Complete black twin wall flue kit straight for a garage

Approved Document J requires a minimum of 4.5m from stove collar to terminal. On low-height buildings such as garden houses this can be difficult to achieve. Shorter systems will work but may have reduced draw, especially during lighting. Most customers go for at least 3m height.

There are two ways to build your flue:

Only twin wall flue pipes

- No dangerous hot pipes in the room.

- Esthetically more pleasant.

- Better draw.

Single wall and twin wall pipes

- A single wall flue radiate warmth into the room ( this does reduce the draw somewhat as well).

- The single wall pipes can be used up till 450mm under a flammable roof (150mm for a non combustable roof).

- Single wall pipes should stay 450mm from flammable walls and other flammable materials (unless sheilded like on picture).

The choice of the flashing depends upon:

- What kind of material material is covering the roof, and

- The pitch of the roof (0° being a flat roof, 60° a sharp roof)

Automatically we ad a roof support and -when required- a storm collar.

There are 2 types of cap to choose from:

Rain cap
Will keep vertical falling rain out of the flue. In case of side winds, rain will enter the flue. In case of a flue outside this is less of a problem, as it will not floote into the house. 

All weather Cowl
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 without this Cowl they will blow the smoke back into your house.