Thanks very much Waulie.. That is definitely a new spec. I see that Tom has added a listing for Durock Next Gen. Good for you and Tom catching that. I am guessing that the addition of perlite is what raised the insulative value.
but if I were actually building for this application I don’t think I would even count on it at all (typical engineer eh?).
That is definitely a new spec.
Waulie said:Here's the link. Chimney sweep online has it listed as 0.39 too.
(broken link removed to http://www.usg.com/rc/data-submittal-sheets/panels/durock/durock-cement-board-submittal-CB399.pdf)
So, now that the kids are asleep I took a closer look at my hearth. I actually have very close to 1.5 inches of cement mortar beneath 1/4 inch tile. That would give me a R-value of at least 0.3. Here's to hoping they are able to knowck that number down a bit.
BeGreen said:fire_man said:Front clearance is measured from the front leading edge of the stove. Its how much hearth you must have in front of the stove.
Are you certain? Normally it is measured from the stove glass.
fire_man said:BeGreen said:fire_man said:Front clearance is measured from the front leading edge of the stove. Its how much hearth you must have in front of the stove.
Are you certain? Normally it is measured from the stove glass.
BeGreen, I think you may be correct about measuring from the glass. I always erred on the conservative side, and when my inspector measured he used the absolute leading edge of the FV. If your stove has an ash lip, you would be penalized by it. I will speak w/ WS about this important detail, but it would be nice to see it in writing.
Norumbega said:At least the delays make a bit more sense now--not only the gov't and labs taking their time, but also WS tweaking and re-testing. Still curious if generating such an "enormous amount of heat" (so as to require additional shielding, etc.) will have an effect on burn times at the lower end and/or running away at the top end. Will be fascinating to find out from people's in-home experiments.
raybonz said:fire_man said:BeGreen said:fire_man said:Front clearance is measured from the front leading edge of the stove. Its how much hearth you must have in front of the stove.
Are you certain? Normally it is measured from the stove glass.
BeGreen, I think you may be correct about measuring from the glass. I always erred on the conservative side, and when my inspector measured he used the absolute leading edge of the FV. If your stove has an ash lip, you would be penalized by it. I will speak w/ WS about this important detail, but it would be nice to see it in writing.
Hi Tony,
My inspector measured from the ashlip too and said this stove barely fit and he was wrong! In reality I have ~19" if measuring from the front door which is what the manufacturer says to do.. I am comfortable that this hearth is fine.. He also said I didn't have enough rear clearance but my chimney is directly behind the stove which protrudes 3' from the combustible wall.. You can point this out during inspection, I wasn't home during the inspection but he passed it anyways.. whew!! The chimney stone behind the stove barely gets over 100 degrees and the floor stays cool however my cats have a surface temp of 140 degrees lol! They may ignite and run through the house burning it to the ground lol..
Ray
fire_man said:raybonz said:fire_man said:BeGreen said:fire_man said:Front clearance is measured from the front leading edge of the stove. Its how much hearth you must have in front of the stove.
Are you certain? Normally it is measured from the stove glass.
BeGreen, I think you may be correct about measuring from the glass. I always erred on the conservative side, and when my inspector measured he used the absolute leading edge of the FV. If your stove has an ash lip, you would be penalized by it. I will speak w/ WS about this important detail, but it would be nice to see it in writing.
Hi Tony,
My inspector measured from the ashlip too and said this stove barely fit and he was wrong! In reality I have ~19" if measuring from the front door which is what the manufacturer says to do.. I am comfortable that this hearth is fine.. He also said I didn't have enough rear clearance but my chimney is directly behind the stove which protrudes 3' from the combustible wall.. You can point this out during inspection, I wasn't home during the inspection but he passed it anyways.. whew!! The chimney stone behind the stove barely gets over 100 degrees and the floor stays cool however my cats have a surface temp of 140 degrees lol! They may ignite and run through the house burning it to the ground lol..
Ray
Ray: Was that inspector out to lunch? How could it not have enough rear clearance when it was a masonry structure behind the stove? If front clearance is really measured from the glass, I wish the stove installation sheet was specific, otherwise its subject to inspector interpretation, and to cover themselves, they will take the safe path. Can't blame them.
raybonz said:fire_man said:BeGreen said:fire_man said:Front clearance is measured from the front leading edge of the stove. Its how much hearth you must have in front of the stove.
Are you certain? Normally it is measured from the stove glass.
BeGreen, I think you may be correct about measuring from the glass. I always erred on the conservative side, and when my inspector measured he used the absolute leading edge of the FV. If your stove has an ash lip, you would be penalized by it. I will speak w/ WS about this important detail, but it would be nice to see it in writing.
Hi Tony,
My inspector measured from the ashlip too and said this stove barely fit and he was wrong! In reality I have ~19" if measuring from the front door which is what the manufacturer says to do.. I am comfortable that this hearth is fine.. He also said I didn't have enough rear clearance but my chimney is directly behind the stove which protrudes 3' from the combustible wall.. You can point this out during inspection, I wasn't home during the inspection but he passed it anyways.. whew!! The chimney stone behind the stove barely gets over 100 degrees and the floor stays cool however my cats have a surface temp of 140 degrees lol! They may ignite and run through the house burning it to the ground lol..
Ray
I think I read that the Progress’ glass is *not* IR reflective. Maybe this gives the larger front clearance. . .
BeGreen said:raybonz said:fire_man said:BeGreen said:fire_man said:Front clearance is measured from the front leading edge of the stove. Its how much hearth you must have in front of the stove.
Are you certain? Normally it is measured from the stove glass.
BeGreen, I think you may be correct about measuring from the glass. I always erred on the conservative side, and when my inspector measured he used the absolute leading edge of the FV. If your stove has an ash lip, you would be penalized by it. I will speak w/ WS about this important detail, but it would be nice to see it in writing.
Hi Tony,
My inspector measured from the ashlip too and said this stove barely fit and he was wrong! In reality I have ~19" if measuring from the front door which is what the manufacturer says to do.. I am comfortable that this hearth is fine.. He also said I didn't have enough rear clearance but my chimney is directly behind the stove which protrudes 3' from the combustible wall.. You can point this out during inspection, I wasn't home during the inspection but he passed it anyways.. whew!! The chimney stone behind the stove barely gets over 100 degrees and the floor stays cool however my cats have a surface temp of 140 degrees lol! They may ignite and run through the house burning it to the ground lol..
Ray
This always should be in the stove's documentation under the hearth requirements. Then there is no ambiguity. Be sure to ask Woodstock to supply written documentation if it is not in the Progress Hybrid manual.
Waulie said:I think I read that the Progress’ glass is *not* IR reflective. Maybe this gives the larger front clearance. . .
I was just told that they are looking at a different glass to reduce the front clearance.
I was also told they are currently looking at 18 inches as measured from the front edge of the stove, not the glass.
I was also told to not count on that R-value being reduced from 0.59, but it is still "possible".
I asked about rear clearances, but the answer was confusing. I gather with the stove pipe shield it was 6 inches from stove pipe to combustables. Not sure exactly if that is the limiting factor or not.
Some numbers should be on their blog soon.
raybonz said:OOps I read that post too quickly, you were referring to the Progress.. Funny thing is he read the specs from my stove manual which were required to be present for the inspection..
BeGreen said:raybonz said:BeGreen said:raybonz said:fire_man said:BeGreen" date="1320003938 said:fire_man" date="1319939754 said:Front clearance is measured from the front leading edge of the stove. Its how much hearth you must have in front of the stove.
Are you certain? Normally it is measured from the stove glass.
BeGreen, I think you may be correct about measuring from the glass. I always erred on the conservative side, and when my inspector measured he used the absolute leading edge of the FV. If your stove has an ash lip, you would be penalized by it. I will speak w/ WS about this important detail, but it would be nice to see it in writing.
Hi Tony,
My inspector measured from the ashlip too and said this stove barely fit and he was wrong! In reality I have ~19" if measuring from the front door which is what the manufacturer says to do.. I am comfortable that this hearth is fine.. He also said I didn't have enough rear clearance but my chimney is directly behind the stove which protrudes 3' from the combustible wall.. You can point this out during inspection, I wasn't home during the inspection but he passed it anyways.. whew!! The chimney stone behind the stove barely gets over 100 degrees and the floor stays cool however my cats have a surface temp of 140 degrees lol! They may ignite and run through the house burning it to the ground lol..
Ray
It's the same for all stoves Ray. The PE manual could be more explicit, but at least they show a clear illustration.
This always should be in the stove's documentation under the hearth requirements. Then there is no ambiguity. Be sure to ask Woodstock to supply written documentation if it is not in the Progress Hybrid manual.
I agree BG however that is what went down while I was at work.. At least he passed it so it's a non-issue.. I'd rather he err on the side of caution but if we know the facts we can always dispute the untruths fortunately he was smart enough to know it was safe.. I am glad I did everything by the book for our safety and peace of mind..
Ray
OOps I read that post too quickly, you were referring to the Progress.. Funny thing is he read the specs from my stove manual which were required to be present for the inspection..
Den said:I don't see why having high output at the top end with the secondary burn would affect the low burn with the cat.
Den said:I don't see why having high output at the top end with the secondary burn would affect the low burn with the cat. I think I read that the Progress' glass is *not* IR reflective. Maybe this gives the larger front clearance. . .
fire_man said:Den said:I don't see why having high output at the top end with the secondary burn would affect the low burn with the cat. I think I read that the Progress' glass is *not* IR reflective. Maybe this gives the larger front clearance. . .
I agree with this comment. I personally saw the air plate that controls intake air. The primary air plate (located in the rear of the stove) shuts completely closed with no air allowed. A small air slot in the bottom front of the stove allows a small controlled amount of primary air to always enter the burn chamber to eliminate backpuffing. The seconday air plate (attached to the primary plate ) does have slots in it that always allows some air intake. The claim is this stove can burn down to a low of 10K BTU/Hr.
Norumbega said:fire_man said:Den said:I don't see why having high output at the top end with the secondary burn would affect the low burn with the cat. I think I read that the Progress' glass is *not* IR reflective. Maybe this gives the larger front clearance. . .
I agree with this comment. I personally saw the air plate that controls intake air. The primary air plate (located in the rear of the stove) shuts completely closed with no air allowed. A small air slot in the bottom front of the stove allows a small controlled amount of primary air to always enter the burn chamber to eliminate backpuffing. The seconday air plate (attached to the primary plate ) does have slots in it that always allows some air intake. The claim is this stove can burn down to a low of 10K BTU/Hr.
Ok, thanks, that's easier to visualize. Is that 10k figure the official EPA result? I thought I read a speculation of 5k, from someone talking to someone at the open house.
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