ISH

Quick sizing tables provide a good overview of the volume flow rates and corresponding sound power levels and differential pressures.

The maximum volume flow rates apply to a sound power level of approx. 55 dB (A).

ISH supply air, horizontal air discharge, sound power level and total differential pressure

ISH supply air, vertical air discharge, sound power level and total differential pressure

Impulse diffusers with a cylindrical casing, for industrial zones without air polluting work processes. With adjustable air control disc for air patterns from horizontal (0°) to vertical (90°). Large throw distances with horizontal air discharge. For free hanging installation and also for installation on walls or pillars.

Ready-to-install component which consists of a cylindrical perforated metal casing with air outlets, an air control disc and a top entry spigot.

Spigot suitable for ducts to EN 1506 or EN 13180.

Sound power level of the air-regenerated noise measured according to EN ISO 5135.

Special characteristics

• Large throw distance due to high discharge momentum
• Horizontal or vertical air discharge
• Free hanging installation above the occupied zone
• Air discharge direction is adjusted manually or with an electric or thermal actuator

Materials and surfaces

• Casing with base plate, cross bar and air control disc made of galvanised sheet steel
• Chain pull made of galvanised steel
• Pulley wheels made of plastic, UL 94, V-0, flame retardant
• B: Hand lever made of galvanised steel, Bowden cable made of galvanised steel and with PE sheath
• P0: Powder-coated RAL 9010, pure white
• P1: Powder-coated, RAL CLASSIC colour

Technical data

• Nominal sizes: 250, 355, 450, 560 mm
• Minimum volume flow rate: 205 – 785 l/s or 738 – 2826 m³/h
• Maximum volume flow rate, with L_WA ≅ 55 dB(A): 400 – 1585 l/s or 1440 – 5706 m³/h
• Supply air to room air temperature difference: –8 to +12 K

Sizing data

• V _______________________ [m³/h]
• Δp_t _______________________ [Pa]

Air-regenerated noise

• L_WA _______________________ [dB(A)]

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

Principal dimensions

ØD [mm]

Outer diameter of the spigot

ØD₁ [mm]

Outer diameter of the diffuser

m [kg]

Weight

Nomenclature

L_WA [dB(A)]

A-weighted sound power level of air-regenerated noise

V [m³/h] and [l/s]

Volume flow rate

Δt_z [K]

Supply air to room air temperature difference

Δp_t [Pa]

Total differential pressure

All sound power levels are based on 1 pW.