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Trimvent® Select Xtra S16

Surface mounted slot ventilator


Trimvent Select Xtra S16 is a surface mounted plastic slot ventilator that fits over a 16mm slot in a window and provides an Equivalent Area (EA) of 4600mm² when fitted with the XC16 canopy.

The XS16 is ideal for both new build and refurbishment situations using any window material, and is available in a variety of colours.

The Xtra design improves the Trimvent Select range to offer increased ventilation. It gives optimum airflow (and therefore EA) utilising existing Trimvent Select slot sizes and vent lengths, making them 60% more efficient than previous models. It has been specifically developed for recent revisions to Part F of the Building Regulations for Ventilation (England & Wales), is optimised for use with the Scottish Technical Standards and to improve performance for requirements throughout the UK and Europe.

Trimvent Select ventilators have been specified and fitted on millions of windows throughout the UK and mainland Europe over the last 20 years.

Suitable for

  • PVCu

Features & Benefits

  • Uprated design to improve performance and Regulations compliance
  • Unique occupant controllable tilting T-bar
  • Rounded unobtrusive shape
  • For use over 16mm slot
  • Based on successful Trimvent® principle
  • Sculpted finger recess
  • Patented and registered design
  • Available in vent and canopy packs
  • When specified correctly complies with Building Regulations

Technical Information

Technical Information


Product Product Code (L) Length (W) Width (P) Projection Closed-Open EA (mm²) Free Area (mm²) Slot Detail /
Free Area of Slot (mm²)
XS16 4600EA vent TS1164670 366 21 – 31 16 – 28 4600 4511
XC16 364 canopy TS2164040 364 22 32.5 4600 4990
XS16 & XC16 4600EA pack TS4164670

EA figures above and marked on trickle vents are achieved when fitted to manufacturer’s recommendations.
Tested in accordance with BS:EN 13141-1 (2004).

This product does feature some protrusion into the slot. If the recommended slot size has been cut then the protrusion will not affect fitting or claimed performance. Please contact us if you are using an existing slot which is different to that shown. Using a product without locators could affect the stability of the product in certain extreme conditions.

Manufactured from

Vent – PBTP (UV Stable) & POM, Canopy – PVCu

Recommended screws

3.5mm (No.6) Pan Head or equivalent


Tested in accordance with BS EN 13141-1:2004 (airflow, air leakage and weather tightness)
Acoustic performance tested in accordance with BS EN ISO20140-10:1992, BS EN ISO140-10:1991 and single figures to BS EN ISO717-1:1991


(Full test details available on request)
Equivalent Area – See above
Free Area – See above
Air Leakage (m³/hr @ 50Pa) – 2.12
Water Resistance (Pa) – 600
Acoustic Dn,e,w (+/-) – vent open 31 (0;0), vent closed 41 (-1;-2)


Suffix product code with:
-392 (white), -315 (brown), -496 (bright white), -662 (toffee)
Other colour options available. Please contact sales for details.



Manuals and Documentation

Trimvent Select S16 - Operation and Maintenance Instructions

31.38 KB (English)

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Trimvent Select Xtra S16 - Fixing Instructions

79.21 KB (English)

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Trimvent Select Xtra S16 - Catalogue Page

1.13 MB (English)

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