CHM

MULTIFUNCTIONAL WALL DIFFUSER

Wall diffusers for supply air, extract air, or as a supply and extract air combination with various diffuser faces, for installation in the ceiling bulkhead or wall, e.g. above
doors

Wide range of applications due to different diffusers faces and optional additional functions

Diffuser face with slot diffusers, type PURELINE
Nominal lengths 550 – 1175 mm
Easy and tool-free assembly of the diffuser face, e.g. after completion of all preliminary work

Optional equipment

Removable optional splitter for improved cross-talk sound attenuation.
Prepared for room-side mountable volume flow limiter for setting the maximum volume flow rate
Spigot with damper screen for volume flow rate balancing and/or lip seal
Mounting bracket for secure wall mounting
Different looks thanks to colourless anodised or powder coated slot diffusers and manually adjustable air control blades, optionally in black, white or grey

General information

Application

Wall diffusers as supply or extract air diffuser, or as supply and extract air combination in ventilation systems for comfort areas
The diffuser face can be fitted with type PURELINE front rails
Airflow with ceiling effect or directly into the room as turbulent mixed ventilation
Depending on the setting of the air control blades, thevminimum installation height is defined
High induction causes a rapid reduction of the temperature difference and the airflow velocity
For constant and variable volume flows
For supply air to room air temperature differences of -10 to +10 K
For room heights up to 4 m (lower edge of suspended ceiling)
Space-saving installation in walls and ceiling bulkheads
Optionally with mounting brackets for wall mounting (wall thickness 90 to 130 mm)

Special characteristics

Uniform air pattern to reduce dirt deposits that occur on the wall due to induced room air
One-sided supply airflow with ceiling influence, or directly into the room through manually adjustable air control blades
Large penetration depths or throw distances due to direct airflow into the room
Airflow with ceiling influence leads to air distribution below the ceiling with a positive effect on airflow velocity and comfort
Splitters (removable from room side) as cross-talk silencers (optional):
To reduce sound transmission to adjacent rooms via the air duct system
Optionally with flow rate limiter for setting the maximum volume flow rate
Tool-free fixing for easy and safe installation of the front rail
Installation of the front rail still possible after completion of all preparatory work
Comfortable room climate due to rapid reduction of temperature differences and airflow velocities
High-quality appearance due to extruded aluminium sections with anodised finish or powder coating (according to RAL CLASSIC colour scale)
The front rail has been optimised for maximum volume flow rate at low sound power levels

Nominal sizes
Nominal length LN

550, 850, 1000, 1175 mm

Casing depth (without spigot)

340 mm

Casing height (without mounting bracket)

145 mm

Nominal width of air duct (DN): The actual diameter of the spigot depends on the selected variant.

100, 125 mm

Variants
Diffuser face

-PL35: powder-coated front plate with 1 × 3-slot front rail PURELINE35
-3PL35: powder-coated front plate with 3 × 1-slot front rail PURELINE35
-3PL18: powder-coated front plate with 3 × 1-slot front rail PURELINE18
-2PL50: powder-coated front plate with 2 × 1-slot front rail PURELINE50

System

-S: Supply air
-E: Extract air
-SE: Supply and extract air combination

Construction
Diffuser face finish

Type PURELINE front rails anodised, E6-C-0 (natural colour)
-P1: Type PURELINE front rails powder-coated in RALCLASSIC colours
Front plate powder-coated in RAL 9010
-P2: Front panel powder-coated in RAL-CLASSIC colours
Manually adjustable air control blades optionally in black, white or grey

Attachments
Splitter

Without splitters: Supply air variants with integrated perforated plate for uniform airflow through the diffuser
-CT: with splitters (removable from the front) to improve cross-talk sound attenuation to reduce sound transmission via the air duct system

Volume flow limiter

Without volume flow limiter:
With standard connection spigot - optionally available with damper screen for volume flow balancing and/or lip seal to reduce duct leakage
Prepared for volume flow limiter:
With enlarged outer diameter of the spigot for insertion of a volume flow limiter on the room side - e.g. type VFL
Damper screen (-D) and lip seal (-LS) not possible with these variants

Construction features

Standard spigot suitable for round air ducts according to EN1506 or EN13180
Manually adjustable air control blades with detent for defined adjustment of the airflow
Factory preset airflow that can be manually adjusted on site (only airflow with ceiling influence or direct airflow into the room)
Standard spigot with groove for lip seal (only for version with lip seal)
Wall diffuser available in nominal lengths 550 - 1175 mm
Mounting brackets for wall mounting: Wall thickness 90 – 130 mm
Fixing material for front diffusers is enclosed loosely, packed in a drawstring bag

Materials and surfaces

Front plate, plenum box, spigot and cassette for splitter mounting made of galvanised sheet steel
Front rails made of extruded aluminium profiles
Air control blades made of ABS plastic, UL 94, V-0, flame retardant
Lip seal made of Evoprene
Acoustic lining made of mineral wool
Front rail anodised E6-C-0 (natural colour) or powder-coated (-P1), colour according to RAL CLASSIC
Surface front plate powder-coated in RAL 9010 or another RAL CLASSIC colour (-P2)
Air control blades similar to RAL 9005, jet black
-W: Air control blades similar to RAL 9010, pure white
-G: Air control blades similar to RAL 9006, grey

Mineral wool

Mineral wool on surfaces in contact with air laminated with glass fibre fabric, abrasion-resistant up to 20 m/s
According to EN13501, building material class A1, noncombustible
RAL quality mark RAL-GZ 388
Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008
Inert to fungal and bacterial growth

Standards and guidelines

Sound power level of the air-regenerated noise measured according to EN ISO 5135.
Conforms to VDI 6022
Transmission loss according to ISO 7235

Maintenance

Low maintenance as construction and materials are not subject to wear and tear
Inspection and cleaning according to VDI 6022

Technical information

Schematic illustration, CHM-35-* as supply and extract air combination

1 Diffuser face consisting of front plate and front rails
2 Adjustable air control blade
3 Plenum box

Optional
4 Mounting brackets for wall mounting (wall thickness 90 - 130 mm)
5 Spigot, prepared for the installation of a volume flow limiter
6 Flow limiter type VFL (to be ordered separately)
7 Standard spigot
8 Damper screen
9 Lip seal
10 Splitters (removable from room side)

Wall diffusers allow the supply air of ventilation and air
conditioning systems to flow into the room, with ceiling influence or directly. The airflow occurs with a high induction of the room air. This quickly reduces the air velocity and the temperature difference between supply air and room air. The result is a mixed ventilation system for comfort areas with good room air circulation and low turbulence in the occupied zone. The wall diffusers are equipped with a removable front plate. The front plate contains front rails type PURELINE, which are supplied with factory-set air control blades. The air control blades can be adjusted manually on site. The different airflow directions allow adaptation to different local conditions at any time. The supply air to room air temperature difference may range from -10 to +10 K.

To increase transmission loss and reduce sound transmission
into adjacent rooms, the diffuser can optionally be equipped with
splitters in the plenum box. Damper blades (optional) in the
spigot enable the volume flow rate to be balanced during
commissioning. The damper screen is adjusted via the opening for the diffuser face. Alternatively, the wall diffuser CHM can also be pre-equipped for combination with a volume flow limiter VFL. The volume flow limiter is set according to the local system parameters and can be mounted from the room side via the opening for the diffuser face. For an architecturally uniform
design, the CHM type can be used as an extract air diffuser or
also as a supply and extract air combination.

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design program.

Specification text
Wall diffusers as supply or extract air diffusers, or as supply and extract air combination, for the supply and extraction of air in ventilation and air conditioning systems. Consisting of a plenum box with spigot for connection to the on-site duct system and a removable front plate. Extract air variants are also available without spigot or without a connection option to the on-site duct system. The front plate serves as a carrier for the front rails, which are integrated into the front plate. Air is directed into the room via manually adjustable air control blades which are integrated into the front rails. The airflow with ceiling influence or direct air flow into the room can be preset at the factory. Optionally, splitters are available for improved cross-talk sound attenuation (can be removed from the room side). In addition, the wall diffusers can also be optionally extended with a finely adjustable volume flow limiter in round design.

Material

Plenum box and spigot made of galvanised sheet steel
Cassette for holding splitters made of galvanised sheet steel (can be removed from the room side)
Splitter frames made of galvanised sheet steel
Front plate made of galvanised sheet steel
Mounting brackets made of galvanised sheet steel
Front rails made of extruded aluminium profiles
Air control blades made of plastic ABS, UL94, V-0
Splitters' sound insulation material made of mineral wool, laminated with glass fibre fabric on surfaces in contact with air

Surfaces

Front plate powder-coated, RAL CLASSIC colours
Front rail anodised (E6 C-0), natural colour
Front rail powder-coated, RAL CLASSIC colours
Air control blades black, similar to RAL 9005
Air control blades white, similar to RAL 9010
Air control blades grey, similar to RAL 9006

Nominal size
Length [mm]
550, 850, 1000, 1175

Plenum box depth [mm] (without spigot) 345

Nominal width (DN) Spigot [mm] 100, 125

Technical data / design data

Design-specific

Standards and guidelines

Conforms to VDI 6022
Sound power level in air-regenerated noise measured according to EN ISO 5135
Transmission loss according to ISO 7235
Mineral wool according to EN13501 of building material class A1, non-combustible, with RAL quality mark RAL-GZ 388
Mineral wool according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008

Variants

Various front plates with integrated front rails
Optionally with or without splitters
Optionally with standard spigot or prepared for room-side installation of a volume flow limiter
Variants with standard spigot optionally with lip seal and/or damper screen
Optionally with mounting brackets for wall mounting (wall thickness 90 to 130 mm)

Accessories

Volume flow limiter for insertion, e.g. type VFL

Equivalence criteria

Uniform air pattern to reduce dirt deposits on the wall
Air distribution with ceiling influence or directly into the room via manually adjustable air control blades
Splitters can be removed tool-free due to interlocking connection
Glass fibre fabric abrasion-resistant up to 20 m/s
Mineral wool harmless to health due to high biosolubility
Mineral wool with glass fibre fabric, inert to fungal and bacterial growth
Prepared for volume flow limiter that can be mounted from the room side
Volume flow limiter aerodynamically tested and factory set to reference volume flow rate
Limiter adjustable via volume flow rate scale (values in l/s, m³/h and cfm)
Front plate can be mounted tool-free after completion of the installation work

Make of the tender

TROX

Type

Downloads

product information

Product data sheet CHM

CHM_PD_2023_09_20_DE_en 1,3 MB pdf

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