Transfer air solutions

Guide for selecting the right transfer air solution

When standard transfer air diffusers are not suitable due to various circumstances, e.g. sound requirements, air flows or where a flexible installation is needed, several of Swegon's products can be combined to solve this.

There are several solutions depending on whether installation is to be done through wall, ceiling to ceiling or ceiling to wall.

Quick selection

The table shows the Rw value with different combinations of transfer air, where Swegon’s sound attenuators, air diffusers and duct components are included.

AIR FLOW - PRESSURE DROP - RW VALUE
Duct dimensions	Transfer diffusers comprising GRC and CLA	Total pressure drop pt, l/s				Rw = Dn,ew 1 m2	Dn,ew 10 m2
Duct dimensions	Transfer diffusers comprising GRC and CLA	5 Pa	10 Pa	15 Pa	20 Pa	dB
100	2x GRC 100 + 1x CLA-A 100-500	12	15	18	20	36	46
100	2x GRC 100 + 1x CLA-A 100-1000	12	15	18	20	47	57
100	2x GRC 100 + 1x CLA-A 100-1000 + 1x CLA-A 100-500	11	14	17	19	65	75
125	2x GRC 125 + 1x CLA-A 125-500	19	24	29	35	32	42
125	2x GRC 125 + 1x CLA-A 125-1000	19	24	29	35	45	55
125	2x GRC 125 + 1x CLA-A 125-1000 + 1x CLA-A 125-500	17	22	27	32	55	65
125	2x GRC 125 + 2x CLA-A 125-1000	17	22	27	32	62	72
160	2x GRC 160 + 1x CLA-A 160-500	31	40	49	58	27	37
160	2x GRC 160 + 1x CLA-A 160-1000	31	40	49	58	39	49
160	2x GRC 160 + 2x CLA-A 160-500	25	35	45	55	41	51
160	2x GRC 160 + 1x CLA-A 160-1000 + 1x CLA-A 160-500	25	35	45	55	50	60
160	2x GRC 160 + 2x CLA-A 160-1000	25	35	45	55	55	65
200	2x GRC 200 + 1x CLA-A 200-1000	54	70	85	100	34	44
200	2x GRC 200 + 1x CLA-A 200-1000 + 1x CLA-A 200-500	48	65	80	95	45	55
200	2x GRC 200 + 2x CLA-A 200-1000	48	65	80	95	52	62
200	2x GRC 200 + 1x CLA-A 200-1000 + 2x CLA-A 200-500	45	60	75	90	55	65
200	2x GRC 200 + 2x CLA-A 200-1000 + 1x CLA-A 200-500	45	60	75	90	61	71
250	2x GRC 250 + 1x CLA-A 250-1000	85	115	140	165	27	37
250	2x GRC 250 + 1st CLA-A 250-1000 + 1x CLA-A 250-500	80	110	133	155	36	46
250	2x GRC 250 + 2x CLA-A 250-1000	80	110	133	155	43	53
250	2x GRC 250 + 2x CLA-A 250-1000 + 1x CLA-A 250-500	75	105	125	145	51	61
250	2x GRC 250 + 3x CLA-A 250-1000	75	105	125	145	57	67
315	2x GRC 315 + 1x CLA-A 315-1000	140	180	220	260	21	31
315	2x GRC 315 + 2x CLA-A 315-1000	125	175	210	245	37	47

	Transfer diffusers comprising GRC, CLA and ALS
125	2x GRC 160+ALSd 125-160 + 1x CLA-A 125-1000	14	18	22	25	46	56
160	2x GRC 200+ALSd 160-200 + 1x CLA-A 160-1000	23	30	37	45	40	50

	Transfer diffusers comprising GRC, CLA and SOTTO
125	GRC 125 + 1x CLA-A 125-1000 + SOTTO 125	15	25	31	36	56	66
160	GRC 160 + 1x CLA-A 160-1000 + SOTTO 160	18	30	36	42	51	61
All the values in the table are calculated theoretically based on the relevant measured component.