page no. 16 of 44
HEMNVx & HEMSL Range Users, Installation & Servicing Instructions Doc Ref M103 issue 3.6 Mar 2020.
For horizontal type B flued installations a Combustion
Air Inlet and Flue Termination piece is supplied for each
module (two Combustion Air Inlets are supplied with
models HEMNVx 150 & 175). For Vertical type B flued
installations a Combustion Air Inlet and Flue Termination
piece is supplied for each module (two Combustion Air
Inlets are supplied with models HEMNVx 150 & 175).
The total
calculated maximum
permitted length of flue
system for sizes
up to and including model 50 is 14m,
from model 60 to 125 is 16m.
If an offset is required a set
Size
A
B
C
ØD
10-3
399 167
108
91
15-4
399 167
108
91
18-5
399 167
108
91
25-5
443 187 121.5
112
30-6
443 187 121.5
112
40-8
637 187 121.5
112
50-6
443 217 121.5
112
60-7
501 227 145.5 142
75-9
641 227 145.5 142
100-12
848 226 151.5 142
110-13
997 204
181
142
125-15
1137 204
181
142
150-18
1347 204
181
142
175-21
1554 204
181
142
A
B
HORIZONTAL FLUE POSITION
ØD HOLE FOR FLUE SEAL
C
A
B
HORIZONTAL FLUE POSITION
ØD HOLE FOR FLUE SEAL
C
HORIZONTAL FLUE POSITION
ØD HOLE FOR FLUE SEAL
A
B
C
HORIZONTAL FLUE POSITION
ØD HOLE FOR FLUE SEAL
A
B
C
Size
A
B
C
ØD
30-6
453.5 179 121.5 112
45-9
659
179 121.5 112
50-6
453.5 179 121.5 112
60-12
815
188 145.5 142
75-9
651
188 145.5 142
75-15
1172
188 145.5 142
90-18
1333
187 151.5 142
100-12
848
187 151.5 142
125-15
1135
35
180.5 142
150-18
1345
35
180.5 142
175-21
1552
35
180.5 142
200-24
1769
116
181
142
of 45° bends should be used being equivalent to 0.5m of flue
length. 90° bends may be used but each set will be equivalent
to 1.0m of flue length.
For HEM150/175/200 units: use Ø130 flue
system for a total calculated length of up to 3M,
Ø150 for a total calculated length in excess of
3M up to 9M, Ø180 for a total calculated length
in excess of 10m up to 18M and Ø200 for in
excess of 18m up to 24M.
Exhaust flue outlet positions are shown in the following diagrams and tables.