Slot diffusers. Slot diffusers LD-17, LD-18

LD-17, LD-18 Application LD-17 and LD-18 are designed for supply of cold or warm air in rooms with a height between. m and 4 m. They allow easy setting of air deflectors for different modes of operation and can be mounted to ceiling or wall. Description LD-17 and LD-18 slot diffusers are designed in 1,, and 4-slot versions. The unit s front consists of anodised aluminium profiles (on customer s request, these can be powder painted in RAL 90 or another colour). The individually adjustable air deflectors are made of plastic in white (RAL 90) or black (RAL 900) colour). Plenum box is made of galvanised sheet steel. LD-17 and LD-18 are made in standard lengths: from 00 up to 000 mm with a mm step (any length available upon request). Nominal air volume per 1 m of slot: LD-17 m³/h LD-18 00 m³/h (Δp t = 0 Pa, NR = db) 1. Plenum box. Inlet spigot. 4. Side section. Cylindrical deflector 6. Intermediate section 7. Connecting bar 8. Insulation (entire outside surface of the plenum box) 8 1 B 60 ØD H H H1 4 A F 6 7 4 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES LD-17 b=1 4 b 18 E EXTERNAL ELEMENTS No. of slots A F E B H H1 H 1 4. 4. 6 7 0 6 0. 78. 67. 98 19 0 7 1. 111.. 11 17 0 9. 4 144. 1. 164 0 90 7. AIR FLOW CONTROL UNITS LD-18 b=6. No. of slots A F E B H H1 H 1 7.0 46.0 76. 118 76 16. 1.0 90. 11.0 16 96 6. 146.0 1.0 16. 07 9 6 76. 4 190. 179..0 1 18 61 01. SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 199

90 Number and diameter of inlet spigots Number of slots L 00 to 0 1 to 1600 to 000 Number and diameter of inlet spigots LD-17 LD-18 LD-17 LD-18 LD-17 LD-18 1 1x98 1x1 x98 x1 x1 x18 1x18 1x18 x1 x18 x18 x18 1x18 1x198 x18 x18 x18 x198 4 1x198 1x x18 x198 x198 x Position of inlet spigots J L/ L/ J Number of spigots Standard length Position of inlet spigots 1 00-0 L/ 1- J=00 1600-000 J=0 Slot diffuser face plate designs 00 Slot diffuser face plates are made of linear or angular ended sections, which allow the diffusers to be joined at different angles. 00 Joining diffusers together in length Joining in length requires connecting plates (the total length of combined diffusers is not limited). End seals End seals are components of the diffuser face plate. They are available in two designs: as an angle piece (E on both ends, ET on one end only) or plates (F on both ends, FT on one end only). The connecting strip-section has no end anglepieces or plates seals (designation T). 00

Fixing of the plenum box onto LD-17, LD-18 diffusers Installation methods Fixing with self-tapping screws (U) Fixing with spring clamps (S) Fixing with a cross-member (Z) Installation with hangers (P) Installation with a cross member without plenum box (N) Types of air discharges SUPPLY AIR NOZZLES SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS Vertical heating Horizontal cooling EXTERNAL ELEMENTS Different settings of the two slot model (similar combinations are possible also for diffusers with more slots). AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 01

Ordering key LD-17/1/B/E/K/M/S/P I L=0 (length L=00, 00,, 000) I Thermal insulation (polyethylene), mm thick, on the outside of the plenum box I9 Sound and thermal insulation (from - C to C), 9 mm thick, on the outside of the plenum box (synthetic rubber based material) I19 Sound and thermal insulation (from - C to C), 19 mm thick, on the outside of the plenum box (synthetic rubber based material) N Diffuser installation with a cross-member without plenum box P Installation of the plenum box with hangers Z Fixing of the diffuser to the plenum box with a cross-member S Fixing of the diffuser to the plenum box with spring clamps U Fixing of the diffuser to the plenum box with self-tapping screws M K Plenum box E End sealing on both ends ET End sealing on one end F End plate on both ends FT End plate on one end T Rail-type without end sealings and plates B Black deflectors W White deflectors 1 Number of slots 4 LD-17 Slot diffuser type LD-18 Note: Please specify the deflector colour in your order. Standard eloxal colour of the aluminium section is the original aluminium colour. Other colours shall be specified in the order. When installing in cooling ceilings, consult the manufacturer. Versions with insulation on the inside of the plenum box are also available. Quick selection diagram: L WA < db(a) 4 LD-17 LD-18 število Nr. of rež slots 1 00 00 0 Q (m /hm) 0

Sound power level, pressure drop and throw distances LD-17 horizontal discharge Type Q [l/s] 1.9 7.8 41.7.6 8. 111.1 18.9 166.7 194.4. 0.0 77.8. [m³/h) 0 00 00 0 00 600 700 800 900 0 L WA [db (A)] 47 LD-17/1 L=00 mm Δp t [Pa] 1 4 L 0. [m].6 6.6 L min [m] 1. >1 L WA [db (A)] 7 4 0 LD-17/1 L=0 mm Δp t [Pa] 8 7 6 9 L 0. [m] 6 6. 6.7 6.8 L min [m] 1 >1 >1 >1 L WA [db (A)] < 9 4 0 LD-17/1 L= mm Δp t [Pa] 16 99 L 0. [m]. 6.1 6. 6.6 6.8 L min [m] 4 1. >1 >1 >1 L WA [db (A)] < 6 4 49 LD-17/1 L=000 mm Δp t [Pa] 6 11 19 L 0. [m].8 6.1 6. 6.7 6.8 L min [m] 6. 1. 1 >1 >1 L WA [db (A)] < 4 4 0 LD-17/ L=00 mm Δp t [Pa] 11 6 L 0. [m].4.7.8 L min [m] 11. 14 >1 >1 L WA [db (A)] 7 0 6 4 0 LD-17/ L=0 mm Δp t [Pa] 7 14 48 80 L 0. [m]..4..7.8 L min [m] 8 1. 1.4 >1 >1 L WA [db (A)] 6 0 6 4 46 LD-17/ L= mm Δp t [Pa] 8 1 8 44 6 84 L 0. [m].1.4..6.8.8 L min [m].7 1. 1. >1 >1 >1 L WA [db (A)] 6 6 41 44 48 1 LD-17/ L=000 mm Δp t [Pa] 4 7 1 18 L 0. [m]..4..6.7.7.8 L min [m] 7. 1. 1.4 >1 >1 >1 >1 L WA [db (A)] 0 7 4 4 LD-17/ L=00 mm Δp t [Pa] 1 0 0 L 0. [m] 8 8. 8.7 9 L min [m] 9. 11. 1. L WA [db (A)] < 9 4 4 0 LD-17/ L=0 mm Δp t [Pa] 8 14 4 L 0. [m] 7.7 7.9 8 8. 8.8 L min [m] 6.4 6.9 9 11 1 L WA [db (A)] 8 4 48 LD-17/ L= mm Δp t [Pa] 8 19 4 79 L 0. [m] 7.8 8. 8. 8.7 8.7 L min [m] 7. 9..8 11.7 1. L WA [db (A)] 1 6 41 46 0 4 LD-17/ L=000 mm Δp t [Pa] 4 6 8 1 17 L 0. [m] 7.9 8.1 8.4 8. 8.6 9 L min [m] 7.7 9.6. 11 11.9 1 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 0

Type LD-17/4 L=00 mm LD-17/4 L=0 mm LD-17/4 L= mm LD-17/4 L=000 mm Q [l/s] 1.9 7.8 41.7.6 8. 111.1 18.9 166.7 194.4. 0.0 77.8. [m³/h) 0 00 00 0 00 600 700 800 900 0 L WA [db (A)] 1 Δp t [Pa] 7 1 9 0 L 0. [m] 7. 7. 7.6 8 8.1 L min [m] 8. 9 9.. 11. L WA [db (A)] 8 46 60 Δp t [Pa] 9 1 8 6 90 L 0. [m] 7. 7.6 7.7 7.9 8 L min [m] 8. 9 9... L WA [db (A)] 8 44 48 60 Δp t [Pa] 19 0 44 60 80 L 0. [m] 7. 7. 7.6 7.8 7.9 8 L min [m] 7. 8.7 9. 9.8..4 L WA [db (A)] 4 8 4 4 49 6 60 Δp t [Pa] 7 9 1 17 L 0. [m] 7.4 7. 7.6 7.8 7.8 7.8 7.9 8. L min [m] 8. 8.6 9. 9. 9.7.. 11. Definition of symbols Conditions for L min : L WA Dp t L 0. L min A-weighted sound power level Total pressure drop calculated to normal conditions Isothermal throw distance of supply air jet, when its velocity drops down to 0. m/s Minimum distance between diffusers, that the jet velocity is less than or equal to 0. m/s Q=600 m³/h L=0 mm Room height: H=.8 m Occupied zone height: 1.8 m Room temperature: 4 C Supply temperature: DT= -6 K Sound power level, pressure drop and throw distances LD-17 vertical discharge Type LD-17/1 L=00 mm LD-17/1 L=0 mm LD-17/1 L= mm LD-17/1 L=000 mm LD-17/ L=00 mm LD-17/ L=0 mm Q [l/s] 1.9 7.8 41.7.6 8. 111.1 18.9 166.7 194.4. 0.0 77.8. [m³/h) 0 00 00 0 00 600 700 800 900 0 L WA [db (A)] 47 Δp t [Pa] 17 68 L 0. (+K) [m].4 4.8 L WA [db (A)] 7 4 0 Δp t [Pa] 4 17 9 68 L 0. (+K) [m] 1.4. L WA [db (A)] < 9 4 0 Δp t [Pa] 8 17 0 68 L 0. (+K) [m] 0.9 1... 4.7 L WA [db (A)] < 6 4 49 Δp t [Pa] 4 17 9 68 L 0. (+K) [m] 0.8 1.8.4.8 4.8 L WA [db (A)] 4 1 Δp t [Pa] 4 17 9 68 L 0. (+K) [m] 1.6 4 4. L WA [db (A)] 8 1 7 46 1 Δp t [Pa] 4 17 9 68 L 0. (+K) [m] 1.6.6 4. 4. 04

Type LD-17/ L= mm LD-17/ L=000 mm LD-17/ L=00 mm LD-17/ L=0 mm LD-17/ L= mm LD-17/ L=000 mm LD-17/4 L=00 mm LD-17/4 L=0 mm LD-17/4 L= mm LD-17/4 L=000 mm Definition of symbols L WA Dp t L 0. (+ C) Q [l/s] 1.9 7.8 41.7.6 8. 111.1 18.9 166.7 194.4. 0.0 77.8. [m³/h) 0 00 00 0 00 600 700 800 900 0 L WA [db (A)] 6 0 6 4 46 Δp t [Pa] 4 8 17 0 48 68 L 0. (+K) [m] 1.6...6 4 4. L WA [db (A)] 6 6 41 44 48 1 Δp t [Pa] 4 17 7 9 68 L 0. (+K) [m] 1.8..1..8 4. 4. L WA [db (A)] 1 8 46 Δp t [Pa] 8 17 0 68 L 0. (+K) [m].1 4.. 7. L WA [db (A)] 1 6 44 Δp t [Pa] 4 8 17 0 L 0. (+K) [m] 1.9.1 4.. L WA [db (A)] 0 7 44 0 Δp t [Pa] 8 14 1 0 L 0. (+K) [m] 1..9.8 4.8. L WA [db (A)] 7 4 47 1 Δp t [Pa] 4 8 1 17 0 L 0. (+K) [m] 1.9.1.8 4.. L WA [db (A)] 7 4 4 7 Δp t [Pa] 4 17 9 68 L 0. (+K) [m].1 4.. 6.8 7.7 L WA [db (A)] 6 9 47 4 61 Δp t [Pa] 4 17 7 9 L 0. (+K) [m] 4.4. 6.1 6.7 L WA [db (A)] 9 4 49 61 Δp t [Pa] 4 8 1 17 0 L 0. (+K) [m].9 4.1 4.8..8 6. L WA [db (A)] 9 4 46 0 7 61 Δp t [Pa] 4 7 1 17 7 9 L 0. (+K) [m].1 4 4. 4.8..8 6.1 6.8 A-weighted sound power level Total pressure drop calculated to normal conditions Isothermal throw distance of supply air jet with temperature +K, when its velocity drops down to 0. m/s SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES EXTERNAL ELEMENTS AIR FLOW CONTROL UNITS 0

Sound power level, pressure drop and throw distances LD-18 horizontal discharge Type LD-18/1 L=00 mm LD-18/1 L=0 mm LD-18/1 L= mm LD-18/1 L=000 mm LD-18/ L=00 mm LD-18/ L=0 mm LD-18/ L= mm LD-18/ L=000 mm LD-18/ L=00 mm LD-18/ L=0 mm LD-18/ L= mm LD-18/ L=000 mm Q [l/s] 7.8 41.7.6 8. 111.1 18.9 166.7 194.4. 0.0 77.8. 88.9 [m³/h) 00 00 0 00 600 700 800 900 0 L WA [db (A)] 41 1 Δp t [Pa] 4 L 0. [m] 6.6 6.9 L min [m] >1 >1 L WA [db (A)] 9 7 44 Δp t [Pa] 16 6 64 L 0. [m] 6. 6. 6.7 L min [m] 1.8 >1 >1 L WA [db (A)] 1 6 46 Δp t [Pa] 9 19 4 77 L 0. [m].8 6. 6.4 6.6 L min [m] 4. 1.8 >1 >1 L WA [db (A)] < 8 47 8 6 Δp t [Pa] 1 4 9 1 4 47 L 0. [m]..9 6. 6. 6.7 6.8 6.9 6.9 L min [m] 6.6 1.8 >1 >1 >1 >1 >1 L WA [db (A)] 9 7 4 6 Δp t [Pa] 6 1 4 L 0. [m].4.6.7.8 L min [m] 14 >1 >1 >1 L WA [db (A)] < 7 48 Δp t [Pa] 4 9 16 7 6 L 0. [m]...6.7 L min [m] 8 1.4 >1 >1 L WA [db (A)] < 7 4 4 0 Δp t [Pa] 9 0 80 L 0. [m]..4.6.7.7 L min [m].8 1.4 >1 >1 >1 L WA [db (A)] 0 9 44 47 1 4 7 6 67 Δp t [Pa] 1 6 9 1 18 9 6 71 L 0. [m]..4..6.7.7.7.8.8.8 L min [m] 8 1.4 >1 >1 >1 >1 >1 >1 >1 >1 L WA [db (A)] < 1 7 48 6 6 Δp t [Pa] 6 11 4 4 66 L 0. [m] 8 8. 8.6 8.8 9 9.1 L min [m] 8 11. 1.6 1.4 1.8 L WA [db (A)] < 7 4 46 1 Δp t [Pa] 4 7 16 9 4 6 88 L 0. [m] 7.7 8 8. 8.6 8.7 8.8 8.9 L min [m] 6.4 8 11. 1 1.6 1 L WA [db (A)] < 9 4 8 4 46 0 6 Δp t [Pa] 4 9 1 4 4 47 61 77 96 L 0. [m] 7.6 8 8. 8.4 8.6 8.7 8.7 8.8 8.9 L min [m].8 8. 9.6.6 11. 11.8 1. 1.6 1.8 L WA [db (A)] 6 0 4 7 44 46 49 4 8 Δp t [Pa] 1 4 6 8 1 17 L 0. [m] 7.7 8 8. 8.4 8. 8.6 8.6 8.7 8.8 8.9 L min [m] 6.4 8 9..8 11. 11.8 1 1.6 1 06

Type LD-18/4 L=00 mm LD-18/4 L=0 mm LD-18/4 L= mm LD-18/4 L=000 mm Q [l/s] 7.8 41.7.6 8. 111.1 18.9 166.7 194.4. 0.0 77.8. 88.9 [m³/h) 00 00 0 00 600 700 800 900 0 L WA [db (A)] 8 4 44 8 64 68 Δp t [Pa] 6 1 4 7 7 L 0. [m] 7.4 7.6 7.8 8 8.1 8. 8. L min [m] 8. 9..6 11 11. 11.4 L WA [db (A)] < 1 7 4 47 1 8 Δp t [Pa] 4 9 16 6 7 0 6 8 L 0. [m] 7 7.4 7.6 7.7 7.8 7.9 8 8 L min [m] 6. 8. 9 9.6..4.6.8 L WA [db (A)] 6 1 8 4 4 48 1 6 Δp t [Pa] 9 14 0 8 6 46 7 8 L 0. [m] 7 7. 7.4 7.6 7.7 7.8 7.8 7.9 8 L min [m] 6. 7.6 8.4 9 9.6 9.8.4.6 L WA [db (A)] 8 1 4 7 4 4 0 4 Δp t [Pa] 4 6 7 9 11 16 L 0. [m] 7 7. 7.4 7. 7.6 7.7 7.7 7.8 7.9 L min [m] 6. 7.4 8. 8.6 9. 9.4 9.8..4 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS SLOT DIFFUSERS, ROUND DUCT DIFFUSERS Definition of symbols L WA Dp t L 0. L min A-weighted sound power level Total pressure drop calculated to normal conditions Isothermal throw distance of supply air jet, when its velocity drops down to 0. m/s Minimum distance between diffusers, that the jet velocity is less than or equal to 0. m/s Conditions for L min : Q=600 m³/h L=0 mm Room height: H=.8 m Occupied zone height: 1.8 m Room temperature: 4 C Supply temperature: DT= -6 K SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES AIR FLOW CONTROL UNITS EXTERNAL ELEMENTS 07

Sound power level, pressure drop and throw distances LD-18 vertical discharge Type LD-18/1 L=00 mm LD-18/1 L=0 mm LD-18/1 L= mm LD-18/1 L=000 mm LD-18/ L=00 mm LD-18/ L=0 mm LD-18/ L= mm LD-18/ L=000 mm LD-18/ L=00 mm LD-18/ L=0 mm LD-18/ L= mm LD-18/ L=000 mm LD-18/4 L=00 mm Q [l/s] 7.8 41.7.6 8. 111.1 18.9 166.7 194.4. 0.0 77.8. 88.9 [m³/h) 00 00 0 00 600 700 800 900 0 L WA [db (A)] 1 Δp t [Pa] 6 L 0. (+K) [m].4.1 L WA [db (A)] 9 6 4 Δp t [Pa] 17 9 69 L 0. (+K) [m] 1...4 L WA [db (A)] 1 6 4 Δp t [Pa] 1 8 86 L 0. (+K) [m] 0.7 1... L WA [db (A)] 8 9 46 7 Δp t [Pa] 4 7 17 0 47 67 L 0. (+K) [m] 0.9.. 4.4. L WA [db (A)] 9 7 44 Δp t [Pa] 6 14 6 L 0. (+K) [m].4..8 4.6 L WA [db (A)] < 7 47 Δp t [Pa] 4 17 9 69 L 0. (+K) [m] 1 1.9.4..8 L WA [db (A)] < 7 9 44 49 Δp t [Pa] 6 9 61 88 L 0. (+K) [m] 1.1 1.7.4.4.8 L WA [db (A)] 0 9 4 47 0 6 61 Δp t [Pa] 9 1 1 9 8 48 9 8 L 0. (+K) [m] 1 1.9.4.9...8 4 4. 4.6 L WA [db (A)] 0 6 46 4 60 Δp t [Pa] 6 11 44 69 L 0. (+K) [m] 1.9.1 4.7 7.1 8. L WA [db (A)] < 6 9 44 49 Δp t [Pa] 4 8 17 1 49 70 9 L 0. (+K) [m] 1. 1.9.1 4.8 6. L WA [db (A)] 8 7 41 4 48 1 Δp t [Pa] 18 8 41 6 7 9 L 0. (+K) [m] 1 1.9.7.4 4 4.7..8 L WA [db (A)] 6 9 6 9 4 4 47 6 Δp t [Pa] 8 1 16 1 7 4 48 66 L 0. (+K) [m] 1. 1.9..1.6 4 4..8 6. L WA [db (A)] 1 7 4 0 6 61 Δp t [Pa] 6 14 9 6 L 0. (+K) [m].1. 4.1.4 6.4 7. 7.9 Definition of symbols L WA A-weighted sound power level Dp t Total pressure drop calculated to normal conditions L 0. (+ C) Isothermal throw distance of supply air jet with temperature +K, when its velocity drops down to 0. m/s 08

Type LD-18/4 L=0 mm LD-18/4 L= mm LD-18/4 L=000 mm Q [l/s] 7.8 41.7.6 8. 111.1 18.9 166.7 194.4. 0.0 77.8. 88.9 [m³/h) 00 00 0 00 600 700 800 900 0 L WA [db (A)] < 0 6 41 4 49 6 Δp t [Pa] 4 18 7 9 4 70 89 L 0. (+K) [m].1. 4.1 4.8.4 6 6. 6.9 L WA [db (A)] 6 0 4 7 41 44 47 0 4 Δp t [Pa] 6 16 41 6 9 L 0. (+K) [m].1.9.6 4.1 4.6..8 6. L WA [db (A)] 7 0 6 9 41 44 48 Δp t [Pa] 7 1 16 0 9 9 L 0. (+K) [m].1.8..8 4. 4. 4.8. 6 VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS Pressure drop (valid for horizontal discharge and plenum box with % opened volume control ) LD-17/1 LD-17/ 00 L=00 mm 0 00 L=00 mm 0 SLOT DIFFUSERS, ROUND DUCT DIFFUSERS p t (Pa) 0 0 0 0 L WA (db(a)) 4 0 000 0 00 00 00 700 0 00 00 00 700 900 (Pa) p t 0 0 0 0 L WA (db(a)) 4 0 000 AIR DISPLACEMENT UNITS SUPPLY AIR NOZZLES LD-17/ 00 0 0 L=00 mm 0 LD-17/4 00 0 0 L=00 mm 0 EXTERNAL ELEMENTS (Pa) p t 0 0 L WA (db(a)) 4 0 000 00 00 00 700 900 (Pa) p t 0 0 L WA (db(a)) 4 0 00 00 00 700 900 000 AIR FLOW CONTROL UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES 09

Correction factors LD-17/1 Type of discharge Horizontal Vertical L=00 L=0 L= L=000 p t x 1 x 1.1 x 1.1 x 1. L WA - + 1 - + p t x 1 x 1. x 1. x 1. L WA - + - + 1 p t x 1 x 1. x 1. x 1.6 L WA - + - +1 p t x 1 x.9 x.0 x.7 L WA - + - - LD-17/ Type of discharge Horizontal Vertical L=00 L=0 L= L=000 p t x 1 x x 1.0 x. L WA - + 4 + 1 + p t x 1 x. x 1. x. L WA - + 4 + 1 + p t x 1 x. x 1. x. L WA - + - + 1 p t x 1 x x 1.6 x.4 L WA - + - + 1 LD-17/ Type of discharge Horizontal Vertical L=00 L=0 L= L=000 p t x 1 x. x 1.1 x.4 L WA - + + 1 + 4 p t x 1 x.6 x 1. x. L WA - + 6 + + 4 p t x 1 x.7 x 1. x.8 L WA - + 6 + + p t x 1 x. x. x 6 L WA - + + 1 + LD-17/4 Type of discharge Horizontal Vertical L=00 L=0 L= L=000 p t x 1 x. x 1. x.4 L WA - + 6 + + p t x 1 x.4 x 1. x.4 L WA - + + 1 + p t x 1 x.7 x 1. x.7 L WA - + 6 + 1 + p t x 1 x x 1.9 x 4. L WA - + 6 + 1 +

Pressure drop (valid for horizontal discharge and plenum box with % opened volume control ) (Pa) p t LD-18/1 00 0 0 0 0 L=00 mm 0 4 L ( ( ) ) 0 000 (Pa) p t LD-18/ 00 0 0 0 0 L=00 mm 0 000 0 4 L ( ( ) ) VENTILATING GRILLES, VENTILATING VALVES CIRCULAR DIFFUSERS, SQUARE DIFFUSERS SWIRL DIFFUSERS, VARIABLE SWIRL DIFFUSERS (Pa) p t LD-18/ 00 0 0 0 00 00 00 00 0 00 700 0 L=00 mm 0 L ( ( ) ) 4 0 00 700 0 000 (Pa) pt LD-18/4 00 0 0 0 00 00 00 00 00 700 0 0 L=00 mm L ( ( ) ) 4 00 700 0 0 0 000 SLOT DIFFUSERS, ROUND DUCT DIFFUSERS AIR DISPLACEMENT UNITS SOUND ATTENUATORS, SOUND ATTENUATING LOUVRES SUPPLY AIR NOZZLES AIR FLOW CONTROL UNITS EXTERNAL ELEMENTS 11

Correction factors LD-18/1 Type of discharge Horizontal Vertical L=00 L=0 L= L=000 p t x 1 x 1 x 1 x 1.4 L WA - + 1 - - p t x 1 x 1.1 x 1.1 x 1.4 L WA - + 1 - - p t x 1 x 1. x 1.1 x 1. L WA - + 1 - - p t x 1 x.8 x 1.9 x.6 L WA - + 1 - - LD-18/ Type of discharge Horizontal Vertical L=00 L=0 L= L=000 p t x 1 x.1 x 1 x.1 L WA - + - + 1 p t x 1 x. x 1.1 x.1 L WA - + - + 1 p t x 1 x. x 1.1 x. L WA - + - + 1 p t x 1 x x 1.6 x. L WA - + - + 1 LD-18/ Type of discharge Horizontal Vertical L=00 L=0 L= L=000 p t x 1 x. x 1.0 x.4 L WA - + 6 - + p t x 1 x. x 1.1 x. L WA - + 6 - + p t x 1 x. x 1. x.7 L WA - + 6 - + p t x 1 x.1 x.8 x 6. L WA - + 6 - + LD-18/4 Type of discharge Horizontal Vertical L=00 L=0 L= L=000 p t x 1 x. x 1 x.4 L WA - + + 1 + p t x 1 x. x 1.1 x. L WA - + - + p t x 1 x.6 x 1.1 x.6 L WA - + - + p t x 1 x x 1.8 x 4. L WA - + 4 - + 1