Chimney flues

My first one of these to see installed kinda interesting

Interesting,…it looks like most of their indoor application is for liquid propane only, eh, Charley?

Charley did they remove an old chimney and replace it with that isokern one? I’m trying to understand what I’m seeing

Looks like a new construction with a steel frame to support a decorative section of chimney above the roof line and the isokern running inside.

Duh. That makes much more sense

That would correct I have been doing IR on the 14,000 Sq footer and the owner asked about the chimney flashing being that every thing else was leaking, two years under construction and still not complete.

seen a few on higher end homes all have been wb/ng


Thanks, Barry. Here are the links I was looking at(scroll down for indoor and outdoor) Maybe I am looking at it wrong?:

i see the link layout confusion, Venting & Fuel is for all approved types
as you can see 40 is only rated for Outdoor
i had questions my first go-round and called 800.642.2920

Exterior photo please.
Flashing photos too please.

IMO its not code.

There older cousins are not allowed in Montreal.It’s the same idea.
This should be considered a chimney.

Chimney for wood burning must have 2 walls of masonry and a flue.
It is not doubled masonry.

It’s a exposed flue not a chimney.

Question; Why did they not use CMUs from a foundation up.
I suspect because of cost, clearance and other factors.
It needs a good foundation ether way.
The weight is being transferred on the posts.
The H beam is to carry the load. That’s all.

Insure the load is being transferred (support ) laterally.
If only the post are carrying load the transfer points will be at the base.
All the posts should be cross braced.
The lateral bracing does little with that weight/hight combination in my opinion.
Sear loading from the atmospheric conditions will work the timbers.

This should be looked at and considered a wood burning chimney in my opinion.
Read the manufactures own means of installations bellow.
I will try to get more on this when I get back home.

SUSPECT: The wood burning chinmey has insufficient masonry to provide fire/smoke protection.
A wood burning chimney is required to have 2 layers of masonry and a flue.
The flue be specific for solid or liquid/gas fuels.

Natural/propane gas exhaust is acidic by nature, burns at a lower temperature than solid fuels and will decompose clay and concrete at a rapid pace when be used.

Terracotta flues are mostly used for wood burning chimney as the liner.
Stainless/galvanised liners are inserted in flues for liquid/gas burning fire places.

RECOMMEND a licensed masonry company specializing in chimney erection evaluate the structure.
LIMITATION. From the attic.

Manufactures literature; Our EM40 Universal Flue is the largest insulating chimney available worldwide, with proprietary “Air-Vent” technology which will not crack like cheap concrete alternatives.

In most cases of a stand alone Outdoor Fireplace where the fireplace is not covered and is at least 10 feet away from the home, 4 courses of the EM40 Mono Chimney Flue are appropriate as each unit is 6" high (10’ / 2’ rule).
Question to ask;
Does it qualify as a chimney?

Thanks, I was reading it wrong…appreciate the follow up help. :slight_smile: