Innovation built on experience

Ventient SCW-SH

SCW-SH Trickle Vent

Proctor Ventient SCW-SH Trickle Vent

With wind dampening and passive temperature sensing flow

Product Description

The Ventient SCW-SH is precision manufactured aluminium trickle vent that can be accommodated into a wide range of curtain wall and window frames.

The Ventient passive shape memory technology, without electric power, sensors or human intervention, automatically controls ventilation flow dependent on ambient temperatures, optimising the benefits of passive ventilation. Ventient SCW-SH also incorporates a passive wind dampener to manage water ingress and drafts normally  associated with high wind gusts.

Ventient SCW-SH



Improvements in construction create buildings that are more airtight than previously, with the result that infiltration or leakiness is no longer providing a pathway for make-up air for exhaust systems.

Athough many building are complying with building code requirements by having sufficient openable windows, changing lifestyle patters, concerns about noise and security and generational differences mean that ventilation from open windows tends to be infrequent.

Unlike conventional systems such as operable windows or louvres, Proctor Ventient SCW-SH can get on with the job of providing fresh air circulation regardless of occupancy.


As part of the total ventilation system Proctor Ventient can provide continuous ventilation to spaces even if they are unoccupied and is perfect for  student accommodation, hotels, age care, healthcare and educational facilities.

Ventient is an ideal solution for residential buildings such as modern air tight homes and medium or high rise developments, as modern lifestyles mean that occupants are unable to mange purge ventilation and often  return home to a stuffy environment.



The Ventient SCW-SH is installed into the Ventient SH  head, transom or sill in accordance with the  install guide. Installation is also possible into curtain wall or other custom designed window frames. The vent should be completely serviceable from the interior.

Exhaust Make-up in Lieu of Supply

Where it is not possible to meet the code requirements for natural ventilation, or where the design preference is for a specific air change rate and 24 hour provision of fresh outside air without leaving windows open,  Ventient, in conjunction with low energy, mechanical extract ventilation can provide or contribute to supply ventilation as required when calculated in accordance with AS1668.2.


General Exhaust Make-Up Air

AS1668.2 draws to the attention of designers that increased air-tightness of modern buildings requires consideration of sources of make-up air.   Make-up air drawn through gaps and service penetrations does not meet the requirements of Clause 2.3 within the standard and can lead to the loss of amenity in the enclosure.

Ventient SCW-SH could be an acceptable permanent natural ventilation opening as required in Clause 2.3.

Sample Specification

Install Proctor Ventient SCW-SH Trickle Vent wth shape memory alloy thermal actuator in accordance with the user guide.

Device Length: ________mm (L1 from figure 1)

Cover length: L2 _____mm &  L3 ____mm  (see figure 1)

Optional features:  (from table 2)


Ventilation volume at ⊿P12Pa: (from PQ data)

Colour:  (from table 1)

SMA Minimum Temperature: 12°C (other temperatures available)

Table 1 Performance 
Open area (A)65cm² – 280cm²
Effective open area (αA)18.9cm² – 88.3cm²
Air Tightness (when closed)11.58 m³/hr.m²  at 100Pa
Water tightness (when closed)2700Pa
Water tightness (when open with damper activation)2700Pa
Damper activation3200Pa
Acoustic Ratings4Please contact for details

Standard Sizes and Colours 

Length (L1)500 mm  ~ 1,500mm
Dimensional tolerance (L1)500 mm  ~ 1,500mm
Standard available colours for main unit in gloss or matt anodized finish. Removable interior face cover also available in mill finish.

Proctor Ventient

Silver                           Black

Table 2 Optional Features
Shape Memory Alloy (SMA)

Thermal Actuator

– Fully Open

– Minimum Open (typically 33%)

Other set point are available 






Other set point are available


Mesh to resist vermin, insects and windblown material.Available with max. 2mm aperture.5
Air Filter (average arrestance)Type B (19%)
Manual Operation

– Closable

– Openable

Left side and right side lever options available.



Standard (Auto mode)


Intumescent fire barrierAvailable option
Acoustic attenuationAvailable option4
 MaintenanceInterior face cover can be removed from the interior to clean the device and filter.
Constant air flow dampeningAvailable as standard.

Figure 1: Ventient SCW-SH dimensions



Internal testing.

Internal testing. No leakage when tested at a constant 700Pa for 15 minutes.

3 Dampener pressure activation can be custom set

4 Acoustic attenuation options are available with the Ventient SH extrusion and optional internal covers.

Incorporated into Ventient SH extrusion. Otherwise the location of mesh depends on installation but is usually toward the external face of the fixing frame.

 *Note that the degree of opening may not always reflect the exterior temperature, as this will periodically differ from the ambient temperature where the SMA actuator is located closer to the interior. There is also a lag in adjustment to sharp changes in temperature.

The details supplied here are based upon good practice and currently available information. Advice regarding this product should be taken as a guide only. We reserve the right to change product specification without notice so please refer to our website for the latest version of this document.  Please contact us to discuss your project and any technical enquires.