3. Mounting and installation
18
3.6
Chimney/flue connection
The Heat Pure is connected to an existing flue. The operational height of
the flue must be minimum 4.5 meter (draught 12 Pa), calculated from
the point at which the flue duct is joined to the Heat Pure.
Take local legislation and environmental factors into a
Table 3: Chimney/flue diameter and firebox per model
Heat Pure
Firebox
(in mm)
Width/height
Firebox (cm
2
)
Minimum fresh
air supply
Type 45
415 / 454
1884
1x Ø 150 mm
Type 60
545 / 470
2560
1x Ø 150 mm
Type 70
305/665
2028
2 x Ø 150 mm
Type 71
655 / 580
3800
2 x Ø 150 mm
Type 85
795 / 360
2860
2 x Ø 150mm
Type 100
570/ 926
5278
2 x Ø 150mm
Type 105
995 / 440
4380
2 x Ø 150mm
Type 110
1045 / 340
3555
2 x Ø 150mm
Type 120
1145 / 340
3895
2 x Ø 150mm
If you want to use a flue diameter that differs from those shown in table
3, use the formula below to calculate a possibly smaller diameter.
sch
so
H
e
F
×
=
sch
F
F
sch
F
so
H
sch
e
flue section in cm
2
surface firebox in cm
2
height of flue in metre measured from the upper
side of the Heat Pure
influence factor between 0.2 and 0.6 determined
by the flue quality: 0.2 with a perfect flue, straight
above the Heat Pure; 0.6 with connectio
than 45°.
3. Mounting and installation
Heat Pure is connected to an existing flue. The operational height of
the flue must be minimum 4.5 meter (draught 12 Pa), calculated from
the point at which the flue duct is joined to the Heat Pure.
Take local legislation and environmental factors into account.
Minimum fresh
Flue
Ø (mm)
1x Ø 150 mm
150
1x Ø 150 mm
180
x Ø 150 mm
180
x Ø 150 mm
250
2 x Ø 150mm
200
2 x Ø 150mm
250
2 x Ø 150mm
250
2 x Ø 150mm
250
2 x Ø 150mm
250
If you want to use a flue diameter that differs from those shown in table
3, use the formula below to calculate a possibly smaller diameter.
height of flue in metre measured from the upper
influence factor between 0.2 and 0.6 determined
by the flue quality: 0.2 with a perfect flue, straight
above the Heat Pure; 0.6 with connection less
