VWR-N (RAL9016) • Square swirl diffuser with fixed blades

Name: VWR-N (RAL9016) • Square swirl diffuser with fixed blades
Brand: Fanbase-dev
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Square swirl ceiling diffuser with fixed blades

Quantity

Brand

CAIROX

Application

For air supply in ventilation and air conditioning systems

Material

Steel

Documents

UK-EN-A04.071.1BIS.SK-VWR_N_RAL9016__7.pdf

Composition

Fixed blades

Order Example

VWR-N, 315 + RER-LB 315 + CRC 250

Explanation
VWR-N = Diffuser type
315 = Diffuser size (Ø diffuser neck connection)

Accessories
RER-LB = Plenum box
CRC = Regulating valve for plenum box
250 = Plenum box connection diameter

Symbols and Specifications

Q = Air volume in m³/h
Ak = Effective surface (free area) in m²
B = Distance between the diffusers in m
H = Installation height of the diffusers in m
Vz = Maximum velocity at the occupied zone according to distance between the diffusers and installation height in m/s
Vk = Average effective velocity through the diffuser in m/s
X0.25 = Throw length in m at an end velocity Vt of 0,25m/s
Ps = Static pressure loss given in Pa
Lw(A) = Acoustic power in dB(A)

The throw X0.25 is given at an end velocity of 0.25m/s for a smooth ceiling without any obstacles.
The values are given for isothermal supply air. Throw distances for cooling conditions at -11K can be calculated by dividing the X0.25 values with factor 1.1. For heating purposes at Dt of +11K a multiplier of 1.1 should be applied to the given X0.25 value.
In order to achieve a high comfort level, selections can be made according to the maximal velocity at the occupied zone Vz. These values are given at distances between diffusers B and installation heights H. Velocities Vz lower than, or equal to 0,25m/s at the occupied zone are advised.
The pressure losses Ps are given for diffusers without damper of with fully opened damper.
The acoustic power values Lw(A) are given for diffusers without damper of with fully opened damper without room attenuation. Acoustic powers below 20dB(A) are mentioned as "<20" in the tables.
For all special requirements, please contact our engineering office.

Dimensions

VWR-N	A [mm]	ØD1 [mm]	No. of Blades
125	171 x 171	123	8
160	213 x 213	158	10
200	264 x 264	198	12
250	326 x 325	248	14
315	404 x 404	313	16
355	448 x 448	353	17
400	500 x 500	398	18
500	596 x 596	498	20

Quick Selections

VWR-N				125			160			200			250			315			355			400			500
Q	Ak			0.0099			0.0123			0.0176			0.0226			0.033			0.0359			0.05			0.0618
	B			1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6	1.2	2.4	3.6
50		H=	2.7	0.08	0.05	0.04
	Vz	H=	3.2	0.06	0.04	0.04
		H=	3.8	0.04	0.04	0.03
	Vk			1.4
	X0.25			0.5
	Ps			11
	Lw(A)			<20
100		H=	2.7	0.15	0.11	0.08	0.14	0.1	0.08	0.11	0.08	0.06
	Vz	H=	3.2	0.11	0.09	0.07	0.1	0.08	0.06	0.09	0.07	0.05
		H=	3.8	0.09	0.07	0.06	0.08	0.06	0.05	0.07	0.05	0.05
	Vk			2.8			2.3			1.6
	X0.25			0.9			0.8			0.7
	Ps			45			19			6
	Lw(A)			35			26			<20
150		H=	2.7	0.23	0.16	0.13	0.21	0.15	0.11	0.17	0.12	0.1	0.15	0.11	0.08
	Vz	H=	3.2	0.17	0.13	0.11	0.15	0.12	0.1	0.13	0.1	0.08	0.11	0.09	0.07
		H=	3.8	0.13	0.11	0.09	0.12	0.1	0.08	0.1	0.08	0.07	0.09	0.07	0.06
	Vk			4.2			3.4			2.4			1.8
	X0.25			1.4			1.2			1			0.9
	Ps			100			41			14			5
	Lw(A)			46			38			24			<20
200		H=	2.7	0.31	0.22	0.17	0.27	0.2	0.15	0.23	0.16	0.13	0.2	0.14	0.11	0.17	0.12	0.09	0.18	0.13	0.1
	Vz	H=	3.2	0.23	0.18	0.14	0.21	0.16	0.13	0.17	0.13	0.11	0.15	0.12	0.09	0.13	0.1	0.08	0.13	0.1	0.08
		H=	3.8	0.18	0.14	0.12	0.16	0.13	0.11	0.13	0.11	0.09	0.12	0.09	0.08	0.1	0.08	0.07	0.1	0.08	0.07
	Vk			5.6			4.5			3.2			2.5			1.7			1.5
	X0.25			1.8			1.6			1.4			1.2			1			1.1
	Ps			178			72			25			9			3			2
	Lw(A)			54			46			32			22			<20			<20
300		H=	2.7							0.34	0.25	0.19	0.3	0.22	0.17	0.25	0.18	0.14	0.27	0.19	0.15	0.23	0.16	0.13
	Vz	H=	3.2							0.26	0.2	0.16	0.23	0.17	0.14	0.19	0.14	0.12	0.2	0.16	0.13	0.17	0.13	0.11
		H=	3.8							0.2	0.16	0.14	0.17	0.14	0.12	0.14	0.12	0.1	0.16	0.13	0.11	0.13	0.11	0.09
	Vk									4.7			3.7			2.5			2.3			1.7
	X0.25									2.1			1.8			1.5			1.6			1.4
	Ps									54			20			6			4			2
	Lw(A)									43			33			<20			<20			<20
400		H=	2.7										0.4	0.29	0.22	0.33	0.24	0.19	0.36	0.26	0.2	0.3	0.22	0.17	0.24	0.17	0.13
	Vz	H=	3.2										0.3	0.23	0.19	0.25	0.19	0.16	0.27	0.21	0.17	0.23	0.18	0.14	0.18	0.14	0.11
		H=	3.8										0.23	0.19	0.16	0.19	0.16	0.13	0.21	0.17	0.14	0.18	0.14	0.12	0.14	0.11	0.09
	Vk												4.9			3.4			3.1			2.2			1.8
	X0.25												2.4			2			2.2			1.8			1.4
	Ps												35			12			8			4			3
	Lw(A)												41			27			23			<20			<20
500		H=	2.7													0.42	0.3	0.23	0.45	0.32	0.25	0.38	0.27	0.21	0.29	0.21	0.16
	Vz	H=	3.2													0.31	0.24	0.2	0.34	0.26	0.21	0.29	0.22	0.18	0.22	0.17	0.14
		H=	3.8													0.24	0.2	0.16	0.26	0.21	0.18	0.22	0.18	0.15	0.17	0.14	0.12
	Vk															4.2			3.9			2.8			2.2
	X0.25															2.5			2.7			2.3			1.8
	Ps															18			13			7			4
	Lw(A)															33			30			<20			<20
600		H=	2.7													0.5	0.36	0.28	0.54	0.39	0.3	0.46	0.33	0.25	0.35	0.25	0.2
	Vz	H=	3.2													0.38	0.29	0.24	0.4	0.31	0.25	0.34	0.26	0.21	0.27	0.2	0.17
		H=	3.8													0.29	0.24	0.2	0.31	0.25	0.21	0.26	0.21	0.18	0.2	0.17	0.14
	Vk															5.1			4.6			3.3			2.7
	X0.25															3			3.2			2.7			2.1
	Ps															26			18			9			6
	Lw(A)															38			35			22			<20
800		H=	2.7																			0.61	0.44	0.34	0.47	0.34	0.26
	Vz	H=	3.2																			0.46	0.35	0.29	0.35	0.27	0.22
		H=	3.8																			0.35	0.29	0.24	0.27	0.22	0.19
	Vk																					4.4			3.6
	X0.25																					3.7			2.8
	Ps																					16			11
	Lw(A)																					30			22
1000		H=	2.7																			0.76	0.54	0.42	0.59	0.42	0.33
	Vz	H=	3.2																			0.57	0.44	0.36	0.44	0.34	0.28
		H=	3.8																			0.44	0.36	0.3	0.34	0.28	0.23
	Vk																					5.6			4.5
	X0.25																					4.6			3.5
	Ps																					26			17
	Lw(A)																					36			28
1200		H=	2.7																						0.71	0.51	0.39
	Vz	H=	3.2																						0.53	0.41	0.33
		H=	3.8																						0.41	0.33	0.28
	Vk																								5.4
	X0.25																								4.2
	Ps																								24
	Lw(A)																								33