Flue Systems for Cubic Mini
Cubic Mini Wood Stoves is a small stove manufacturer based in Canada. Their small Grizzly stove and even smaller Cub stove are popular choices for very small spaces, or spaces that don't need very much heat.
Note: Tiny Wood Stove is not affiliated with or endorsed by Cubic Mini Wood Stoves.
Can I connect my Cubic Mini to Tiny Wood Stove's 3" flue systems?
Yes! Our 3" flue systems are a popular option for safely venting a Cubic Mini stove in tiny houses, cabins, vans, RVs, buses, yurts, and all sorts of small spaces.
Since our flue system is modular, it makes a very nice detachable chimney for use on vehicles. It would be a little harder to do that with Cubic Mini's kit since the outer wall, inner wall, and insulation are separate pieces.
We also offer 3" 45 degree elbows, so you can offset your chimney with one of our flue kits. Cubic mini only offers straight pipe.
The Cubic Mini flue flange is a little smaller than a standard 3" pipe, so you'll want to use our Cubic Mini adapter. If you prefer not to use the adapter, you can hack the pipe a bit to make it fit.
If you are using the Cubic Mini Wall Mount
Because the stovepipe in a wall mount configuration is so close to the wall, you can't use any single-wall pipe in a wall mount configuration. Single-wall pipe requires 18" clearance to combustibles which can be reduced to 6" with a proper heat shield. Double-wall pipe generally requires 9" clearance to combustibles which can be reduced to 3" with a proper heat shield. (Note in Cubic Mini's product description: "Our flue pipe require a 3" clearance to combustibles with flue flashing the entire length." Emphasis mine.)
You can use Cubic Mini's double-wall pipe for your connector pipe between your stove and the insulated chimney pipe, and Cubic Mini's heat shield kit the entire length. Use our Cubic Mini adapter to connect the top of the Cubic Mini double-wall pipe to our single-to-double adapter below your ceiling. Then continue through the ceiling with our insulated pipe all the way to the roof vent.
Alternatively, you can attach our 3" insulated pipe directly to the Cubic Mini flue flange. Use a set of sheet metal crimpers to crimp the inner wall of the pipe to fit inside the flue flange. We can also do this for you if you note your request in your order comments.
If you're using a floor mount, or mounting the stove on a cabinet
If you have at least 18" between the stovepipe and combustibles, or 6" with a proper heat shield, you can use single-wall pipe. Cubic Mini doesn't recommend using single-wall pipe with their stove, but in our experience, it works well for limited lengths of connector pipe. Mount our Cubic Mini adapter on the stove's flue flange, then continue with our single-wall pipe to the single-to-double adapter included in one of our 3" installation kits.
Using our single-wall pipe is especially helpful if you need to offset your chimney from the stove, since you can use a set of our 45 degree elbows with our single-wall pipe. Cubic Mini doesn't recommend using 45 degree elbows for their stoves, but in our experience, two 45s works fine with an otherwise well-designed flue system.
If you don't need elbows in your connector pipe, you can use Cubic Mini's double-wall pipe instead of our single-wall pipe if you like. Use our Cubic Mini adapter on top of the Cubic Mini pipe to adapt to our single-to-double adapter. Then continue through the roof in insulated pipe, all the way to the chimney cap.
Finally, if you want to use an all insulated chimney, you can attach our insulated pipe directly to the Cubic Mini flue flange. Use a set of sheet metal crimpers to crimp the inner wall of the pipe to fit inside the flue flange. We can also do this for you if you note your request in your order comments.
How does Cubic Mini's Kit Compare to Tiny Wood Stove's Kit?
Tiny Wood Stove's kit costs more, but it is more complete, more modular, and offers more options for your small stove installation.
Pipe
Tiny Wood Stove's kits include complete sections of modular Class A pipe. Cubic Mini's kits do not include the 3" inner wall, so you'll need to buy that separately and assemble it yourself. If you're using your chimney in a structure that moves, complete modular pipe makes it easy to take down and set up a detachable chimney. We also offer a driving cap to block off your chimney while you're moving, or for off-season storage.
Tiny Wood Stove's pipe is also higher-quality seamless cold-rolled and welded pipe. Cubic Mini's pipe is snap-lock, so there's a visible seam up the side.
Elbows
Cubic Mini does not offer any elbows for their pipe, so you have to do a straight roof exit. If you need to offset your chimney, you can use Tiny Wood Stove's kit with 45 degree elbows.
Roof Vent
Tiny Wood Stove also includes more features and options. Our 3" roof vent includes side shields to protect your chimney against driving rain and high winds. Cubic Mini's roof vent leaves insulation exposed at the top of the chimney, but Tiny Wood Stove's fully trims the top of the pipe.
Roof Support
Our 3" Roof Support is more robust to hold your chimney steady even in high winds or on a moving vehicle. And our 3" telescoping pipe makes installation and maintenance easy, and absorbs vibrations for mobile installations. An available extended roof support bracket provides extra lateral support for tall chimneys or high-wind areas.
Pipe Boot
Cubic Mini uses a black EDPM pipe boot that's only rated for low-temperature applications, up to 212° F. Our kits include a high-temperature 100% silicone boot which withstands 392° F continuous or 482° F intermittent. While the insulation around the chimney pipe does keep it cooler than single-wall pipe, the outside of the pipe still gets very hot during normal operation. Exceeding the rated temperature of the boot can cause premature failure and roof leaks. That's why we use a high-temperature silicone boot designed for the application, not a low-temp EDPM boot.
See the full side-by-side comparison below.
Tiny Wood Stove 3" RV/Bus Kit
- Included - Roof Vent w/ Spark Arrestor Screen and Wind Shield
- Included - High-Temp Silicone Pipe Boot
- Included - Ceiling Trim Plate
- Included - Heavy-Duty Roof Support Brace
- Included - Single-to-Double Adapter
- Included - Complete, Modular Class A Insulated Pipe
- Included - Clamps for Securing Joints ($46 Value)
- Included - Stove Cement ($8 Value)
- Included - Telescoping Pipe ($45 Value)
- Available - 45 Degree Elbows for Offsets
- Available - Driving Cap for Mobile Installations
- Available - Extended Roof Support for Tall Chimneys
Cubic Mini Metal Roof Exit
- Included - Roof Vent w/ Spark Arrestor Screen
- Included - Low-Temp EDPM Pipe Boot
- Included - Ceiling Trim Plate
- Included - Roof Support L-Brackets
- Included - Single-to-Double Transition Trim
- Included - 5" Outer Wall and Insulation
- NOT INCLUDED - 3" Inner Wall (add $48.00)
- NOT INCLUDED - Clamps/Screws (add $??)
- NOT INCLUDED - Stove Cement (add $8.00)
- NOT AVAILABLE - Elbows
- NOT AVAILABLE - Driving Cap for Mobile Installations
- NOT AVAILABLE - Extended Roof Support for Tall Chimneys
How to exit through the wall with a Cubic Mini
We don't recommend using a wall exit with a 3" stove. In our experience, stoves with a 3" flue outlet are simply not powerful enough to draft reliabily with a wall exit. You really need a well designed roof exit for a 3" stove like a Cubic Mini.
If you need a very small stove that will work with a wall exit, we recommend the Dwarf 3kW Standard. The Dwarf 3kW is only slightly larger in output than the Cubic Mini Grizzly, but uses a 4" flue system, and can be installed using our 4" Wall Exit Kit.
Need help with your project?
Drop us a line at support@tinywoodstove.com if you need some help picking out your flue parts, or if there's anything else we can do to help with your project.
Do you sell flue systems for Northwoods stoves? Thanks.
Kenneth-
Yes, we do! Northwoods Fabrication uses standard flue sizes, so you don’t need any kind of adapter to connect it to our flue kits. Just run your space through Floo the Parts Robot or drop us a line to support@tinywoodstove.com.
If you have the option, get the stove with the flue flange. There’s a version that just has the hole in the top with no flange, and it’s more difficult to get a reliable connection to the stovepipe without a flange. If you do have the version with no flange, we recommend adding some stove gasket material around the male end of the pipe before cementing it into the hole.
Are your stoves EPA approved
And are they 2020 compliant?
Thanks
Brian- Thanks for the message. No, our Dwarf stoves are not EPA approved for residential use. The Dwarf is meant for temporary or recreational structures like tiny homes on wheels, RVs, buses, tents, yurts, etc., that not subject to residential building codes. This article is about Cubic Mini flue systems, so it’s probably worth mentioning that Cubic Mini stoves are also not EPA approved for residential use either.
Are your mini woodstoves tagged by a testing agency?
Raoul- Thanks for the message. No, our Dwarf stoves are not UL listed or CSA certified for residential use. The Dwarf is meant for temporary or recreational structures like tiny homes on wheels, RVs, buses, tents, yurts, etc., that not subject to residential building codes. This article is about Cubic Mini flue systems, so it’s probably worth mentioning that Cubic Mini stoves are also not UL listed or CSA certified residential use.
hello there do you sell in quebec ?
Hi Martin,
We do ship to Canada! Orders shipping to Canada are also charged duty upon entering the country. Any duties charged by the Canadian government are not included in your shipping cost and will be billed to you by the shipping company (usually FedEx) along with a brokerage fee for handling the transaction on your behalf.
I have a 6″ diameter chimney already installed in my tiny home. What would be the dangers/downsides of using a 3″ to 6″ adapter and a wall-mounted cubic mini grizzly setup (with 2 x 45 degree elbows to get away from the wall mount). Thanks!
Hi Sebastian,
When you increase the flue diameter you also increase the volume of space that you give to the flue gases. Small stoves just don’t put off enough hot gases to fill the larger spaces. You can often go up a size or two from your existing flue flange with an otherwise well-designed flue system, however, increasing the size from 3″ to 6″ is a pretty big jump and is unlikely to draft well which would mean a hard to light, hard to keep burning, smokey fire. I’d recommend not using a pipe with an inner diameter any larger than 4″ with a Cubic Mini wood stove.