Diesel Heaters

[MtB]

Just now, BODs SR2 said:

Question: what’s the issue with using the supplied silencers. 

 

They leak like a sieve.

 

 

[Tony Brooks]

2 minutes ago, MtB said:

 

They leak like a sieve.

 

 

 

So in a confined space like a boat's hull exhaust fumes can/will build up and eventually kill you. Mainly by CO but could also drown you in CO2. It might also be hard to install the heater high enough in the hull to let condensation drain fro the exhaust outlet in the hull so a special exhaust is needed. You don't want condensation running back into the combustion chamber.

[BODs SR2]

10 minutes ago, MtB said:

 

They leak like a sieve.

 

 

Which part tends to be the problem ie joints or flexi pipe?

[MtB]

3 minutes ago, BODs SR2 said:

Which part tends to be the problem ie joints or flexi pipe?

 

Both.

[BODs SR2]

7 minutes ago, Tony Brooks said:

 

So in a confined space like a boat's hull exhaust fumes can/will build up and eventually kill you. Mainly by CO but could also drown you in CO2. It might also be hard to install the heater high enough in the hull to let condensation drain fro the exhaust outlet in the hull so a special exhaust is needed. You don't want condensation running back into the combustion chamber.

Thanks. What are the special features of a marine exhaust. Sorry just trying to grasp it all. 

[MtB]

5 minutes ago, BODs SR2 said:

Thanks. What are the special features of a marine exhaust. Sorry just trying to grasp it all. 

 

They don't leak or fall to bits! Supposedly. I don't know for sure as I'm still trying to buy one.

 

The silencers that come with the cheap heaters are two thin pressed steel shapes spot-welded together at about about 1" pitch, so exhaust gas leaks out foem between them. And there is a condensate drain hole from which exhaust gas issues.

 

Also, the pipe connection spigots fall out easily on mine. Just a total disaster in every way. 

 

The plain-ended stainless steel pipe sections don't clamp up tight on the spigots either, no matter how much you tighten the clamps, so they fall off easily and-or leak. 

 

 

Edited December 26, 2022 by MtB

[Peanut]

The silences supplied with the Planar heater kit is fine, it is the Chinese kit that leaks combustion gas into the boat.

The Planar heater originated in Russia and I believe is now made in Czechoslovakia.

[TheBiscuits]

2 hours ago, MtB said:

They don't leak or fall to bits! Supposedly. I don't know for sure as I'm still trying to buy one.

 

Hull fitting (first Google hit, not necessarily a recommendation)

 

https://www.amazon.co.uk/bulrusely-Exhaust-Eberspacher-Installation-Resistant/dp/B099WQQJVG

 

 

[MtB]

5 minutes ago, TheBiscuits said:

 

Hull fitting (first Google hit, not necessarily a recommendation)

 

https://www.amazon.co.uk/bulrusely-Exhaust-Eberspacher-Installation-Resistant/dp/B099WQQJVG

 

 

The "marine exhaust" under discussion is MUCH harder to buy though. Difficult as there is no "Add to cart" button.

 

This one:

 

https://www.melloronline.co.uk/Heater_Installation_Accessories_/10122/Marine_Exhaust_Silencer_with_lagging_24mm_2m_lg.html

 

 

There is however this one on Amazon, for an extra £100!

 

https://www.amazon.co.uk/Webasto-Eberspacher-Silencer-9014067A-1322001A/dp/B016PZRY3E/ref=sr_1_4?keywords=marine+exhaust+24mm&qid=1672069227&sr=8-4

[TheBiscuits]

16 minutes ago, MtB said:

Difficult as there is no "Add to cart" button.

 

Give it a week or so and there will be...

 

[MtB]

3 minutes ago, TheBiscuits said:

 

Give it a week or so and there will be...

 

 

 

The button was missing before they closed for holiday. But I never got around to calling them about it before they closed! 

[David Mack]

5 hours ago, MtB said:

 

They don't leak or fall to bits! Supposedly. I don't know for sure as I'm still trying to buy one.

 

The silencers that come with the cheap heaters are two thin pressed steel shapes spot-welded together at about about 1" pitch, so exhaust gas leaks out foem between them. And there is a condensate drain hole from which exhaust gas issues.

 

Also, the pipe connection spigots fall out easily on mine. Just a total disaster in every way. 

 

The plain-ended stainless steel pipe sections don't clamp up tight on the spigots either, no matter how much you tighten the clamps, so they fall off easily and-or leak. 

 

 

None of which is a problem if you are going to install the exhaust and silencer on the underside of your caravan or RV, but a different kettle of fish if you are going to install them within a boat, where leaking exhaust fumes and carbon monoxide will be contained within the boat hull.

[Mad Harold]

2 hours ago, David Mack said:

None of which is a problem if you are going to install the exhaust and silencer on the underside of your caravan or RV, but a different kettle of fish if you are going to install them within a boat, where leaking exhaust fumes and carbon monoxide will be contained within the boat hull.

I fitted the exhaust on mine direct to the hull outlet and dispensed with the silencer (which made very little difference to the noise level).

It whistles a bit on the start up cycle, but on a lowish setting it is almost inaudible from outside the boat.

[MtB]

7 minutes ago, Mad Harold said:

I fitted the exhaust on mine direct to the hull outlet and dispensed with the silencer (which made very little difference to the noise level).

 

On mine (installed in my workshop) adding the cheapo silencer gives a substantial reduction in noise level.

 

 

 

[PaulJ]

2 hours ago, David Mack said:

None of which is a problem if you are going to install the exhaust and silencer on the underside of your caravan or RV, but a different kettle of fish if you are going to install them within a boat, where leaking exhaust fumes and carbon monoxide will be contained within the boat hull.

Ive noticed a few boats recently where the bulk of the the exhaust and silencer are mounted on the outside of the boat. 

OK, admittedly its not the most beautiful install but if you are on a tight budget its a sensible way to to get round any potential exhaust leaks.

[Telstar]

13 hours ago, MtB said:

On mine (installed in my workshop) adding the cheapo silencer gives a substantial reduction in noise level.

I agree, every installation I have seen, even the cheapo silencer makes a huge difference to the noise reduction (and annoyance for others)

 

These look ok

https://www.ebay.co.uk/itm/195500663220?hash=item2d84bf61b4:g:AWcAAOSwuDBfnbuW&amdata=enc%3AAQAHAAAA4P77ItC9QZx6wljft8vPBsZL%2B2jxuQ7Y%2F0wOhcoyQafyL97LIiDx3XKKy6iMfgQ8Gh9eqzNM7FDDZQhd1HYvhaZD%2FEL%2FcjyK3HFpPj0jbwqF9do02tNA%2FurSfT9%2F1OgogWvlepdpKMlOdxjM8D9R6CIR8%2FSwHXNQx0%2FUrYjdoiHYmvR5b4zbRPsvwEqtEqQrrhmnguQTY%2Fstev%2BiXFm9B5DPBSXcdhoAe8aRfj%2FDFeMEryGvIHYc0bkuDh23hxv%2BvjBlVGdn9fVeFgZ1VX68V39WlSohpNcTbt%2BjQ%2BYpO0Z2|tkp%3ABk9SR_yhua-qYQ

[Sea Dog]

I stumbled a cheapo plastic air intake silencer for my Eberspacher, possibly on eBay, for about 4 quid iirc. I didn't realise there was such a thing til then, but it made a bit of a difference.

[MtB]

5 minutes ago, Telstar said:

I agree, every installation I have seen, even the cheapo silencer makes a huge difference to the noise reduction (and annoyance for others)

 

These look ok

https://www.ebay.co.uk/itm/195500663220?hash=item2d84bf61b4:g:AWcAAOSwuDBfnbuW&amdata=enc%3AAQAHAAAA4P77ItC9QZx6wljft8vPBsZL%2B2jxuQ7Y%2F0wOhcoyQafyL97LIiDx3XKKy6iMfgQ8Gh9eqzNM7FDDZQhd1HYvhaZD%2FEL%2FcjyK3HFpPj0jbwqF9do02tNA%2FurSfT9%2F1OgogWvlepdpKMlOdxjM8D9R6CIR8%2FSwHXNQx0%2FUrYjdoiHYmvR5b4zbRPsvwEqtEqQrrhmnguQTY%2Fstev%2BiXFm9B5DPBSXcdhoAe8aRfj%2FDFeMEryGvIHYc0bkuDh23hxv%2BvjBlVGdn9fVeFgZ1VX68V39WlSohpNcTbt%2BjQ%2BYpO0Z2|tkp%3ABk9SR_yhua-qYQ

 

 

Brilliant, thanks.

 

Looks just the job so I've ordered one given Mellor don't seem to want anyone ordering stuff from them. 

 

I'll let the board know what it's like when it arrives.

 

 

[Sea Dog]

3 minutes ago, MtB said:

I'll let the board know what it's like when it arrives.

It does look like a proper job. If it's a good 'un once fitted this should probably be a sticky somewhere or other as the answer to one of the most perennial of issues.

[MtB]

3 minutes ago, Sea Dog said:

It does look like a proper job. If it's a good 'un once fitted this should probably be a sticky somewhere or other as the answer to one of the most perennial of issues.

 

I'd have preferred the Mellor one as it comes with two x 24mm flexible exhaust tubes already welded on, saving two mechanical joints in the exhaust, internally.

[BODs SR2]

19 minutes ago, MtB said:

 

I'd have preferred the Mellor one as it comes with two x 24mm flexible exhaust tubes already welded on, saving two mechanical joints in the exhaust, internally.

Are flexible exhausts a potential source of leaking?

[Telstar]

40 minutes ago, BODs SR2 said:

Are flexible exhausts a potential source of leaking?

No, they are very strong.

[MtB]

27 minutes ago, Telstar said:

No, they are very strong.

 

The pipes themselves are fine. It's the joints the installer makes at each end that tend to fall off. 

[rusty69]

On 26/12/2022 at 20:23, Mad Harold said:

I fitted the exhaust on mine direct to the hull outlet and dispensed with the silencer (which made very little difference to the noise level).

It whistles a bit on the start up cycle, but on a lowish setting it is almost inaudible from outside the boat.

I did the same. Binned the original silencer. I do have endless sleepless nights worrying about the fluid build up in the exhaust though. I then tell myself it probably burns off, or drains out, and go back to sleep wondering if I really need to buy one of these:

 

[BODs SR2]

Looking at the fuel side does anyone have the spec for the supply pipe and what kind of filter is best. Thanks.