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Hot air heater ducting

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caramorsimon View Drop Down
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Post Options Post Options   Quote caramorsimon Quote  Post ReplyReply Direct Link To This Post Topic: Hot air heater ducting
    Posted: 22 Apr 2016 at 9:51pm
alistair - I have the usual exhaust hose/wrap/outer metal wrap - have you added further lagging & if so what materials did you use?
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Alastair D Pugh View Drop Down
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Post Options Post Options   Quote Alastair D Pugh Quote  Post ReplyReply Direct Link To This Post Posted: 23 Apr 2016 at 2:10pm
My lagging is nothing fancy.  Just an asbestos-like woven tube (eBay - Eberspacher Exhaust Lagging) over the stainless flexible pipe all covered with an offcut of 60mm aluminium ducting left over from fitting.
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moongirl View Drop Down
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Post Options Post Options   Quote moongirl Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2017 at 10:25pm
Some food for thought! My boat has the remains of a heater fixed to the 'wall' between the cockpit and large locker - easy to get to I guess but I would have to take of stowage ie no melting type objects in touch - lazerette could get quite full causing problems with trim! The boat came with a new and as yet unfitted Airtronic D4 which will come in handy on those colder nights (Christmas Rally?) it seems that the ducts run down the starboard side so I will stick with that arrangement I think. The ducting is not very good and needs replacing - as part of my job I design MHRV ventilation systems for Houses using some robust 75mm semi flexible ducting that doesn't crush and has a reasonable bending radius - prefabricated bends are available as well although I note that the Instructions say 'keep' bends to a minimum.
I will have a good look at the boat next month and give some more thought to it.
On Muscadet de Havelet (the boat I race on) the heater is tucked right up under the deck over the port locker - another option maybe. I haven't checked to see if there is a site tube on my tank if not then I will have to wait until the boat is back in the UK maybe this Winter coming if I have had enough of cruising Norwegian and Swedish waters! 


COLIN
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moongirl View Drop Down
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Post Options Post Options   Quote moongirl Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2017 at 10:29pm
Following my previous post I think the Installation Instruction say no gravity feed. This implies that the heater must be higher than the top of a fuel pipe tee into the engine feed. Again measurements needed next month!
COLIN
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moongirl View Drop Down
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Post Options Post Options   Quote moongirl Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2017 at 10:30pm
It's late! I think I meant above the tank full level
COLIN
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moongirl View Drop Down
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Post Options Post Options   Quote moongirl Quote  Post ReplyReply Direct Link To This Post Posted: 13 Feb 2017 at 10:33pm
It must be bed time - after a very busy day! The existing heater is in fact in the lazerette!
COLIN
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