5.9.7
Combined flue outlet/air inlet system
Unit category : C43
IMPORTANT
A roof outlet through a Combination Air Supply-combustion gas
•
outlet system is permitted.
For the communal combustion gas outlet hood and air supply
•
hood, a declaration of no objection or a Gas certificate from the
Gastec Gas institute is required.
The passage of the pressure balancing opening at the bottom of
•
the communal air supply and flue gas outlet system is equal to
0.44 times the flue gas outlet surface.
The communal air supply and the communal output of the combustion gases may be
carried out concentrically or separately.
Permitted pipe length
For parallel: Air supply and combustion gas outlet together, excluding the length of the
combi feedthrough.
For concentric: total pipe length, excluding the length of the combi feedthrough.
EHOBG12ABV1
EHOBG18ABV1
The minimum diameters of the communal air supply and flue tube system based
on the continuation sheet 2001-02 inspection requirements no, 138 of Gastec.
EHOBG12ABV1 & EHOBG18ABV1
Number
of units
Concentric
Flue gas
Air supply
2
135
253
3
157
295
4
166
311
5
175
328
6
184
345
7
193
362
8
201
376
9
210
393
10
219
410
11
228
427
12
237
444
13
246
461
14
255
478
15
264
494
16
272
509
17
281
526
18
290
543
19
299
560
20
308
577
Daikin Europe NV
Parallel
Concentric
Concentric
60/100
80/125
100 m
10 m
100 m
10 m
Parallel
Flue gas
Air supply
135
214
157
249
166
263
175
278
184
292
193
306
201
318
210
332
219
347
228
361
237
375
246
389
255
404
264
418
272
431
281
445
290
459
299
473
308
488
29 m
29 m
32