Mildly sweet chemical smell outside

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
Feb 5, 2020
47
Scappoose, Oregon
Need help troubleshooting a smell. This winter/spring, I've been smelling an occasional slightly chemical but mostly sweet smell outside when I have a fire. Not inside, just outside when I take my dogs out. Almost like a perfume, but slightly chemical.

This season, I've been burning Idaho Energy Logs and one quarter of a Super Cedar exclusively. So my wood is consistent and bone dry. Typically, run my flue temp up to about 700 before turning down where it settles at 550 - 600. Stove top peaks between 600 - 700 before settling in at 550. I've got it dialed like a science.

I've inspected the Chimney from the roof and I don't see any signs of burning or melting. Creosote is a very thin, dry friable texture. Outer wall flue temps range from 200ish at the bottom to 150 - 175 where the pipe meets the ceiling. I do see whisps of smoke during peak burn where there is usually no visible smoke at all, but not much.

Other factors to consider: the previous homeowners who renovated my home installed a rubber lined, commercial roof. By the home inspector's account, it's a higher quality, more durable roof than most residential homes, and when I had the stove installed, the installer subcontracted a specialist in the roofs to install and seal the exterior pipe.

Maybe it's off gassing a bit when it heats up?

I read the thread about the guy with the Vermont catalytic stove but that didn't give me much more info. Just posting in case someone else has this issue or experience with it?
 
Sounds like the smell of combustion. The chimney may appear smoke-free, but there are still volatiles in the flue gases. Combustion is not 100% efficient.
 
  • Like
Reactions: ABMax24
Hope that's it. No idea what wood the Idaho energy logs are made from. You think they could have a sweet smell, huh?
I think they are made from Ponderosa Pine. What does the smoke smell like outdoors?
 
Is there a whole house ventilation system or outdoor fresh air make-up system on the house?
 
Last edited:
i bet it takes more fossil fuel to produce than it saves....much like ethanol.....LOL...Unreal. ...and they STINK.....LOL
No. Infact they do not use more fossil fuels than they save. I have not used that brand but have used others occasionally and I never thought they stunk.
 
i bet it takes more fossil fuel to produce than it saves....much like ethanol.....LOL...Unreal. ...and they STINK.....LOL
They're a byproduct of other industry processes, they do not use more fossil fuels to produce than they use and, lb for lb, they burn hotter than hardwood and can be kept in a smaller space. I have no reason to believe my smell issue is necessarily related to them.

While I prefer to harvest my own wood when possible, and I have plenty of free access to wood, to be honest, some summers (like this last one) I tend to play more than I work, so this makes a nice option since I burn wood to heat 80 - 90% of the season.

4 sticks will heat my home for 12+ hours.
 
Last edited:
I also get that same sweet aromatic smell when burning wood. I find I get it more when burning softwoods like pine, but have also smelt it with birch. I've also noticed it with my parents stove.

I have found I only get the smell when the stove is burning relatively clean, any white or blue smoke and it smells more acrid like traditional wood smoke. Generally when I smell it the plume is clear, and the secondary tubes inside the stove are burning well. Obviously though it's not burning completely to completion, and I believe the fire could be slightly oxygen starved to get this smell.
 
I'll occasionally get a metal burning smell outside when my cat stove is running 100% cat only, just smoldering in the firebox itself, sometimes when at other friends homes I'll smell some different smells then the typical woodstove smoke smell, chalk it up to different woods at different moisture levels.
 
No. Infact they do not use more fossil fuels than they save. I have not used that brand but have used others occasionally and I never thought they stunk.
That's right, they are made from highly compressed sawdust, a waste product of milling. It's a great product and they don't stink. The machinery was designed by an ex-Boeing engineer and is from the 1930s. NIELs are incredibly dense. They sink in water. There is only one other product on the market that is compressed this densely, Homefire's Prest-Logs.

 
making pressure is a much more fuel-economical process than making high temperature (as in refining dino juice).
 
And creating an immense amount of pressure comes from what?
No one is saying it doesn't take any fossil fuels to produce them. Just that it doesn't take more to produce them than it saves
 
Last edited:
I love fossil fuels . I can't live without them. And neither can you virtue signaling renewable energy lovers.
Everything that is so called renewable is presently using a net negative amount of fossil fuel reduction overall, not to mention the afterlife of dead batteries etc. that will be sent to some far off 3rd world country to be dealt with so us first worlder virtuous can feel smug and fuzzy like we made a difference.....LOL....Not to mention the thousands of tax dollars that are being sucked out of already struggling families to fund this renewable fantacy world. but i guess i'm enough off track that your reply will be to give me a time out....LMAO🤣 sorry fe
making pressure is a much more fuel-economical process than making high temperature (as in refining dino juice).

Did you read your reply?...🤣
 
Hydro-powered electicity running heavy duty hydraulics would be my guess. Give them a call and ask.
What built that hydroelectric generator and all that supports it from heavy equipment to move earth to build the plant right down to the gas that got the men there to build and maintain the plant. SMH