Greenwood | Low Energy Bathroom Fan, Heat Recovery System, Whole House Ventilation

DN Vent

Acoustic window ventilator
DN Vent provides 37dB acoustic attenuation and provides 1400mm2 equivalent area. Available in white and supplied with D Vent for inner vent installation. Manufactured from PVC.
Features & Benefits
Models & Control Options
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Features and Benefits


The DN Vent is an acoustic window vent providing acoustic attenuation up to Dn,e,w 37(dB).


  • 1400mm² equivalent area (England & Wales)


  • 1600mm² free area (Scotland)


  • Front operation only


  • Internal unit (D Vent) provides upward deflection of airflow


  • Suitable for installation up to two floors only


  • Available in white

Models & Control Options

Physical Specification
Product code 1600DN

External 1600DN

Internal 2000DN

Equivalent area (mm2) 1400

Dimensions (mm)

l x h x d

278 x 22 x 11

202 x 22 x 11

Slot height (mm) 15.5

Slot Size (mm)




Control F
Colour W

Scottish Building Regulations: Free area performance 1600DN = 1600mm2.

Control: Front flap only (F).

Colour: White (W).

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