Flue Calculator

Step 1 Fireplace series

Step 2 Model

Step 3 Flue fan / terminal location

Step 4 Estimated total flue length

m

Step 5 Changes of direction

Total changes of direction Max 10 in any flue run
0
In the rigid PolyPro run These need elbow kits
0
Of those, 45° Rest treated as 90°
0

Chimney cap (optional)

✓
Galv liner extension 906627 — 240mm × 225mm Ø, where the liner sits on the chimney cap

Step 6 Exposed flue in the room (optional)

✓
Black outer flue in the room Shroud over the visible flue — does not change flue length
mm
✓
Offset the in-room flue Adds one offset bend kit (include its length above)
Additional storeys Extra ceiling plates (906627)
0

A black ceiling plate (906627) is included automatically where the flue passes the ceiling.

Step 6 In-room flue (freestanding)

mm

mm
✓
Offset the in-room flue 45° offset — adds diagonal flue, black liner and one offset kit
mm
Additional storeys Extra ceiling plates (906627)
0

Step 6 Raise wall penetration (optional)

✓
Raise the wall penetration Adds black liner before the 90° exit (4m black liner max)
mm
Required components

This tool is a guide only. All installations must comply with AS/NZS 5601.1 and local gas regulations, and with the relevant Escea / Mode flue specification guide and installation manual. Flexible flue is cut to length; PolyPro is rigid 1m sections. Termination clearances and the 1.5m maximum vertical run below the fireplace must be verified on site. For installations outside these parameters contact the Escea Architectural Advisory Team.

Step 1 — Cowl height method

600 < 3000

Option A

Flue penetration within 3 m of the roof's highest point

The cowl sits 600 mm above the highest point of the roof.

3000 clear 1000 MIN. > 3000

Option B

Flue penetration more than 3 m from the roof's highest point

The cowl sits below the ridge. Raise it (from 1000 mm minimum) until a 3000 mm horizontal line clears the roof surface.

Step 2 — Enter dimensions

Fireplace type

Base height

mm

Ceiling height

mm

Ceiling pitch (optional)

Custom made — refer to the Escea Architectural Advisory Team for drawings. Not a stocked item.

Roof height

mm

Offset & penetration (optional)

Used: 0 of 1 max

✓
Offset inside the room Double skin offset — 903642
✓
Offset in roof or outside Insulated offset — 903670
✓
External wall penetration Adds 903669 + 903665 + 903671 + 903672 + brackets

Only one offset is permitted within any flue length (wall penetration counts as the offset). Deselect the current one to choose another.

mm

Upper storeys with visible flue (optional)

Additional storeys 2× 903647 per storey
0

Required components
🔥
Adjust inputs to generate
a component list.
Elevation
📐
Adjust inputs to generate
an elevation.

This tool is a guide only. All installations must comply with AS/NZS 2918 and local building regulations. Insulated flue components cannot be cut down — extension lengths combine from the 1200 / 900 / 600 / 300mm kits. For installations outside these parameters contact the Escea Architectural Advisory Team.

Offset cut length

Enter the horizontal offset for a 45° flue offset (a pair of 45° bends). The calculator returns the straight pipe length to cut between the bends, for each pipe diameter.

mm

Non-compliant — AS/NZS 2918

This offset exceeds the maximum allowable 150 mm pipe offset of 1800 mm and is non-compliant with AS/NZS 2918.

Seek professional advice

This calculator no longer applies. Please contact the Escea Architectural Advisory Team for guidance.

150 mm

—

mm

200 mm

—

mm

250 mm

—

mm

Cut length is the straight 150 / 200 / 250 mm pipe between the two 45° bends, derived from the horizontal offset less the fixed bend legs. All installations must comply with AS/NZS 2918. For offsets outside the calculator's range contact the Escea Architectural Advisory Team.