need for heat insulation behind a dickinson newport?

[foojin]

Originally Posted by AnchorageGuy

This was our Dickinson Diesel heater. The backer is fireproof board, covered with a SS sheet and in a teak frame, mounted with 1/2 inch stand offs at the corners and center edges. we used this extensively for years.

AG, what sort of fireproof board did you use? That might be what I want.

[foojin]

Originally Posted by cburger

1/2" marine ply cover with home depot white tile, framed in teak

Regular old marine ply, not treated with anything? Interesting.

[AnchorageGuy]

It's a concrete type fireboard that we picked up at a building supply house. They had some small pieces. Chuck

[Strait Shooter]

You don't need to use any stand off if you use tile or stone directly on the concrete backer board, that's according to the manual for diesel application.

I just used the 1/2" concrete backer board as I had some laying around. So I have backer board, stainless and standoffs on 3/4" marine ply on one side, and 1-1/2" bulkhead, backer board, granite on the rear. The stove does get pretty hot, but so far I don't see anything amiss. I worry more about the ceiling above the stove quite honestly.

[AnchorageGuy]

If you notice on my photo, there is a 12 volt fan mounted near the stovepipe. This helps distribute the heat and keeps the pipe and overhead from getting too hot. The fan has two speeds and for heating we only used the lower speed. Chuck

[Strait Shooter]

Yes, that's correct a fan keeps it under control, just don't like having it on all the time.

I think I'm going to put a piece of stainless on some 1/4" standoffs on the ceiling above just to check it out. I've always thought that the fasteners created hot spots. Does anyone have suggestions on how to deal with it? It's always seemed like a non problem to me from my own experiences.

[foojin]

Originally Posted by Strait Shooter

Yes, that's correct a fan keeps it under control, just don't like having it on all the time.

I think I'm going to put a piece of stainless on some 1/4" standoffs on the ceiling above just to check it out. I've always thought that the fasteners created hot spots. Does anyone have suggestions on how to deal with it? It's always seemed like a non problem to me from my own experiences.

This thread has me thinking I should look into leather or other non-metal washers to limit the heat transfer at likely hotspots.

On our last boat we found fans indispensable for distributing heat through the cabins and planning placement was an important consideration while picking a location for the heater.

[cburger]

Originally Posted by foojin

Regular old marine ply, not treated with anything? Interesting.

Cement board is pretty heavy, the tile is the insulator and does not get really that hot around the heater, had a runaway heater last year the unit and flu got cherry red and was making noise like a freight train, not a bit of scorching anywhere, like it never happened, scared the crap out of me though.

[Cephious1]

I installed a dickinson heater this year, I agree with the other people, I bought a couple of low voltage 12 volt fans. They work perfectly to move the heat around and keep things from getting too hot in places

[etesian]

I Feel that tile on some kind of concrete backer board mounted directly to the bulkhead behind the heater and chimney is plenty good. We are not talking about a forge furnace or anything here. I would feel comfortable with just tile/backer on my boat. A bathroom concrete board product called wonderboard is light, easy to work with and a good substrate for tile. I would use that or similar product. I have a Sig100 on my boat that's bolted directly to the bulkhead (the design of the heater has the stainless heat shield with standoff built in) and the factory supplied heatshield installed between the chimney and bulkhead up to the ceiling. After two years, one of which was liveaboarding in BC I have not noticed any hotspots in the bulkhead including where the fastners are. As others have said, there is a hot spot on the ceiling which is a good place for a fan to move the warm air around the boat. When I do an interior reno on my boat this spring the heat shield is going and concrete board with tile is going in behind the chimney and heater.
Just my 2 cents.
Kristian

[mitiempo]

The fasteners should be stainless, as it is a poor heat conductor. Aluminum fasteners will conduct heat very well and should not be used.