A plaster-in diffuser is not the grille you choose at the end of a project. It is a ceiling decision that has to be made before the carpenter cuts the first opening. Where system suppliers start from airflow schedules, we start from the ceiling detail: the opening, the radius, the reveal, the finish, and the … Read more
Refurbishment specifiers learn this the hard way: a linear slot diffuser pulled from a manufacturer’s catalogue almost never sits cleanly into a heritage ceiling. The gap between the spec sheet and the site is usually a quiet design failure that surfaces only at first fix, when the architectural intent is already locked. This brief outlines … Read more
TL;DR Passive HVAC air diffusers, grilles, and linear slot diffusers do not fall within the scope of any CE directive. Under Regulation (EU) 765/2008, affixing a CE mark to a product category that is not covered by a harmonized directive is considered improper labeling — regardless of where the product is manufactured. The one exception … Read more
Why the CE question trips up architects every time A European architect we work with forwarded us an email from her MEP engineer last month. The subject line read: “CE certificate for the linear slot diffuser — urgent.” The supplier, a Chinese factory competing on the same project, had sent back a glossy one-page PDF with … Read more
