Double Deflection Grille – Custom Size

A single deflection grille has one row of adjustable blades, directing the airstream on one axis. A double deflection grille adds a second row behind the first, set at right angles, so you can direct the air both horizontally and vertically. Double deflection is the usual choice for supply air where throw and spread need adjusting; single deflection suits simpler supply applications.

Sizes are neck sizes — the duct or opening dimension behind the grille. The overall face is 45mm larger on both axes, so a 300mm x 300mm neck grille has a 345mm x 345mm face. When replacing an existing grille, measure the opening rather than the visible face.

Robust, corrosion-resistant aluminium, powder coated to RAL 9010 (white). The blades adjust individually so airflow can be directed exactly where it is needed, and the clean modern face suits residential, commercial and industrial interiors alike. They fit standard rectangular openings and can be connected to round ducting using a matching plenum box.

Stock squares run from 150mm x 150mm up to 1000mm x 1000mm for single deflection and up to 550mm x 550mm for double deflection. Beyond those, the custom-size products are made to order to your exact width and height, from 100mm up to 1000mm per axis, with an instant price as you type your dimensions.

Yes — the Double Deflection Grille with Damper adds an integral opposed-blade damper behind the grille face, so airflow can be balanced or closed off at the terminal itself during commissioning. It is made to order as a custom-size product: enter your neck width and height on the product page for an instant price.