Duane Hylton

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since Feb 14, 2017
North Alabama
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Recent posts by Duane Hylton

This sounds like a great project. Please keep us informed on your progress.
4 months ago
Hi Denise, and R Spencer,

From the building code:

A standard fire box must have a depth of 20 inches minimum.

A Rumford exception allows 12 inches, but at least 1/3 of the width.

You can read the NJ version here:New Jersey Code
5 months ago
You mention that your fireplace gets narrower towards the back.

So I have two questions:

1) Is the fireplace also rather shallow (meaning from the opening to the back wall of the fireplace) when compared to a 'normal' fireplace?
2) If you look up inside at the ceiling of the firebox of the fireplace, is it tapered up and towards the back of the fireplace?

If yes to both of those then you have a Rumford fireplace and it would be well worth the cost of fixing the chimney. The Rumford is the only fireplace that I'm aware of that will yield a net positive heat for the room and house it is used in after taking into account air supply drafts and the like.

I have one that I built from a kit and it is amazing how much heat it produces. Usually a teepee type fire is built by leaning the logs / splits vertically against the back wall of the fireplace.
5 months ago
Two questions come to mind:
1) what are the temps of the outside of the barrel, the pipe going into the wall, the pipe coming out of the wall?
2) you mention a concrete tunnel under the bath; what is it made of and how is it insulated from the surrounding soil?

And one comment: Those pipes don't appear to be insulated. That would have to be first on my list of modifications.
5 months ago
That makes a lot of sense Travis. After your clarification I re-read your original post and now see why you are so happy. That's great that you have the space at neutral thermal inertia. Not to be snarky or anything but I'm glad that it is you and not me in Maine in winter. Here in N. Alabama we can see temps close to zero F but that is rare and never lasts long. But I've been to Maine in the summer and it is very beautiful. Keep us posted on your progress.
6 months ago
Glad you got it figured out Travis. I'm not clear on how a constant 38F inside is enough to be comfortable but it sure beats the snot out of -10.
6 months ago
I know that many of you will be aghast at this but here goes. I take four or five charcoal briquets (sometimes six if the wood is still green) and saturate them with charcoal lighter fluid. Then I stack them in the bottom of the burn chamber and set the wood on top of them. It provides instant ignition with a match, and instant rocket sound. Never fails, never smokes. They burn with a decent flame for about five minutes and by then the wood is burning vigorously.
7 months ago

William Bronson wrote:

I find no insulative  bricks locally, and the dense firebricks are expensive,so I am planning to cast slabs of perlite/rapidcast/rockwool fibers , for the fire box.

You might want to re-think the cast slabs mentioned above. Rapidcast will not live long in the environment of the burn chamber. Look for refractory cement instead, it comes in premixed tubs or in powder form. Rapidcast is Calcium Aluminate and is only good to about 900F, after that the water in the crystalline structure begins to break down and evaporate and the structure will flake apart. Refractory cement has enough Calcium Aluminate to set hard at room temperature and the primary binders begin to fuse at temps above 1000F and are good to somewhere higher than 2400F. 1400F to 1600F is the standard temps inside a rocket stove burn chamber. Refractory cement is somewhat more expensive but your project will last many years instead of a few months.
1 year ago
Any of the water glass / sodium silicate products will work, or you can make your own from lye and kitty litter crystals. Fire clay is available from pottery suppliers online or from the same places where you buy fire brick. Another choice is fire place mortar, usually available from companies that sell and install fireplaces; it comes as both powder and in 5 pound tubs, premixed.
1 year ago