If you're strictly a numbers guy, then my insert (74k BTU, 84.7% efficiency) outheats your free stander (73k BTU, 81% efficiency) So maybe inserts aren't too shabby after all?OK I'll bite.. what is the peak BTU/Hr of the insert you recommended.
How does that compare to to a WPH ( 12-73 k BTU/hr *)
For the possibly uninformed , the greater the BTU /hr, the hotter the house
For that matter, what is the efficiency ( again 81% for the WPH *)
Ignore these measures at your peril when choosing
Should these measures be the same for the insert, by all means go for the insert
Well done, JMB, you are well on your way to a warmer house.I just reviewed almost all of those threads. Very informative. So I went to Lowe’s this evening and bought 2 bundles of roxul comfortbat R15 and try to friction fit it above the insert. That was a bad idea so Saturday I’ll be moving out the insert, doing the block off plate with sheet metal and stuffing roxul up the chimney. It seems a lot of people don’t insulate the back and sides. I plan to as I have a exterior brick chimney. Other than durarock what can I use to hold the roxul to the back and sides?
I found that with a similar leaky installation I was able to use Roxul to block off the chimney until I get around to creating a real plate. In fact, the Roxul is working so well that I plan to procrastinate a whole lot more. ;-)Thanks for all the replies guys I appreciate it and learning a lot. That Osburn 2400 is a beast, huge firebox but at $2200, I think for now the CW2900 and Drolet 1800i would be in my price range. I will do research on all of them. Who knows, I'll start searching around for a used one. Great idea about the door rope for getting in between the gap of the block off plate 6" hole.
Here are pictures I took today of the pipe the installers did. I looked around, I think my block off plate will have to be slanted due to the bricks that were knocked out in the back. I have to be honest, first time looking at how they installed it. Seems to me like they didn't need to do THAT much damage to get the pipe down. It seems it'll now be harder for me to do a block off plate. Maybe I can do it higher up?? Anyways, can't do anything about it now.
Anyone selling a bigger fireplace insert in the Indiana/Ohio/Michigan area?!? lol. But seriously.
Ah, OK...so the roxul is only against the air jacket, not the actual stove top...you're good then.The air comes out in the gap between the air control slider and top. With that said, you think I should remove it from above?
I guess I’m confused. The roxul is sitting on top of the fireplace insert. Is that the top of the air jacket like you’re referring?Ah, OK...so the roxul is only against the air jacket, not the actual stove top...you're good then.
I think you are gonna notice a huge difference now...
You said the air comes out between the air control slider and the top...so that means the roxul cant be sitting on the actual stove top, but on the air jacket that surrounds the stove body on insert style stovesI guess I’m confused. The roxul is sitting on top of the fireplace insert. Is that the top of the air jacket like you’re referring?
I can tell you from experience that putting a butane torch on roxul and letting it run doesn't create much odor.We’re kind of getting a smell in here. I wonder if that’s the roxul next to the exhaust or the paint curing off. I painted it with high temp stove paint last fall. I wonder since adding the insulation the metal temp is getting hot enough now to create off gassing? The top of the inserr is 245, door between 400-500 degrees, bottom plate 300, sides 250-300 degrees. Glass is 700 degrees. Interior firebox temp is 930.
I'm not sure I'd be comfortable packing insulation around and on top of the stove (it is outside the jacket), without getting the ok from the manufacturer. I'd probably want at least a little air gap. Might get too hot.We’re kind of getting a smell in here. I wonder if that’s the roxul next to the exhaust or the paint curing off. I painted it with high temp stove paint last fall. I wonder since adding the insulation the metal temp is getting hot enough now to finally create off gassing from the high temp stove paint? The top of the inserr is 245, door between 400-500 degrees, bottom plate 300, sides 250-300 degrees. Glass is 700 degrees. Interior firebox temp is 930. I’ve never registered temps that high since installing it in the fall.
Found 840°f is overfire in an old manual. They don't publish the number anymore, to my knowledge. Measured on the stove top right in front of the jacket, in the middle.You did good. Can deal with final touches later like you said. Do you notice any improvements in heating? Talk with SBI about packing around the stove and most importantly, what is the best way to monitor stove temps on their insert. And what temps is too hot, over firing. If you never over fire the stove, no worries.
Curious, how are you measuring inside stove temp?
Personally I think you'll notice a huge difference in heat output now that your not putting all your heat up the chimney. I've owned two inserts in my life a Lopi Liberty and a Quadrafire 5100, both of them would run us out of a 3000 sf house. Much of it has to do with house design. Best of luck.You can use regular silicone around the perimeter of the block off plate. I myself would install a 2pc plate with the circle cut out to cover the square hole left around the liner penetration.
From what I have seen, unless I am missing something, your insert does not have a outer casing shell. If that is the case, packing Roxul against it on top side & back while will raise fire box temps, will also insulate & limit heat dispersion from the insert to the room/home. You want heat from the insert to heat the air around it to convect into the home. With a block off plate installed, there is no real reason to insulate the top of the insert at all. There is such a thing as too much of a good thing, and in your case I think you are going to limit heat from being transferred from the insert.
You may want to consider removing the second inner layer of the roxul all around the insert, at least the top and sides. You want it against the old firebox, but not against the insert .
Block off plate is always a must in my opinion. His manual even advises on a block off plate. And surprisingly, they do advise you can just basically stuff Roxul up there, but it does note that a plate is more superior. Kudos to them for giving good info.Personally I think you'll notice a huge difference in heat output now that your not putting all your heat up the chimney. I've owned two inserts in my life a Lopi Liberty and a Quadrafire 5100, both of them would run us out of a 3000 sf house. Much of it has to do with house design. Best of luck.
Different design than what I am used to seeing. Looks like the jacket is part of the insert, rather than a separate shell attached but removable. Also looks like limited space between the jacket & the firebox, with some venting holes on each side.The exterior chimney is worth insulating given insulation is cheap, he is already their working on it and trying to get better insert stove performance.
Here is the diagram specs, albiet the Century specs, as CFM is now Century SBI. It looks jacketed.