Lengths Of The Air/Flue Gas Pipes - REMEHA Calenta 25s Installation And Service Manual

4. Installation
L
34
For open exhaust of combustion gases above the roof, the
vent must always be provided with a suitable stainless steel
wire grill.
4.8.3.

Lengths of the air/flue gas pipes

4
4
n Open flue (B23, B23P, B33)
If using an open flue version, the air supply opening remains open;
only the combustion gas opening is connected. The boiler then takes
in the combustion air required directly from the premises in which it
is installed. For the application of air discharge and combustion gas
discharge piping with a diameter other than 80 mm, a reducer should
be used.
CAUTION
4
4
Chimney length for the open flue version
T000765-B
Situation
Free vent in zone I
Restricted vent in
zone III
Countryside (ΔP
static = + 25 Pa)
Restricted vent in
zone III Near the
coast (ΔP static =
+ 40 Pa)
To define the maximum final length, you must deduct
the pipe length in accordance with the reduction table.
The boiler is also suitable for longer chimney lengths
with diameters other than those indicated in the
table. Please contact us for further information.
The air supply opening must remain open.
The premises in which the appliance is installed must
be fitted with the necessary air supply openings.
They must not be reduced or closed.
Diameter
Calenta
25s
60 mm 19 m
70 mm 35 m
80 mm 40 m
90 mm 40 m
60 mm 15 m
70 mm 28 m
80 mm 40 m
90 mm 40 m
60 mm 12 m
70 mm 23 m
80 mm 40 m
90 mm 40 m
Calenta 25s - 28c - 35s - 40c
Maximum length (L)
Calenta Calenta Calenta
28c 35s 40c
16 m 11 m 10 m
30 m 21 m 19 m
40 m 40 m 40 m
40 m 40 m 40 m
13 m 9 m 9 m
24 m 17 m 16 m
40 m 40 m 39 m
40 m 40 m 40 m
11 m 8 m 8 m
21 m 14 m 14 m
40 m 35 m 35 m
40 m 40 m 40 m
040412 - 7600585-01