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Post by Clinton Cool on Sept 23, 2016 7:30:51 GMT
My boat suffers from tar stains from the solid fuel stove. Another boater told me that if I leave the chimney hat off this will cease. I was going to say coolie hat but as 'coolie' is a derogatory term for a south east Asian I'll stick with chimney hat. Wouldn't want to upset anyone or cause any outrage, you know?
Anyway what's the consensus on here, best on, or off?
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Post by Albion on Sept 23, 2016 10:50:22 GMT
Neither, get yourself a double skinned (lined) chimney. Sorts the problem completely. Roger
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Post by Clinton Cool on Sept 23, 2016 11:17:36 GMT
Neither, get yourself a double skinned (lined) chimney. Sorts the problem completely. Roger More money needs to be spent then! Just so I understand, how do these solve the problem?
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Post by Albion on Sept 23, 2016 12:50:48 GMT
Neither, get yourself a double skinned (lined) chimney. Sorts the problem completely. Roger More money needs to be spent then! Just so I understand, how do these solve the problem? The inner skin fits down inside the flue pipe while the outer fits over the collar stub. Any flue tar/black moist combustion residue runs back down the flue pipe and is re-burnt rather than, in the case of a single skinned chimney, condensing and then running down to ooze between the chimney and the collar stub and then down your roof. The only thing to watch is if the internal flue pipe and the collar are at a different angle to each other due to the roof camber in which case, in the case of a fixed internal liner, it might not fit down onto the collar properly. I solved that one by making a liner out of stainless, very large diameter, flexible exhaust pipe because then you can shape the internal skin to the required angle. I was in the motor trade at the time so it might not be an easy option for you. I might even have some of that left at home but shan't be back home until Oct 4th from France. Roger
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Post by Deleted on Sept 23, 2016 13:32:33 GMT
More money needs to be spent then! Just so I understand, how do these solve the problem? The inner skin fits down inside the flue pipe while the outer fits over the collar stub. Any flue tar/black moist combustion residue runs back down the flue pipe and is re-burnt rather than, in the case of a single skinned chimney, condensing and then running down to ooze between the chimney and the collar stub and then down your roof. The only thing to watch is if the internal flue pipe and the collar are at a different angle to each other due to the roof camber in which case, in the case of a fixed internal liner, it might not fit down onto the collar properly. I solved that one by making a liner out of stainless, very large diameter, flexible exhaust pipe because then you can shape the internal skin to the required angle. I was in the motor trade at the time so it might not be an easy option for you. I might even have some of that left at home but shan't be back home until Oct 4th from France. Roger This was the problem we had. Although our chimney was double skinned we still had tar that escaped onto the collar outside and then onto the roof. I guess not as much as we would have had if the chimney had had a single skin but we still got it. The original chimney that was on the boat when we bought it must have been a better fit of the internal section to the collar because we rarely if ever saw any tar on the collar outside.
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Post by phil70 on Sept 23, 2016 15:31:41 GMT
Even using a double skinned chimney I got tar dripping as it condensed on the underside of the chimney hat. Removing the "hat" solved the problem. Phil
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Post by Albion on Sept 23, 2016 15:56:03 GMT
Even using a double skinned chimney I got tar dripping as it condensed on the underside of the chimney hat. Removing the "hat" solved the problem. Phil The reason that I never had that type of problem was that I never used a coolie hat on my chimney so I have to bow to the experience of those that did but I still say (and recommend) that a double skinned chimney solves the stuff oozing out round the collar. Roger
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Post by Telemachus on Sept 24, 2016 6:49:51 GMT
Yes we put the hat on only in rain. Double skinned flue or not, if the warm moist flue gasses hit the cold hat, condensation and dripping is bound to occur.
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Post by Albion on Sept 24, 2016 7:31:02 GMT
Yes we put the hat on only in rain. Double skinned flue or not, if the warm moist flue gasses hit the cold hat, condensation and dripping is bound to occur. Agreed, but in 7 years of living on my boat for 5 days per week I never used a coolie hat even in the rain. If the fire is on the rain does nothing. If the fire is not on then I capped the collar with a blanking cap that you can buy. Roger
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Post by phil70 on Sept 24, 2016 10:42:22 GMT
Off topic but this thread reminded me of an old gag.........Pith Helmet, put it on, take it off......Pith on, Pith off.
Soz, Phil
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Post by Clinton Cool on Sept 24, 2016 11:20:56 GMT
Cheers for the replies. I guess I need a double skinned chimney then. Are they one standard size, any recommendations?
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Post by Albion on Sept 24, 2016 15:32:18 GMT
Cheers for the replies. I guess I need a double skinned chimney then. Are they one standard size, any recommendations? I found that the variability of fit (because you have two dimensions to consider, inner and outer) means that you have to be more careful choosing. Not all collars are quite the same diameter and taper. Flue pipes can vary, and as I said before the angle of the flue pipe to the collar can affect the fit. Take measurements from the boat and choose carefully or, better still, get the boat to a chandlery and see if you will be allowed to trial fit one. I expect that one of the bespoke chimney makers could do one for you but you are talking top money for a top product. Roger
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Post by Saltysplash on Sept 25, 2016 6:11:14 GMT
No Hat for us, and no tar stains.
The chimney is capped off during the summer but left to the elements at all other times. Any rain that tries to make it down the chimney when the fire is lit is evaporated long before it reaches the fire
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Post by Albion on Sept 25, 2016 7:40:18 GMT
No Hat for us, and no tar stains. The chimney is capped off during the summer but left to the elements at all other times. Any rain that tries to make it down the chimney when the fire is lit is evaporated long before it reaches the fire Exactly. Those coolie caps are always poorly made tinny things that don't fit securely and I never found the need for one. Come to think of it I can't remember seeing photos of the old working boats with them either. 🤔 Roger
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Post by Saltysplash on Oct 18, 2016 17:50:00 GMT
Our Next door neighbours boat with Chimney Hat Ours without Hat
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