34
5.10.7
Combined flue outlet/air inlet system
Unit category : C43
The communal air supply and the communal output of the combustion gases may be
carried out concentrically or separately.
The minimum diameters of the combined air supply and flue system based on the
continuation sheet 2001-02 inspection requirements no, 138 of Gastec.
RKOMBG22AAV1 AND
RKOMBG28AAV1
RKOMBG33AAV1
Number
of units
Concentric
Parallel
Concentric
Parallel
Flue
outlet
Air
inlet
Flue
outlet
Air
inlet
Flue
outlet
Air
inlet
Flue
outlet
Air
inlet
2
135
253
135
214
155
291
155
246
3
157
295
157
249
166
311
166
263
4
166
311
166
263
176
330
176
279
5
175
328
175
278
186
349
186
295
6
184
345
184
292
196
367
196
311
7
193
362
193
306
206
386
206
326
8
201
376
201
318
216
404
216
342
9
210
393
210
332
226
423
226
358
10
219
410
219
347
236
442
236
374
11
228
427
228
361
247
463
247
391
12
237
444
237
375
257
482
257
407
13
246
461
246
389
267
500
267
423
14
255
478
255
404
277
519
277
439
15
264
494
264
418
287
538
287
454
16
272
509
272
431
297
556
297
470
17
281
526
281
445
307
575
307
486
18
290
543
290
459
317
594
317
502
19
299
560
299
473
328
614
328
519
20
308
577
308
488
338
633
338
535
IMPORTANT
•
A Combination Air/flue gas system is permitted.
•
For the combined 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.
Содержание GW-30 C22
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