Profile: Waterloo Group Ltd. designs and manufactures ventilation system. Our products include grilles, diffusers, louvres, chilled beams and displacement products. The 1RV & 2RV adjustable duct grilles are designed to fit directly onto the side of an exposed circular duct without the need for a stub duct or transition piece. The flange is supplied complete with a foam sealing gasket on all 4 sides. These units can be provided with either a single row of vertical blades, or a set of vertical blades at the front and a set of horizontal blades at the rear. There are a range of sizes for each grille to suit ducts from O125 - O1500. Each grille can be supplied with an aluminium opposed blade damper if required. Active chilled beams is a compact ceiling or surface mounted unit for heating and cooling. With the supply of primary air through nozzles, secondary room air is inducted through a heat exchanger. This is then supplied with cold or hot water, for chilling, or warming, and a multitude of nozzle configurations are available to meet any project requirements.