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Trickle Vents

Trickle vents have to meet the minimum air flow rates as defined in the British Building Regulations.

Should it be required, OS-29⁺ can be specified with discreetly designed trickle vents which are installed the frame extender for additional ventilation, ensuring the doors meet and surpass building regulations.

Frame Extender

A 35mm frame extender is available, allowing for thicker plaster lines on ceilings, and as well as more room for trickle vents to be fitted.

Drip Bar

A 60mm drip bar is also available.

Cills

A 240mm powder coated cill can be added to complement OS-29^+.