34
KC 28 - KRB 28 - KR 28
Minimum permissible length of horizontal coaxial pipes is 1 meter.
Maximum permissible length of Ø100/60 mm horizontal coaxial pipes
is 9 meters.
Maximum permissible length of Ø125/80 mm horizontal coaxial pipes is
13.5 meters.
For each additional 1 meter of straight pipe maximum permissible
length is to be reduced by 1 meter.
For each additional 90° elbow, maximum permissible length is to be
reduced by 1 meter.
For each additional 45° elbow, maximum permissible length is to be
reduced by 0.5 meter.
The wall terminal reduces maximum permissible length by 1.5 meters.
The air intake duct is to be tilted down by 1% toward its exit, in order to
avoid rain water to enter it.
The flow resistance of the first elbow shall not be taken into account to
calculate maximum permissible length.
KC 32 - KRB 32 - KR 32
Minimum permissible length of horizontal coaxial pipes is 1 meter.
Maximum permissible length of Ø100/60 mm horizontal coaxial pipes
is 7 meters.
Maximum permissible length of Ø125/80 mm horizontal coaxial pipes is
10.5 meters.
For each additional 1 meter of straight pipe maximum permissible
length is to be reduced by 1 meter.
For each additional 90° elbow, maximum permissible length is to be
reduced by 1 meter.
For each additional 45° elbow, maximum permissible length is to be
reduced by 0.5 meter.
The wall terminal reduces maximum permissible length by 1.5 meters.
The air intake duct is to be tilted down by 1% toward its exit, in order to
avoid rain water to enter it.
The flow resistance of the first elbow shall not be taken into account to
calculate maximum permissible length.
Type C33
KC 12 - KRB 12 - KR 12
Minimum permissible length of vertical coaxial pipes is 1 meter.
Maximum permissible length of Ø 100/60 mm vertical coaxial pipes is 9
meters.
Maximum permissible length of Ø 125/80 mm vertical coaxial pipes is
13.5 meters.
For each additional 1 meter of straight pipe maximum permissible
length is to be reduced by 1 meter.
For each additional 90° elbow, maximum permissible length is to be
reduced by 1 meter.
For each additional 45° elbow, maximum permissible length is to be
reduced by 0.5 meter.
The roof vent terminal reduces maximum permissible length by 1.5
meters.
KC 24 - KRB 24 - KR 24
Minimum permissible length of vertical coaxial pipes is 1 meter.
Maximum permissible length of Ø 100/60 mm vertical coaxial pipes is
10 meters.
Maximum permissible length of Ø 125/80 mm vertical coaxial pipes is
14.5 meters.
For each additional 1 meter of straight pipe maximum permissible
length is to be reduced by 1 meter.
For each additional 90° elbow, maximum permissible length is to be
reduced by 1 meter.
For each additional 45° elbow, maximum permissible length is to be
reduced by 0.5 meter.
The roof vent terminal reduces maximum permissible length by 1.5
meters.
KC 28 - KRB 28 - KR 28
Minimum permissible length of vertical coaxial pipes is 1 meter.
Maximum permissible length of Ø 100/60 mm vertical coaxial pipes is 9
meters.
Maximum permissible length of Ø 125/80 mm vertical coaxial pipes is
13.5 meters.
For each additional 1 meter of straight pipe maximum permissible
length is to be reduced by 1 meter.
For each additional 90° elbow, maximum permissible length is to be
reduced by 1 meter.
For each additional 45° elbow, maximum permissible length is to be
reduced by 0.5 meter.
The roof vent terminal reduces maximum permissible length by 1.5
meters.
KC 32 - KRB 32 - KR 32
Minimum permissible length of vertical coaxial pipes is 1 meter.
Maximum permissible length of Ø 100/60 mm vertical coaxial pipes is 7
meters.
Maximum permissible length of Ø 125/80 mm vertical coaxial pipes is
10.5 meters.
For each additional 1 meter of straight pipe maximum permissible
length is to be reduced by 1 meter.
For each additional 90° elbow, maximum permissible length is to be
reduced by 1 meter.
For each additional 45° elbow, maximum permissible length is to be
reduced by 0.5 meter.
The roof vent terminal reduces maximum permissible length by 1.5
meters.
3.2.6.3. Air intake and flue gas venting via 80 mm split pipes
The information given above is with reference to air intake/flue gas venting ducts made from smooth, rigid pipes approved and
supplied by the manufacturer.
Installation types C43 - C53 - C83
KC 12 - KRB 12 - KR 12
Minimum permissible length of air intake pipe is 1 meter.
Minimum permissible length of flue gas venting pipe is 1 meter.
Maximum permissible length of air intake/flue gas venting pipes is 152 meters (combined length of air intake and flue gas venting pipe).
For each additional 1 meter of straight pipe maximum permissible length is to be reduced by 1 meter.
For each additional 90° elbow, maximum permissible length is to be reduced by 1 meter.
For each additional 45° elbow, maximum permissible length is to be reduced by 0.5 meter.
The roof terminal reduces maximum permissible length by 5 meters.
The wall terminal reduces maximum permissible length by 4.5 meters.
