Linear slot diffusers

S-74-18 linear slot diffusers Description 4 Selection in a sample project 7 S-74-25 high-capacity linear slot diffusers Description 8 Selection in a sample project 11 S-72-25FF linear slot diff. with filter holder Selection table 12 General dimensions Linear slot diffuser models 16 S-72-21/18 linear slot diffuser General dimensions 23

ACTIVE LENGHT OPENING = NOMINAL OVERALL DIMENSION S-74-18 Linear slot diff., 18 mm, with regulation. Linear slot diff., 18 mm, without regulation. Series 70.1 Description S-74-18 linear slot diffuser for supply air. Aluminium construction with standard natural anodized or standard glossy RAL-9010 white pre-lacquered finish. Black deflections vanes with a matte finish. The S-74-18-P model includes a inlet plenum made of galvanized steel sheet, with or without insulation. Three attachment systems are available for the plenum: screws, bridges or clips. The systems are described on pages 14 and 15....

SYMBOLS Q Air flow in m3/h Vk Effective supply velocity in m/s Pt Total pressure drop, in Pa dB(A) Sound power level in dB(A) This selection table is based on laboratory tests as per ISO 5219 (UNE 100.710) and ISO 5135 and 3741. The AT is equal to -10°C, the temperature difference between the room and the supply air.

SYMBOLS Q Air flow in m3/h Vk Effective supply velocity in m/s Pt Total pressure drop, in Pa dB(A) Sound power level in dB(A) NOTES ON SELECTION TABLES For the selection tables with lateral discharge: - The diffuser is positioned along the longitudinal axis of the ceiling, next to the wall, in a room of the following size: L = Length, A = Width and I = Length of the diffuser. (A - I) / L = 0,5 - The air jet is adherent (Coanda effect), i.e., the diffuser is mounted flush with the ceiling. For the selection tables with vertical discharge: - The diffuser is positioned in the middle of...

Selection table for S-74-18 (lateral discharge) Example Correction factor for width-to-length ratio of the room: Air flor _______________________________ 200 m3/h Throw _______________________________ 2 to 2,5 m Sound power level _________________ Below 30 dB(A) Required pressure loss _______________ Below 15 Pa Effective velocity __________________________ 2 m/s Direction of air flor ________________________ Lateral This factor is known as Ca.To calculate, divide the diffuser width less length by the length of the room. This is applicable to linear slot diffusers with lateral discharge. In diffusers...

S-74-25 high-capacity linear slot diffusers Description S-74-25 high-capacity linear slot diffuser for supply air. Aluminium construction in standard natural anodized or standard glossy RAL-9010 white preenamelled finish. Black deflection vanes with a matte finish. The S-74-25-P.. model includes a inlet plenum made of galvanized steel sheet, with or without insulation. S-74-25 Three attachment systems are available for the plenum: screws, bridges or clips. The systems and coding are described on pages 14 to 15. Application S-74-25 linear slot diffusers are specially recommended for ceiling installation...

SYMBOLS Q Air flow in m3/h Vk Effective supply velocity in m/s Pt Total pressure drop, in Pa dB(A) Sound power level in dB(A) This selection table is based on laboratory tests as per ISO 5219 (UNE 100.710) and ISO 5135 and 3741. The AT is equal to -10 °C, the temperature difference between the room and the supply air. The maximum velocity is 0,25 m/s in the occupied zone.

Series 70.1Selection table for S-74-25, high-capacity (vertical discharge) NOTES ON SELECTION TABLES For the selection tables with lateral discharge: - The diffuser is located along the longitudinal axis of the ceiling, next to the wall, in a room of the following size: L = Length, A = Width and I = Length of the diffuser. (A - I) / L = 0,5 - The air jet is adherent (Coanda effect), i.e., the diffuser is mounted flush with the ceiling. For the selection tables with vertical discharge: - The diffuser is located in the middle of the ceiling in a square room. - Positioning for vertical discharge,...

Selection example S-74-25, high-capacity (lateral discharge) Example Requirements: Air flow ______________________________ 600 m3/h Throw ____________________________________ 4 m Sound power level _________________ Below 40 dB(A) Required pressure loss _______________ Below 15 Pa Effective velocity _____________________ 2,5 to 3 m/s Direction of air flow _______________________ Lateral Selection: Based on the selection table (page 9) for linear slot diffusers with lateral discharge and on the general criteria that, for HVAC facilities: S-74-25 diffuser, four-slots, length 1600 mm. 3 Q (Air flow)...

Series 70.1Selection table for S-72-25FF, for return (filter holder) Leng NOTE: The pressure drop (Pa) includes a Class G-2 filter. This selection table is based on laboratory tests according to ISO 5219 (UNE 100.710), ISO 5135 and ISO 3741 standards.

Induction rate Induction effect The induced air flow in the room can be determined using the factor (qx/qo) with the parameters Xc in m (corrected throw) for lateral discharge diffusers, Y (throw in m) for vertical discharge diffusers, and the effective area in m2 (Ak). S-74-25 INDUCTION air flow in horizontal discharge INDUCTION air flow in horizontal discharge 2 S-74-25 INDUCTION air flow in vertical discharge INDUCTION air flow in vertical discharge

Series 70.1 S-70-1 linear slot diffuser modelsTypes of linear slot diffusers This page presents a schematic description of the linear slot diffusers, including an overview of the different versions and plenum attachment systems, as well as the filter holder model. Diffusers screwed to plenum Diffusers with mounting bridge Diffusers with mounting clips

Types of plenums (PF, PD, PC) These three types of plenum are adaptable to all linear slot diffusers of the 70 SERIES, for both supply and return air. All models have hanging tabs, that are folded for easier transport. PF or PFA plenum The plenums are factory-mounted on the diffuser with screws (1). PD or PDA plenum This model is equipped with a removable plenum, which is attached to the diffuser by bridges (2). Access to mounting bridges Use a screwdriver inserted in the holes in the deflection vanes, usually hidden with plastic caps. PC or PCA plenum The plenum is mounted on the diffuser with...