Many wood-burning stoves come with the choice of attaching the flue pipe to either a top or rear flue exit. All things being equal, it’s best for a flue pipe to go up in a straight line in order to achieve the best draw and most efficient burn from your woodburner. This is the set-up we will use here. Also with a twin wall flue we go directly outside.

For the adaptor you have the following options:

- Single to twin wall adapter 
To be pushed into the stove opening; sits inside the spigot of your stove and then connect to other twin wall flue pipe above.

- Single to twin wall adapter - conical (for a better look)
This insulated twin wall conical adapter is used to connect the stove to the twin wall flue system; you can insert it into the stove's spigot being sure to cut the adapter down making it flush.With its tapered design it is more aesthetically pleasing than the standard adapter.

The distance can be calculated as:  distance = G + E + D

G = distance heart of stove outlet - to- wall
E = thickness wall
D = distance outside wall - to - flue  (usually 70mm, but can go up to 360mm in case you want to go along a overhanging roof, without using elbows)

If the distance is fixed (you can not move the stove forward or backward) you will most likely need an adjustable T135 piece. When you have some flexibility in the distance between stove and wall; you can do with a - cheaper - simple T135 piece.

Together with the T135 piece, we will add:
- the adapter,
- the 45 degree elbow
- the wall sleeve. The wall sleeve is meant  to slide through the wall and to be cut to length as required. Add mortar around outside of it or fireproof insulation.
- 2 finishing plates, to cover the opening between the flue and the wall; both inside and outside.

We need to calculate how many straight elements we need going upwards

Determine what the height (X) of the flue outside should be from the T upwards

To determine the required height on the roof (M)  see " Complete information" below.

You now can calculate how many mtrs of straight pipes are needed to get to the required height on the roof. 

Total height of the flue (Z) = M + L - K
L = Height of the roof
K = Height of the stove

Height of the flue outside (X) = Z - V 

V = height coming from the parts going outwards (it is written  top right in question 2" ...."mm upwards")

Check: The total height (Z) from stove to end cap should be at least 3.5 meter. 
You do not need to have the exact height, higher is also okay.

You need a base support unit underneath the T135 piece, to carry the weight of the flue.

This will automatically be added to your shopping cart.

Type of Wall support bracket
Normally the wall brackets with a 70mm distance wall - flue should be taken.
Or you can take a higher distance if you want to pass along an overhanging roof without an offset.

Number of wall supports
We recommend to use a wall support bracket every 3mtr along the wall.  So every 2 - 3 mtr above the T135 piece; 1 wall support.

There are 3 type of rain caps to choose from:

Rain cap
Will keep vertical falliung rain out of the flue. In case of side winds, rain will enter the flue. In case of a flue outsie this is not a problem, as it can float out through the soot collector.

Rain cap with mesh
The mesh will keep birds from building a nest in your flue.

Weathering cap
Keeps rain out of the flue. Also blocks downwinds from entering your flue. Downwinds come from higher objects in the vicinity (up to 10mtr), and they will blow the smoke back into your house.

You need to support the flue over the roof if the free end becomes too long and requires additional support. We recommend to use a guy bracket and the telescopic support if the free end is more than 1,5m.

Every connection above the last support except for regular narrow locking band should be additionally secured with a wide locking band.