External & Room Terminals

Room terminals are often the only visible part of a ventilation system. They need to be pleasing to the eye, but should also be functional and operating quietly. Room terminals that can be adjusted are also called ‘valves’.

• We distinguish between terminals for extract and supply air. Some valves can be used for both applications.
• Supply terminals need special attention, as their specific flow pattern should avoid drafts. In some cases it should project air from a wall into a room.

All of these should be adjustable, lockable and cleanable. We do promote the use of high-quality room and external terminals.

For us, the Airy 125 with round front plate in white, is the standard choice for single developments.

We normally use it with a mounting ring with double seals, as it allows more easy access, when inserted into a plenum.

The flush powder coated finish is unobstrusive, doesn’t discolours and doesn’t have that cheap plastic feel to it.

Like the Luna extract valve the supply valve can easily be adjusted and locked in position, showing position numbers, which can be noted down in the commissioning report.

For the extract terminal in domestic kitchens it is important to offer filtration against grease intake into the ductwork. Unless dust, grease deposits cannot be removed with duct cleaning equipment. Either filter cones behind the valve or a terminal with an in-built G3 grease filters offer a reasonable protection. However, filter cones, that are hidden, can easily be forgotten. We therefore recommend these large surface filter elements with visible filter.

We offer intumescent room terminals, which act as fire dampers when ceilings need to be fire protected.

In two storey single occupancy dwellings some professionals deem it best practice to protect the ground floor ceiling. Please check with your Building Control officer what the local requirements are.

Directionally seperated combi grilles are a good way to reduce the length of the intake and exhaust ducting, which saves space, insulation and materials. They have been tested in various weather conditions to keep cross-contamination at a minimum.