Diesel heater exhaust tubing

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PetiteFleur

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Chinese heater nearly installed, tried fitting the exhaust run today, 24mm marine exhaust outlet & a 24mm silencer - tried fitting the supplied flexible hose, the plain end fits ok on the heater but when cut the internal diameter is too small... Should I buy a length of genuine Eberspacher/Webasto exhaust flexible which appears to be 24mm internal diameter. Will it seal ok on the spigots or should I use exhaust paste as well?
Also the exhaust will be about 12/13" above the waterline on the transom so should I put a swan neck in the tubing?
 
I put my chinese heater in over the last few weeks. Going back to put some more insulation on the exhaust tomorrow. I bought some "proper" stainless exhaust for the 3M run and used exhaust paste on all the joins. I did use the supplied piece to do the final 500mm reach to the through hull fitting.
Don't under estimate how much the exhaust needs insulating if you think it's going to come into contact with any plastic. I had a double skin of the fibre glass sock, followed by a wrap of the thicker bandage. I also put a metre of some rubber covered fibre glass on where it went through the bulkhead - even the bit with that on is very warm to the touch....if not hot enough to threaten melting fenders! The other parts are too hot to hold for very long, so I'm going to shield them from the fenders that will sit on top.
Definitely put a swan neck in the exhaust! As high as possible! Here's some pics https://www.facebook.com/media/set/?set=a.10213320175060878&type=1&l=3cdb2d4916
 
I needed to extend the exhaust so bought a 2m length of genuine Eber exhaust, rather than buying a shorter length and having a joint. There is a noticeable difference in quality- the Chinese stuff is pretty lightweight.
IMHO the exhaust is the bit where you don't want to scrimp, and in the scheme of things it's not going to add a lot to the cost of the installation. It's also worth swapping out the supplied jubilee clips for something better.

Definitely insulate it as well- it gets hot enough that the stainless discolours slightly, so it's several hundred degrees. Easiest way is to buy a tube of glassfibre lagging and slip that over.
 
I have fitted my chinese heater over the past 2 weeks and like Kelpie I bought a 2m length of genuine Eber exhaust. I threw the supplied exhaust tubing in the skip, I wouldn't fit it onto a vehicle let alone a boat. I had a pair of genuine Eber exhaust clamps and used those (as the supplied jubilee clips are not upto the job in my opinion) and exhaust paste to seal it. The insulation is also genuine Eber and now knowing how hot it gets I am considering buying another length of exhaust sock to fit over the top of the existing.
 
Marc

Did you fit the heater inside the boat (cabin locker) or is it in a cockpit locker?
I’ve bought a Chinese diesel heater but finding it nigh on impossible to route the warm air ducting from the cockpit lockers through to the cabin.

Rob
 
Where did you guys mount your heaters out of interest? I'm going to be doing mine soon
Also is your heater air intake from inside or outside?
Thanks
 
Thanks for replies, I'll order some genuine exhaust and fit the same. I had bought some exhaust tubing insulation but will probably double up on it. I agree the supplied clips are rubbish and have fitted JCS Hi-Grip stainless which are excellent. As robertj says, routing the ducting is not easy - my heater is in the stern and will have 4 outlets, so far I've only done the stern cabin and led the ducting through the cockpit lockers and will extend it the next time I go down to the boat. Drilling holes for the ducting is not easy and still not decided on the best route to get to the saloon!
I'll update after my next visit.
 
robertj said:
Marc

Did you fit the heater inside the boat (cabin locker) or is it in a cockpit locker?
I’ve bought a Chinese diesel heater but finding it nigh on impossible to route the warm air ducting from the cockpit lockers through to the cabin.

Rob
Click to expand...

Hi Rob,
it's in the cabin under the port side "trot box". Exhaust goes out of the stern transom. Heating air and combustion air both taken from in the cabin, for the moment. Going to see how that goes.
It only just fits!
 
MarcJ said:
Hi Rob,
it's in the cabin under the port side "trot box". Exhaust goes out of the stern transom. Heating air and combustion air both taken from in the cabin, for the moment. Going to see how that goes.
It only just fits!
Click to expand...

Thanks Marc
 
a related question - mine is a little smokey when it's fired up - but I am told this is "normal" when first started?
 
where or from where is the best way to order a eber exhust? and a marine exhsust oulet?

Also my exhsust will rise by a 1 meter is that ok? but overall length abot 2 meters

Thanks in advance

tom
 
From memory I got my exhaust tubing & marine exhaust outlet (angled) from souther lasers - off ebay. Not sure about your 1m rise though, there are Eberspacher installation instructions on the web, sorry don't know the link.
 
For installation parts you can try Butlertechnic, PFJones, H Bowers or Owen Cox at Autoterm UK (who will also tell you why buying Chinaspachers is a bad idea.)
I have bought stuff from H Bowers who also have an Ebay store. For small quantities the Ebay store is cheaper as although the item cost is higher, postage is included.
 
peteK said:
These heaters should not be fitted in a living area and should be fitted in a cockpit locker or engine bay.
Click to expand...

Ideally, but it's not always practical. On any boat I've owned there hasn't been much to separate the lockers or engine space from the living accommodation anyway- generally just a plywood bulkhead, with no hope of containing fumes or spills.
 
peteK said:
These heaters should not be fitted in a living area and should be fitted in a cockpit locker or engine bay.
Click to expand...
I have be considering my options re location for a heater like this. It will have to go either in the cockpit locker or in a space aft of the aft cabin, between it and the actual transom which also contains the fuel tank. The former has advantages with regard to access, but reduces the space for the usual gear, plus the possibility of melting things etc. Are there any recommendations against installing it in the latter?
 
Spirit (of Glenans) said:
I have be considering my options re location for a heater like this. It will have to go either in the cockpit locker or in a space aft of the aft cabin, between it and the actual transom which also contains the fuel tank. The former has advantages with regard to access, but reduces the space for the usual gear, plus the possibility of melting things etc. Are there any recommendations against installing it in the latter?
Click to expand...

No, it would be OK there. My Webasto is mounted in the void under the back of the cockpit, where the steering gear and fuel/water filler hoses live.
 
MarcJ said:
Heating air and combustion air both taken from in the cabin, for the moment. Going to see how that goes.
Click to expand...

A gem gleaned from here, only obvious when someone has pointed it out. If you draw the heating air from inside the cabin, the outlet air will be hotter than if you draw it from outside. BUT that arrangement will not help with condensation as the moisture stays in the air and will condense out once the air cools.
 
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