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RCM Products - Grilles, Louvres & Diffusers

Grilles - Louvres - Diffusers - Stylojet - Punkah - SLD Linear Slot

RCM was established in 1948 as Richard Crittal Marine, manufacturing the ‘Stylojet’ diffuser range of products, and was based in Great Portland Street, London. In the intervening years we have developed into one of the country’s leading suppliers of air distribution equipment with a reputation for providing the highest quality products.

Operating from our manufacturing facility in Kempston, Bedfordshire, RCM has a portfolio covering an extensive range of standard products of grilles and diffusers which has been augmented by the inclusion of louvres, plenum boxes, swirl and slot diffusers.


The RCM range of grilles is diverse with a number of options including, square, rectangular, heavy duty, linear, floor and door. We would be happy to discuss your requirements and specification of the project. Our products are designed for quality and performance, adding to this our very competitive pricing, RCM is specified by a growing customer core of architects and engineers. In addition to offering the right products at the right price, RCM’s high level of service provides the complete package.

Whilst RCM grilles follow the established market prerequisite for aluminium louvred fabrications in square and rectangular formats, a choice of core and border styles can be offered to enhance both architectural and functional requirements.


Our range of ventilation louvres offers a number of options; acoustic, moveable blades, louvre doors, tower louvres and natural ventilation. The louvre range is made to very exacting standards and is available in our full range of finishes.

Our famous Punkah Louvres, whilst not a true louvre have been installed in a number of very high profile locations including Concord and The Louvre, Paris. These are supplied to, amongst others, MoD Procurement for a number of applications across the armed forces.


RCM offers louvre faced diffusers manufactured from extruded aluminium, they are offered in square, rectangular and round formats. Swirl diffusers, linear slot range offering standard 20mm, high capacity 25mm and perforated plate diffusers are just a few of the designs from the wide range on offer from RCM.

Also in the range is our Air Track high capacity slot diffuser, it is designed to combine a particularly high air handling capacity with maximum flexibility and is suitable for either sidewall or ceiling applications. The system is very flexible and can blend into a design or provide contrast with its exceptional but simple design.

Linear Slot Diffuser, 20/25mm Border (SLD)

SLD linear slot diffuser is adjustable, versatile and can be incorporated into most interiors to give a pleasing and discrete appearance. It can be used for ceiling or sidewall supply or extract and the adjustable blades allow for an extensive range of directional control.

Bespoke Products - our speciality

Here at RCM Products we pride ourselves on our flexibility and are more than happy to undertake special bespoke projects and would be delighted to discuss the options with you. We work with a variety of materials, as well as aluminium we can offer stainless steel, brass, bronze, chrome and nickel coated finishes alongside an unlimited range of colours.

RCM has the unique ability to manufacture most grilles and louvres to any shape or size; for larger projects we will also design specific extrusions for you.

RCM Products offers a wealth of experience in technical, manufacturing and product development fields, enabling RCM to offer our customers a choice of products most suited to their needs and manufactured to the highest standard.

Customer Service – Before, During & After

We believe that you, the customer, is the most important part of the business. Our proactive approach ensures that you receive the highest possible service from RCM Products

Customer satisfaction is key to us, we treat all our customers with respect and with a professional attitude thereby creating a successful and enduring partnership, safeguarding the longevity of our company through repeat and referral business.

Call or email us today to discuss the services RCM can offer you.

We offer standard and special configurations of a full range of grilles, diffusers and external louvres. These are all assembled with fully welded corners offering a robust construction with a superb finish.

Grilles, Louvres, Diffusers

Request RCM Products Info

RCM Product Range

RCM Products
12-14 Sunbeam Road
MK42 7BY

Email RCM Products

Tel: 01234 843303
Fax: 01908 483930

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