40.2 Adjustable blades swirl diffusers

Adjustable-blade swirl diffusers Models 2 Preselection based on sound level and pressure drop 3 Selection from graphs. Example 5 DF-RO swirl diffusers Basic sizes 6 Square panels for modular false ceiling, DF-RO. Dimensions 6 Square panels for plaster false ceiling, DF-RO-E. Dimensions 6 Connection plenum, PQ, for square panels. Dimensions 6 Round panels for false ceiling, DF-RO-C. Dimensions 7 Connection plenum, PC, for round panels. Dimensions 7 Coding for purchase orders. Example 7 DF-RA swirl diffusers Basic sizes 14 Square panels for modular false ceiling,...

Adjustable-blade swirl diffusers Models Increasingly stringent requirements from the standpoint of technical features (higher supply flow rates and lower velocities in the occupant area) and aesthetics (smoother incorporation in the interior design) have generally made swirl diffusers a better choice for air diffusion. KOOLAIR has enlarged its range of adjustable-blade swirl diffusers and now provides eight sizes of its well-known DF-RO diffuser, a unit with non-radial slot pattern for an "open" or "concentrated" swirl distribution. DF-RQ diffuser The new DF-RA model retains the excellent features...

Preselection based on sound level and pressure drop The tables shown below allow quick identification of the flow rate that can be supplied by each basic diffuser size for each of the available models: • DF-RO (8 basic sizes) • DF-RA (8 basic sizes) • DF-RQ (4 basic sizes) Since all swirl diffusers manufactured by KOOLAIR can be integrated in different panel sizes, the table indicates the minimum dimensions of the panel in which each basic size can be fitted. Each table contains four columns corresponding to four sound pressure levels: 30, 35, 40 and 45 dB (A), indicating in each cell the flow...

Adjustable-blade swirl diffusers Legend B = Distance between diffuser axes, in m. Distance between diffuser axis and wall, in m. Distance between ceiling and occupied area, in m. X + hR, in m. Room height, in m. Air flow per diffuser, in m /h and in l/s. Air flow velocity in occupied area, in m/s. Pressure drop, in Pa. Sound power, in dB(A).

Selection from graphs. Example The selection graphs contained in this catalogue are similar for the various models: DF-RO, DF-RA and DF-RQ, allowing the following parameters to be obtained from the supply flow rate and diffuser layout on the ceiling: • Pressure drop and sound power level generated in plenum-diffuser assembly. • Air flow velocity in occupied area at the two most adverse points a priori: - At the midpoint between two diffusers - At the wall closest to the diffuser The methodology is explained below with an example. Initial data Diffuser model: DF-RO-24xx Unit flow rate of supply...

DF-RO swirl diffusers Basic sizes. There are eight basic slot arrays for the DF-RO, varying from 12 to 48 slots and covering a wide range of air flow rates. Since the diffusers can be integrated into different sizes and types of panel (square, rectangular, round, etc.), each basic size is coded according to the number of slots it includes. Square panels for plaster false ceiling, installation type: DF-RO-E. Dimensions and coding. Basic size

Coding for purchase orders. Example Coding provides a unique description of the model ordered by the customer. Panel for plaster ceiling: DF-RO-C Check compatibility with the basic sizes. PQ Plenum with lateral connection for DF-RO and DF-RO-E PQA Same as above, internally insulated PC Plenum with lateral connection for DF-RO-C PCA Same as above, internally insulated RE Manual damper accessible from false ceiling RL Manual damper accessible from room RM Damper equipped to allow motorization. Connection plenum, PC model for diffusers integrated in round panels. DF-RO Square panel/Modular ceiling...

Exemple: DF-RO 2460 diffuser (24 slots). Initial data ResultsQ = 650 m3/h Lwa = 38 dB(A)B = 2,7 m. Vz= 0,18 m/s H = 3,2 m. APt= 24 Pa 0,07

Example: DF-RO 3260 diffuser (32 slots). Results Lwa = 40 dB(A) Vz= 0,20 m/s APt= 30 Pa

Selection graphs for DF-RO 12 and 16 slots

Series 40.2Selection graphs for DF-RO 20 and 24 slots hR(m)

Series 40.2Selection graphs for DF-RO 32 and 36 slots DFRO-32

13 Selection graphs for DF-RO 40 and 48 slots hR(m) 1,6 1,2

Series 40.2 DF-RA swirl diffusers Basic sizes. There are eight basic slot arrays for the DF-RA, varying from 12 to 48 slots and covering a wide range of air flow rates. Since the diffusers can be integrated into different sizes and types of panel (square, rectangular, round, etc.), each basic size is coded according to the number of slots it includes. Square panels for plaster false ceiling, installation type: DF-RA-E. Dimensions and coding. Basic size

Series 40.2DF-RA swirl diffusersRound panels for false ceiling, installation model: DF-RA-C. Dimensions and coding. Coding for purchase orders. Example Coding provides a unique description of the model ordered by the customer. RE Manual damper accessible from false ceiling. RL Manual damper accessible from room. RM Damper equipped to allow motorization. Connection plenum, PC model for diffusers integrated in round panels. DF-RA Square panel/Modular ceiling DF-RA-E Square panel/Plaster ceiling DF-RA-C Round panel Standard panel finish in white (RAL 9010), other finishes available by special...

Series 40.2Selection table DF-RA (air stream between diffusers) No.Slots Example: DF-RA 2460 diffuser (24 slots). Initial data Results

Series 40.2Selection table DF-RA (air stream toward the wall) No. Slots Example: DF-RA 3662 diffuser (36 slots). APt lwa Results Lwa = 44 dB(A) Vz= 0,23 m/s APt= 41 Pa

Series 40.2Selection graphs for DF-RA 12 and 16 slots hR(m) 2 1,6 1,2 0,8

Series 40.2Selection graphs for DF-RA 20 and 24 slots

Selection graphs for DF-RA 32 and 36 slots

Series 40.2Selection graphs for DF-RA 40 and 48 slots hi< (m)

Series 40.2 DF-RQ swirl diffusers Basic sizes. There are four basic slot arrays for the DF-RQ, varying from 28 to 48 slots and covering a wide range of air flow rates. Since the diffusers can be integrated into different sizes and types of panel (square, rectangular, round, etc.), each basic size is coded according to the number of slots it includes. Square panels for plaster false ceiling, installation type: DF-RQ-E. Dimensions and coding. 28 Panel for plaster ceiling: DF-RQ-E Square panels for modular false ceiling, installation type: DF-RQ. Dimensions and coding. LjJ Note: This installation...