[Stoves] Metal Chimney Construction/Re: Lanny Henson pot insulator

[Lanny Henson]

Crispin,
I am trying to use skill sets that I think I can teach to an average person.

Just drill a few 1/8" or 3 mm holes, in the bottom cap, that should not 
effect the draft.
Another way is to run the lap for a connection backward so the crimped in 
catches the water and leaks it out a joint/connection. This makes nasty 
looking streaks if used up the stack.
One good thing about the drip tee when used outside the wall is that you may 
not need a stack head (vent cap). If a little rain gets in no big deal. It 
just runs through.
Also the perforated cap can be removed from the bottom of a drip tee by 
unbending 3 tabs, then you can drop a stone down the top of the stack, to 
knock out the soot.
If wind effects your draft then you may need a draft inducing stack head. A 
Wind Bonnet has a vain and turns with the wind. They are easy to build, I 
will do one for my next chimney video.
Lanny


----- Original Message ----- 
From: "Crispin Pemberton-Pigott" <crispinpigott at gmail.com>
To: "'Lanny Henson'" <lannych at bellsouth.net>
Sent: Thursday, March 06, 2008 10:59 AM
Subject: RE: [Stoves] Lanny Henson pot insulator


> Dear Stove Pipers
>
> Lanny is so professional with his metal working skills it looks easy!
> Actually, it is pretty easy, he is just good at it.
>
> The video shows, more than the drip tee, how good  Lanny is cutting tee's 
> to
> fit together the first time!
>
> Lanny, I have a concern about the amount of air getting into the chimney,
> not because it is from the warm room but because of the loss of draft.  We
> have serious issues trying to get the stoves sealed enough to burn 
> properly
> and cleanly.
>
> I managed to get the excess air in a coal stove down to 55% - so low that 
> it
> start to burn 'dirty' again.  But even relatively small leaks make a big
> difference.
>
> So...sheet metal skills being widely available, what can I do for a water
> trap that will not let in any air at all, or very, very little?
>
> We can use welded parts too...
>
> Regards
> Crispin
>
> +++++
>
>
> Drip tees were invented a long time ago to deal with condensation in metal
> chimneys.
>>You would think that if you introduced outside air into the exhaust stream
>>that you would just cause more condensation, but it works, somehow.
>>http://www.youtube.com/watch?v=YbN5xhV8Auo
>