Swirl Diffusers Type AIRNAMIC Excellent aerodynamic characteristics as a result of innovative polymer technology

Contents · Description Description __________________________________ Innovation __________________________________ Construction · Dimensions ______________________ Installation __________________________________ Nomenclature ________________________________ Acoustic quick selection ________________________ 1 Spigot 2 Damper blade for flow rate balancing 3 Double lip seal Aerodynamic quick selection Circular diffusers ____________________________ 8 Square diffusers ____________________________ 9 Diffuser faces ________________________________10 Order details ________________________________11...

Innovation The type AIRNAMIC swirl diffusers meet the most demanding requirements in terms of technology, comfort, and design. The unique design of the air control blades, a newly developed air distribution element, and the innovative plenum box result in high volume flow rates, a low sound power level and low differential pressure. The air control blades have three-dimensionally profiled contours to create an efficient swirl. Hence, the air velocity and temperature difference in the occupied zone are very low, and the level of comfort is excellent. The production of these unusually contoured...

Construction · Dimensions Characteristics Circular and square swirl diffusers made of plastic For supply or extract air For installation into suspended ceilings Suitable for all types of ceilings Side entry spigot Damper blade for flow rate balancing, can be set in 15° intervals between 0 and 90° • Plastic parts made of flame retardant plastic, compliant with German building regulations Diffuser face • Plenum box made of galvanised sheet steel, crossbar made of galvanised steel • Diffuser face, spigot and damper blade made of ABS plastic, UL 94, flame retardant (V0) • Air distribution element...

Installation Installation of the diffuser, connection to the duct, and provision of connecting and fixing materials have to be undertaken by the customer. The diffuser must be installed and connected by trained expert personnel only. All legal regulations for site work must be complied with. The diffuser has three hanging brackets (-R) or four suspension holes (-Q) for suspending the unit from the ceiling slab using threaded rods, wires or metal hangers. Use only fixing systems which have been approved by the building inspectorate. The diffuser is connected to the ducting by means of the spigot....

Nomenclature Nomenclature Volume flow rate Minimum volume flow rate Total differential pressure Spacing between two diffusers Spacing between two rows of diffusers Distance from wall Maximum time average air velocity at the wall Maximum time average air velocity between two or four diffusers A-weighted sound pressure level A-weighted sound power level NC rating of sound power level (LWNC ≈ LWA − 5 dB) The noise levels quoted are the dB (A) rating of the sound power level LWA. A typical room correction of 5 dB/oct. results in a sound pressure level of LPA ≈ LWA − 5 dB. All sound power levels are...

Acoustic quick selection Using quick selection for sizing swirl diffusers will quickly provide optimum results. It ensures compliance with normally acceptable aerodynamic and acoustic limits. − Air velocity in the occupied zone − Differential pressure − Sound power level The volume flow rates listed in the tables for aerodynamic quick selection are based on cooling mode with a supply air differential of −12 K max. For a more detailed selection and design of type AIRNAMIC swirl diffusers refer to the Easy Product Finder design programme on our website. The AIRNAMIC-R / 400 and AIRNAMIC-Q /300...

Aerodynamic quick selection Circular diffusers Example Given data Conference hall area: height: Air velocity in the occupied zone Six circular swirl diffusers Required sound power level per diffuser: Total volume flow rate: Aerodynamic quick selection Minimum distance from wall: x = 1.0 m Distance between two diffusers: a = 1.5 m (diffusers in a single row) The air velocity at the wall remains below 0.35 m/s and in the occupied zone remains below 0.2 m/s. Data for quick selection, page 7 For each swirl diffuser: V = 485 l/s ⁄ 6 = 80 l/s (290 m³/h) Quick selection 6 AIRNAMIC-R-Z / 400L 80 l/s...

Aerodynamic quick selection Square diffusers Maximum volume flow rate for a given distance a or x Nominal size Between four diffusers (a) at b = 3.0 m V Between four diffusers (a) at b = 3.0 m l/s

Order details Specification text Type AIRNAMIC swirl diffusers for high levels of comfort and special architectural and design requirements. An excellent aerodynamic and acoustic function is ensured by aerodynamically optimised control blades as well as by a plenum box with a damper blade for flow rate balancing and an air distribution element (supply air). Horizontal air discharge with high induction. Special features – Newly developed air distribution element to ensure a uniform air flow through the supply air diffuser – Acoustically optimised damper blade for flow rate balancing – Spigot with...