DSA / DSA-PR / DSA-HV diffusers 4 DSA-HV Selection tables 10 DSA-HV Selection graphs 11 DSA-PR Selection tables 12 DSA-PR Selection graphs 13

Description Circular diffuser with swirl air supply, suitable for false floor installation. Diffuser slots are designed to ensure a swirl air supply with high levels of induction, achieving reduced air velocities and a moderate temperature gradient in the occupied zone. The diffuser may be used in rooms with a variable or constant air volume. Product characteristics - Floor circular diffuser, and frontal punched plate made in steel sheet of 6 mm thick. (DSA) - Floor circular diffuser, with swirl function, and frontal perforated plate made in steel sheet of 6 mm thick. (DSA-PR) - Sheet steel dirt...

Floor SeriesModels and dimensions DSA Size - Dimensions for models DSA, DSA-PR

Technical data in regard to sound power and pressure drop refer to a DSA diffuser without plenum. Technical data for the DSA plenum box diffuser can be obtained by adding 4 dB(A) to the sound power level data in the table for the diffuser without a plenum box and increasing the pressure loss by 18%. The remaining data remains unchanged. Air flow rate Effective supply area Temperature AT Vertical throw for an air velocity of 0,25 m/s Effective supply velocity Pressure drop Sound power

% (Dirt trap opening percentage) Graph 1 % (Dirt trap opening percentage) Graph 2

Floor Series Selection graphs. DSA diffuser Graphs showing the duct air velocity at different heights account for a possible difference between supply air temperature and room temperature of - 6 K; for a different differential, we must apply the coefficients shown in the table below, using the corresponding formula. Graph 3 Coefficient correction table -4 ∆T (K) 1,15 C

Floor Series Selection graphs. DSA diffuser Temperature quotient Induction rate

Floor SeriesSelection table. DSA-HV diffuser Technical data in regard to sound power and pressure drop refer to a DSA-HV diffuser without plenum. Technical data for the DSA-HV plenum box diffuser can be obtained by adding 4 dB(A) to the sound power level data in the table for the diffuser without a plenum box and increasing the pressure loss by 18%. The remaining data remains unchanged. Air flow rate Effective supply area Temperature AT Vertical throw for an air velocity of 0,25 m/s Effective supply velocity Pressure drop Sound power

Floor SeriesSelection graphs. DSA-HV diffuser Graphs showing the duct air velocity at different heights account for a possible difference between supply air temperature and room temperature of - 6 K; for a different differential, we must apply the coefficients shown in the table below, using the corresponding formula. Graphs of Temperature quotient and induction rate are similar to DSA model detailed in page 9. Sound power DSA-HV 200 WITHOUT PLENUM % (Dirt trap opening percentage) Graph 7

Floor SeriesSelection table. DSA-PR diffuser Technical data in regard to sound power and pressure drop refer to a DSA-PR diffuser without plenum. Technical data for the DSA-PR plenum box diffuser can be obtained by adding 4 dB(A) to the sound power level data in the table for the diffuser without a plenum box and increasing the pressure loss by 18%. The remaining data remains unchanged. Air flow rate Effective supply area Temperature AT Vertical throw for an air velocity of 0,25 m/s Effective supply velocity Pressure drop

Floor SeriesSelection graphs. DSA-PR diffuserSound power DSA-PR 150 WITHOUT PLENUM % (Dirt trap opening percentage) Graph 9 Sound power DSA-PR 200 WITHOUT PLENUM % (Dirt trap opening percentage) Graph 10

Floor SeriesSelection graphs. DSA-PR diffuser Graphs showing the duct air velocity at different heights account for a possible difference between supply air temperature and room temperature of - 6 K; for a different differential, we must apply the coefficients shown in the table below, using the corresponding formula.

Floor Series Selection graphs. DSA-PR diffuser Temperature quotient Induction rate

Floor SeriesSelection example. DSA diffuser In selecting the element for this type of diffusion, i.e. floor-level diffusion with temperature jumps no greater than ±6 °C, it is recommended not to exceed effective air velocity (VK) of 1.5 - 2 m/s to avoid generating irritating air currents in the occupied area (>0,25 m/s). This is particularly relevant when using this type of diffuser under seats in locations such as auditoriums. Shown below is an example giving a graph-based explanation of the selection method. Design data Auditorium with 410 seats. Total air supply volume in seating area: 22500...

Floor Series DF-CP-MT Step Swirl Diffuser Description The DF-CP-MT step swirl diffusers consist of a rectangular front plate incorporating 2 to 6 micro diffusers in a standard configuration. The units are manufactured from sheet steel and come with a black coating (RAL 9005) as standard. The diffuser can also be fitted with a connection plenum (front or side) in galvanised sheet steel. The diffusers have a highly appealing aesthetics and may be coated in a different colour (upon request) to adapt to the décor of the installation site. Aplications DF-CP-MT series diffusers are designed to provide...

Floor SeriesModels and dimensions. DF-CP-MT diffuser DF-CP-MT series diffusers can manufactured in sets of 2, 3, 4, 5, or 6 swirl micro-diffusers. The diffusers can also be supplied with a plenum at the customer’s request. The diffusers come in the following models:

Floor Series Models and dimensions. DF-CP-MT diffuser TOP ENTRY PLENUM SIDE ENTRY PLENUM

Floor Series Technical data. DF-CP-MT diffuser SOUNDS LEVEL SELECTION TABLE: The air flow rate and pressure drop (values in parenthesis) for each diffuser size are determined according to the desired sound level. The graph below shows the air velocity (of a micro-diffuser) measured at 100 mm from the floor according to the height of the unit. Depending on the number of elements that make up the plate, the velocity value shown in the graph is multiplied by that shown in table 2. Table 2: Correction values for 2 to 6 micro-diffusers