Chimney box confusion - please help

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jl0818

New Member
Oct 27, 2025
1
Maine
Okay, I’m losing my mind over this. Hours and hours searching it just seems silly.
If you don’t want to read all this, here’s the question:
How can I get a alfuel hst support box to fit my Selkirk st 6inch double walled pipe?
All I need is the box

I purchased property a few months ago and I’m remodeling the mobile home that was here. There was quite a few things left on the property, one of them was a few nice 6inch double walled Selkirk chimney pipes.

I replaced the roof, they gave me a heat rated pipe boot. All good.
purchased a chimney pipe cap, all good
I have a (new to me) wood stove, and some single walled stove pipes.

ALL I NEED IS A COMPATIBLE SUPPORT BOX. After reading some descriptions, I’m finding that durvent, and alfuel hst support boxes are not compatible with a Selkirk. I cannot, for the life of me, find a purchasable support box for this darn pipe. I’ve already purchased two only to be contacted by the company for out of stock.
This is so silly! It’s a black steel box! It should be illegal for these company’s to make simple components incompatible. My frustration is indescribable.

How can I get a alfuel support box to fit my Selkirk pipe? it’s the only option available in my area. I’m building a stone hearth this week, I’d love to get the stove in before I freeze lol please, someone help me.
 

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To my understanding Selkirk products are tested and approved using all Selkirk products. Mixing different manufacturers products in a chimney installation isn’t tested and therefore can’t be approved. I THINK that you need a Selkirk ceiling support box if you want to run a Selkirk Class A chimney thru the roof. I believe the black stovepipe can be from a different manufacturer up to the ceiling support box.

I have arrived at this conclusion by my own research and reading posts on this forum. I COULD be wrong so by me replying to your post if nothing else it will bump your post to the top. If I’m giving you bad/wrong advice someone will correct me.
 
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