Ceiling swirl diffusers Type FD Plenum box with dam­ per blade and square ​ diffuser face For comfort zones, with fixed air control blades Circular and square ceiling swirl diffusers that create high induction levels, for high ​ room air change rates ■■ Nominal sizes 300, 400, 500, 600, 625 ■■ Volume flow rate range 9 – 235 l/s or 31 – 846 m³/h ■■ Diffuser face made of galvanised sheet steel, powder-coated ■■ For supply and extract air ■■ For variable and constant volume flows ■■ For all types of ceiling systems, and with an extended border also suitable for ​ freely suspended installation Horizontal swirling air ​ discharge ■■ High induction results in a rapid reduction of the temperature difference and ​ airflow velocity ■■ Air change rates of up to 35 per hour can be achieved by arranging several ​ diffusers in a row with a minimum pitch of 0.9 m (centre line to centre line) ■■ Ideal for comfort zones Optional equipment and accessories ■■ Exposed diffuser face available in RAL CLASSIC colours ■■ Plenum box with cord-operated damper blade an

Ceiling swirl diffusers General information Page General information Function Technical data Quick sizing Specification text Order code Variants Dimensions and weight Product details Installation examples Installation details Commissioning Basic information and nomenclature Application – Type FD ceiling swirl diffusers are used as ​ supply air or extract air diffusers for comfort ​ zones – Attractive design element for building owners ​ and architects with demanding aesthetic ​ requirements – Horizontal swirling supply air discharge for ​ mixed flow ventilation – The efficient swirl creates high...

Ceiling swirl diffusers General information – Sound power level of the air-regenerated noise ​ measured according to EN ISO 5135 FD materials are not subject to wear – Inspection and cleaning to VDI 6022 Maintenance – Maintenance-free as construction and ​

Ceiling swirl diffusers Functional description Ceiling swirl diffusers in air conditioning systems ​ create a swirl to supply air to rooms. The resulting ​ airflow induces high levels of room air, thereby ​ rapidly reducing the airflow velocity and the ​ temperature difference between supply air and ​ room air. Ceiling swirl diffusers allow for large ​ volume flow rates. The result is a mixed flow ​ ventilation in comfort zones, with good overall ​ room ventilation, creating only very little ​ turbulence in the occupied zone. Type FD ceiling swirl diffusers have fixed blades. ​ Air discharge...

Ceiling swirl diffusers Horizontal omni directional air discharge

Ceiling swirl diffusers Technical data Nominal sizes Minimum volume flow rate, with ΔtZ = –6 K Maximum volume flow rate, with LWA ≅ 50 dB(A) Supply air to room air temperature difference

Ceiling swirl diffusers Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures. The minimum volume flow rates apply to a supply air to room air temperature difference of -6 K. The maximum volume flow rates apply to a sound power level of approx. 50 dB (A) with damper blade position 0°. Exact values for all parameters can be determined with our Easy Product Finder design programme. FD-*-Z-H (supply air), sound power level and total differential pressure 02/2017 - DE/en TROX ®TECHNIK

Ceiling swirl diffusers Specification text This specification text describes the general ​ properties of the product. Texts for variants can be ​ generated with our Easy Product Finder design ​ programme. Ceiling swirl diffusers with square or circular ​ diffuser face. Supply air and extract air variants for ​ comfort zones. Diffuser face with fixed air control ​ blades for horizontal swirling supply air discharge ​ creating high induction levels. For installation into ​ all types of suspended ceilings. Ready-to-install component which consists of the ​ casing, diffuser face, spigot, and a cross...

Ceiling swirl diffusers Type FD Swirl diffuser 2 Construction style R Circular ^ Damper blade for volume flow rate balancing No entry: without damper blade M With damper blade MN With cords and pressure tap (only for connection type H) [6] Accessories No entry: without accessories L With lip seal [8] Exposed surface No entry: powder-coated RAL 9010, pure white P1 Powder-coated, specify RAL CLASSIC colour Gloss level RAL 9010 50 % RAL 9006 30 % All other RAL colours 70 % Order example: FD-Q-Z-H-MN/500/P1-RAL 9016 Construction style System Connection Damper blade for volume flow...

Ceiling swirl diffusers variant) – Simple installation of the diffuser face due to ​ central fixing screw with decorative cap – Damper blade for volume flow rate balancing ​ (optional) – Pressure tap and cord-operated damper blade ​ for volume flow rate balancing (optional) – Lip seal (optional) Variant – Ceiling swirl diffuser with square diffuser face – With plenum box for horizontal duct connection Nominal sizes – 300, 400, 500, 600, 625 Parts and characteristics – Square diffuser face – Plenum box for horizontal duct connection – Square opening to accommodate the diffuser ​ face – Equalising...

Ceiling swirl diffusers central fixing screw with decorative cap – Damper blade for volume flow rate balancing ​ (optional) – Pressure tap and cord-operated damper blade ​ for volume flow rate balancing (optional) – Lip seal (optional) Construction features – Spigot suitable for circular ducts to EN 1506 or ​ EN 13180 – Spigot with groove for lip seal (if accessory lip ​ seal has been ordered) airflow through the diffuser face (supply air ​ variant) – Simple installation of the diffuser face due to ​ central fixing screw with decorative cap – Damper blade for volume flow rate balancing ​ (optional)...

Ceiling swirl diffusers Square diffuser face with plenum box for horizontal duct connection C FD-Q-*-H Nominal size AK-Uni-​ 001 AK-Uni-​ 002 AK-Uni-​ 003 AK-Uni-​ 004 AK-Uni-​ 004 Weights apply to the supply air variant Square diffuser face with plenum box for ​ vertical duct connection ∅D₃