

The older I get...
The better I was....!!

Steve51
Oct-08-2020 @ 8:52 AM                           Permalink
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ADI, I think there's a bit of misunderstanding going on here. Just connect the exhaust straight to the skin fitting and forget the silencer. As Ray says, they make little difference and any condensation forming in the exhaust on cool-down will be expelled in the form of steam when it starts up again.

As an aside, I'm pretty sure that the plastic fuel line supplied with the heater doesn't comply with the BSS.

Edited to add. Wise words from BB.
Steve. CM1 and NR12

This message was edited by Steve51 on Oct-8-20 @ 9:31 AM

L'sBelles
Oct-08-2020 @ 9:19 AM                           Permalink
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We have an Eberspacher fitted on our boat and the exhaust goes straight through the hull; no silencer. To be fair it is whisper quiet inside and outside but then it is only rated at 3.5 kW to warm the air in the boat we do not expect to cook our breakfast with it!

annville
Oct-08-2020 @ 12:05 PM                           Permalink
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Hi Adi The drain hole doesn't have a drain hose connection the small amount of water just drips where it falls then evaporates,  as to if you fit a silencer or not, if you dont i would allow provision to fit one at a later date in case you need to,  i would look up the fitting instruction for Webasto and Eberspacher and be guided by them as to a marine fit the instructions for your one that came with it were possible for a road/caravan fit and not suitable for marine use and pass the BSC, as to noise it may not be noisy during the day but on a remote mooring at night it could well be intrusive. John

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