"Air conditioners, air conditioning apparatus and air condition systems; valves (for drainage); control elements for use in air conditioning and ventilation components; filters; floor convectors; radiators; valves for radiators; heating, steam breeding, cooling, drying, air conditioning and ventilation apparatus including air curtain apparatus; air filters and air filter systems, heat pumps, duct chains as part of heating and air conditioning systems; ventilators for air conditioning; air cleaners for air conditioning; swirl diffusers; displacement flow diffusers.
Appareils de climatisation, appareils et installations de climatisation; robinets (d'évacuation); éléments de commande utilisés pour éléments de climatisation et de ventilation; filtres; convecteurs de sol; radiateurs; robinets de radiateurs; appareils de chauffage, de production de vapeur, de refroidissement, de séchage, de ventilation et de climatisation y compris rideaux d'air; filtres à air et systèmes de filtres à air, pompes à chaleur, serpentins cylindriques comme parties de systèmes de conditionnement d'air et de chauffage; ventilateurs pour la climatisation; purificateurs d'air pour la climatisation; <B>diffuseurs à tourbillon; diffuseurs à déplacement d'air.
http://www.wipo.int/ipdl/en/madrid/key.jsp?KEY=910378

"Filtrasept casing is a white epoxy powder coated welded mild steel unit. It is supplied with corrosion proof fittings to hold the HEPA filter and diffusor in place.
The air is supplied through a circular, side mounted spigot into which a shut off damper, air tight to DIN 1946, may be fitted, and is accessible from the room side.
Filtrasept can be supplied with two-way, four-way or swirl diffusors</a>, fitted through a simple central attachment or with perforated plates, fitted with 4 corner screws or hinches. The standard colour for these elements is white (RAL 9010 for the perforated plates, RAL 9002 for the diffusors). Other colours are available on request.
All casings are fitted with both pressure drop and seal leak test connections. Both are accessible from the room side once the air distribution element is removed. The filter may then be tested to DIN 1946 using the with a seal test instrument."
http://www.vokesair.com/index.php?id=307&L=4&K=11