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WLM (WLMS / WLMD) Rectangular Variable Air Volume

    • Product Details


      The Waterloo variable air volume damper supplies a controlled volume of air, independent of the duct pressure. The unit consists of a Waterloo Flow Sensor, a damper section and a motor with an integrated controller.

      The external motor controls the required air volume between factory commissioned maximum and minimum settings. Depending on the chosen controller a BMS control system can be connected to the unit. If required the unit can be set as a constant volume damper.

      Single skin and double skin insulated units are available.

      Product Description

      • WLMSSingle Skin Air Volume Damper
      • WLMDDouble Skin Insulated Air Volume Damper


      • Adjustable for air velocity of 2.0 - 10 m/s
      • Accuracy ± 10%
      • Suitable for mounting in all positions
      • Minimum straight duct is 2x longest dimension (W/H) of unit
      • Manufactured in standard duct sizes
      • Factory set
      • Settings adjustable on site
      • Controls from a number of different manufacturers may be fitted.


      Casing: Zintec Plate

      Damper: Aluminium


      Nom. Width 200 - 1000 mm in Increments 50 mm

      Nom. Height 200 - 600 mm in Increments 50 mm

      Accessories (Transformer)

      • WT24.240240v to 24v AC Power supply

      Product Specification

      Related links

      VAV Commissioning Factors

      VAV Compact controller datasheet

      VAV Selection - Guidance

      WVSV - WLM - WR Series Operation and Maintenance Instructions

      Waterloo Mill Finish


      For more information please use our contact form;

      Call our Sales and Customer Service Hot Line:

      01622 711511



    • Product Images

      WLM Rectangular Variable Air Volume


      WLMS, WLMD Rectangular Variable Air Volume

    • Product Model Data