Flues Calculator

Select your installation type


Important note! If your installation is a double story, but the fireplace is upstairs - please choose single story option below

Roof type

Second story flue insulated?

Roof steepness

30° and greater is steep.

External eve scenario


Note: Please enter values in cm. 1m = 100cm.

When measuring, things to keep in mind
  1. The measurement point from the floor should be at least 30cm from the wall.
  2. "C" dimension always Apex to Centre line of flue HORIZONTAL
  3. "D" dimension always in roof cavity to apex VERTICAL
  4. "B" dimension always in roof cavity to flue exit point VERTICAL

uses 45° elbows
Click to enlarge

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