Ceiling Diffuser Mounting Methods - Rickard Air Diffusion

The Rickard Ceiling Diffuser Range supports a wide range of diffusion unit styles.

EXPOSED TEE CEILING GRID

SQUARE DIFFUSER

i. Drop-in Flush Mounting
ii. Drop-in Shadow Line

The basic diffuser usually drops into a square opening between ceiling tees. Flush Mounting and Shadow Line styles are available. These can be supplied with the following mounting plate sizes, 495x495mm, 595x595mm & 23¾x23¾” to suit 500x500mm, 600x600mm & 24×24” ceiling grids respectively. Special sizes are available on request.

BAFFLED CEILING

SQUARE DIFFUSER
4 Point Fixing (4 Brackets for threaded rod connection)
ROUND DIFFUSER
i. 3 Point Fixing (3 Brackets for threaded rod connection)
ii. Hard Duct Connection (No accessories required)

Baffled ceilings require and unusual treatment which is not illustrated. Normally this ceiling requires a square tile with suspension points fitted at each corner thereby enabling support from the top edges of the baffles. Large diffuser mounting plates are particularly beneficial in the baffled ceiling as there is otherwise little opportunity for the Coanda effect to help distribute conditioned air across the ceiling. This may result in inadequate throws and poor room air movement.

PLASTERED CEILING

SQUARE DIFFUSER
i. 4 Point Fixing (4 Brackets with Backing Plates)
ii. T-Frame (To allow Drop-in Flush Mounting)

In the case of mounting square diffusers into plastered ceilings, two methods of fixing may be used. Concealed fixing is achieved by four fixing studs secured in the corners of the mounting plate. These pass through the ceiling and, with the use of backing plates, are used to secure the diffuser to the ceiling. A further option for fixing into a plastered ceiling is with the use of a T-frame which is an optional extra. This is fixed to the ceiling and the diffuser then drops into it.

4 POINT FIXING (4 BRACKETS WITH BACKING PLATES)

T-FRAME (DROP-IN MOUNTING FOR PLASTERED CEILINGS)

ROUND DIFFUSER
i. 3 Point Fixing (3 Brackets to allow Bayonet attachment)
ii. T-Ring (Frame to allow Drop-in Flush Mounting)

Apart from the usual four-corner style, the Rickard Ceiling Diffuser is also available in a circular format. This model is most often combined with round down-lighters to preserve the circular pattern, and in particular with plastered ceilings. It also offers the absolute minimum interruption to the ceiling for those who prefer to have its unbroken regularity maintained.

Fixing of round diffusers in a plastered ceiling often presents a problem because of restricted access to the ceiling void. This problem is overcome with a diffuser that is fitted with three clips that allows the Diffuser to be twisted and clipped into a hole created in the ceiling. The installer need only cut a round hole with three notches (stencils provided with each order) and the diffuser twisted into place. Removal is as easy, a simple twist in the opposite direction and the round diffuser can be removed. The entire operation can be carried out without ever needing to enter the ceiling space.

ROUND DIFFUSER (WITH 3 BRACKETS FOR DIFFUSER ATTACHMENT TO PLASTERED CEILINGS)

PLASTERED CEILING CUT-OUT DETAIL FOR ROUND DIFFUSERS

Alternatively, a T-Ring is available to allow Drop-in Flush Mounting of a standard Round Diffuser. The T-Ring is mounted flush with the ceiling after a round hole with a diameter of 590-600mm is cut into the plaster board. Four threaded brackets draw the T-Ring flush against the ceiling to ensure a neat finish.

T-RING (DROP-IN MOUNTING FOR PLASTERED CEILINGS)