Help with hearth extension and chimney height

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rick clifford

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Oct 19, 2012
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This is a great forum and have learned a lot but wondering as I am about to install a Hampton HI300 I see my hearth extension clearance is short by 4 inches or so. I need 18 from the door and as I want to have this to code I don't want to delay me using the insert. Is there anything (a mat or something) that will meet code until I get to doing a permanent install in Spring.
Also, My chimney does not extend 2 feet above the ridge which is only about 5 feet away. Again is there anything to install to meet the required height until I can brick up the chimney in Spring. How it looks is not a concern as I I only want heat this winter in a safe/to code manner. Thanks in advance
 
You can easily make something also .I have an H300, which is the freestanding model. I think the requirements would be the same but certainly double check. You need .8r value of material. So something as simple as 2 pieces of 1/2in durock cement board would suffice. There are other products too but durock is the cheapest i believe. Your manual should have a chart with different materials listed and their r values. Or the charts are easily to find online too. As far as the chimney goes you can add a section of class A to the top to extend it, depending on how high you go it may need to be braced.
 
begreen said:
Yes, you can put down a hearth extension board. Stove shops and Amazon sell them.
http://www.amazon.com/Black-Hearth-Extender-18-48/dp/B00LH39MK8/ref=sr_1_1?s=hi&ie=UTF8&qid=1419708999&sr=1-1&keywords=hearth extension
How much height do you need to gain?
Click to expand...

Thanks for the extension board info. The height is hard to tell from the ground but at least 18 inch extension or possibly as much as 24 inch. I heard I could place a section of type A pipe on top but wondering if its true and if so how is it secured to the chimney
 
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Most class A manufacturers sell a special anchor plate that can be used to connect the liner to the class A chimney. I would ask a specialized chimney/stove shop for the right part or call the customer service directly.
 
begreen said:
You could put a flue liner extender on.That is going to be much less expensive than a temp class A extension if the intent is to brick the chimney up higher.
http://www.woodlanddirect.com/Chimney/Chimney-Liner-Parts/Flue-Extender
http://www.rockfordchimneysupply.com/rockford.php?p=FlueExtender
Click to expand...

Wow that's great. I hope I only need 18 inches and it meets code. Cant wait to have this thing burning. Last thing, I assume as the extension in not in the chimney it does not require insulation. Correct?
 
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