Jotul Oslo - smoke backing up... stumped....

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skytow

Member
Hearth Supporter
Jan 10, 2010
21
SE PA
I have a 6 year old Jotul Oslo which I bought new and has been an awesome stove. Recently I have been getting smoke in the house when loading. I have had tremendous draft in the past and never had this happen before. I hate the smell of smoke in the house!

I let the stove cool completely and removed the burn tubes and vermiculite plate and mineral wool and inspected the whole thing. It was all clean with just some minor fly ash. I vacuumed out ALL of the stove and the rear venting pipe that attaches to my liner. The liner is full stainless to the top of a masonry chimney 32 feet high. Again, in the past I had GREAT draft. Sometimes too much. I had the liner and stove cleaned by the same service I have been using in the past this fall and nothing stood out as unusual. I've burned about 4-5 cords so far this winter. My wood this year is dry. I cut it and stacked it all over the last 1-2 years. (I try to stay about 2 years ahead)

The stove burns fine once up to temp which I run at 450-550 depending on how cold it is outside. Nice secondaries, good heat, clean glass - everything seems perfect until I open up to load it. I know wind can impact this but, wind or no wind, I have the same issue.

I find it hard to believe but it is acting as if I have a restriction in the liner or maybe at the cap and need to have it cleaned again. Cleaning is a pain as my roof is really steep and the chimney is central to the house so you have to walk on the roof which I won't do. Am I missing anything?
 
Check if the wire mesh bird screen on the chimney cap is clogged up.
 
Cap is a prime suspect, happening to a lot of folks this year. Got a pair of binoculars you can use to have a look?
 
Yep, cap is the suspect, though the upper part of the chimney liner could also be getting plugged up if the wood wasn't well seasoned. 32' chimney is up there. I think I need to get into the drone chimney cap inspection service.
 
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All great comments!! I was out with the binos today looking at it just after I lit the fire. It is black and I suspect the cap more than anything BUT smoke was billowing out as normal on a cold start up. Ice storm today so Its going to be a while before anyone can get up there...

Stove is putting out the heat now and I've been staging the wood as I prepare to load it so I have minimized the time the door is open and thus, the issue temporarily.
 
Maybe anything else that may draw air into the house (bathroom fan, range hood etc.) and cause a negative pressure? Does opening a window close to the stove help before opening the door?
 
I second Grisu's comment openning a nearby window.

I have intermittent smoke spillage issues, too with the Progress. In 2 out of 2 cases I opened a window and wow the smoke spillage stopped. I can't figure out why it's intermittent, no fans running that I know of.
 
I don't load my stove if there is still enough wood in it to smoke. Can you just wait till its burned down before reloading? But that cap cleaned out as soon as possible!
 
Does your cap have a screen around it? Not sure about this but with 32' of pipe and a screen, maybe you have some ice build up from condensation.

Just throwing this out since it has been so cold/snowy and you stated that you had never had the problem before.
 
I have seen a bunch of clogged caps this season. No matter the wood or the chimney height. It's been a strange year.
 
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Thanks all been traveling so no time read or reply!!

Opening a door helps and really cold outside helps- all great suggestions. Neither eliminates the problem particularly now that it is warmer.

Burning oil for now and hopefully my heating season is coming to an end soon anyway!

I'd really like to get my chimney / cap cleaned ASAP so I can see if that solves the problem.

Thanks for confirming my suspicions.

JD
 
Opening a door helps

Do you maybe mean window or door to the outside? If any of those two helps it suggests that your home is rather airtight. You should think about adding an outside air kit to your stove then.
 
Wanted to update....Problem solved!

It was the screen in the cap that was clogged and causing my poor draft and smoke backing up. The old Oslo burns like it should now...woo hoo! Wood heat again!! Long story short my service was cleaning from the bottom (at my direction-doh!) and crud simply built up in the cap / screen. Lesson learned when they went up top and cleaned it out. Took 5 minutes and I'm back in business!

Hope this helps someone else out in the future.

JD
 
Good to know and thanks for updating.

I can't wait to see the condition of my single wall pipe extension sticking 2 feet above the insulated SS liner. I've heard it's a bad idea not to convert to class A pipe when exiting a masonry flue from SS insulated liner. It's been the coldest winter ever in Boston so this was a good test year,
 
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