Technical documentation LAQ Ceiling return air diffuser SCHAKO | Ferdinand Schad KG Steigstrasse 25-27 D-78600 Kolbingen PERFORMANCE DATA  NW 310 / 400 / 500 / 600 / 625  Air volumes at 35 dB(A) from 350 m³/h to 1090 m³/h Air volumes at 35 dB(A) from 97 l/s to 303 l/s. SPECIAL FEATURES  suitable for return air only  three models available LAQ-F: Permanently mounted diffuser, with perforated faceplate, with clip mounting (-KM, non-detachable) LAQ-E: Removable diffuser, with perforated faceplate, with concealed mounting (-VM) via central screw. LAQ-K: Hinged diffuser, with perforated faceplate hinged on one side (click system), front frame fastened via central screw (concealed mounting -VM).

LAQ TECHNICAL DOCUMENTATION Overview of product versions | Function and use OVERVIEW OF PRODUCT VERSIONS LAQ-F-...-SK-Q-20-... LAQ-E-...-SK-Q-59-... FUNCTION AND USE The SCHAKO ceiling return air diffuser LAQ has been developed exclusively for use in return air systems. The square air diffuser consists of a perforated faceplate with plenum box for extraction of the return air from the room. The return air diffuser is suitable for VVS systems with variable volumetric flows. The faceplate consists of perforated sheet steel with high-quality powder coating in the colour RAL 9010 (white) or in other...

LAQ TECHNICAL DOCUMENTATION Models | Accessories MODELS LAQ-F Permanently mounted diffuser, with perforated faceplate, with clip mounting (-KM, non-detachable). Not available with filter mat. LAQ-E Removable diffuser, with perforated faceplate, with concealed mounting (-VM) via central screw. Can optionally be delivered with filter mat (ISO Coarse 25% - ISO Coarse > 45%). LAQ-K Hinged diffuser, with perforated faceplate hinged on one side (click system), front frame fastened via central screw (concealed mounting -VM). Can optionally be delivered with filter mat (ISO Coarse 25% - ISO Coarse >...

TECHNICAL DOCUMENTATION Due to the function, the ceiling return air diffuser LAQ is only available with plenum box. Construction subject to change No return possible

TECHNICAL DOCUMENTATION Spigot position øDmax for S5 Due to the function, the ceiling return air diffuser LAQ is only available with plenum box. Construction subject to change No return possible

TECHNICAL DOCUMENTATION Faceplate closed Click system Faceplate open Front frame Faceplate closed Click system Spigot position KHS = height of plenum box standard Special height of plenum box = øD + 102mm, but at least 200mm Due to the function, the ceiling return air diffuser LAQ is only available with plenum box. Construction subject to change No return possible

TECHNICAL DOCUMENTATION Dimensions of accessories | Fastening methods FASTENING METHODS Only possible for LAQ-E and LAQ-K. In concealed mounting (-VM), the ceiling return air diffuser is fastened to the plenum box by means of the central screw M6 (with hexagon socket head cap screw, according to DIN EN ISO 4762). Spigot position -S0 (not possible for LAQ-F) LAQ-K Cable-operated adjustment Rubber lip seal (-GD1), for SK-Q-… Detail X Volumetric flow meter (-VME1), for SK-Q-… Only possible for LAQ-F. The clip mounting (-VM) is used to fasten the ceiling return air diffuser permanently to the plenum...

TECHNICAL DOCUMENTATION Technical data | Legend TECHNICAL DATA Filter mat pressure loss Initial pressure loss at 1m/s: G2 – 14 Pa G3 – 19 Pa G4 – 19 Pa Recommended end pressure loss 250 Pa. Pressure loss and noise level (without filter mat) LAQ-...-SK-Q-…-A-... for return air, with plenum box Damper position (DS): 0% = CLOSED 100% = OPEN KF ϱ DS NW Construction subject to change No return possible return air volumetric flow Pressure loss A-weighted sound power level (LWA = LWA1 + KF) A-weighted sound power level, relative to one parameter Correction factor Density Damper position Nominal size

LAQ TECHNICAL DOCUMENTATION Order code LAQ |ORDER CODE LAQ 01 Sample LAQ-F-500-SB-9010-G0 Ceiling return air diffuser LAQ | permanently mounted diffuser, with perforated faceplate, with clip mounting | NW 500 | faceplate made of painted sheet steel | painted to RAL 9010 (white) | without filter mat ORDER DETAILS 01 - Type LAQ = Ceiling return air diffuser LAQ 02 - Model F = Permanently mounted diffuser (standard), with perforated faceplate, with clip mounting (-KM, non-de-tachable) (not available with filter mat) E = Removable diffuser, with perforated faceplate, with concealed mounting (-VM)...

LAQ TECHNICAL DOCUMENTATION Order code SK |ORDER CODESK 01 Plenum box, square design I for square diffusers | air diffuser LAQ-F | return air | NW 500 | clip mounting | galvanised sheet steel | with damper | with rubber lip seal | without volumetric flow meter | without ROB model | without insulation | standard height of plenum box | standard spigot diameter | 1 lateral spigot on the box 01 - Type SK = plenum box, square design 02 - Model Q = for square air diffusers 03 - Air diffuser (must be ordered separately) 20 = suitable for LAQ-F 04 - Air throw A = return air (standard) 06 - Fastening...

LAQ TECHNICAL DOCUMENTATION Specification text | SPECIFICATION TEXT Perforated return air diffuser for use in return air systems. The diffusor is suitable for extraction of the room exhaust air. The ceiling return air diffuser is suitable for VVS systems with variable volumetric flows. - Permanently mounted diffuser, with perforated faceplate made of sheet steel (-SB) painted to RAL 9010 (white, -9010) or to another freely selectable RAL colour (-xxxx). With clip mounting (-KM, non-detachable). Not available or not suitable for use with filter mat. Product: SCHAKO type LAQ-F-... - Removable diffuser,...