Innovation built on experience

Ventient Round Wall RWV

Proctor Ventient Round Wall Vent (RWV)

Round wall vent with passive temperature sensing flow

Product Description

The Ventient Round Wall Vent (RWV) is precision manufactured AES plastic vent for interior or exterior applications with passive temperature sensing flow control.


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.

Although many building are complying with building code requirements by having sufficient operable 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 RWV 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 Round Wall Vent is installed into a masonry or timber frame wall as shown on page 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 SFV could be an acceptable permanent natural ventilation opening as required in Clause 2.3.


Sample Specification

Install Proctor Round Wall Vent (RWV) with shape memory alloy thermal actuator in accordance with the user guide.

Optional features:  (from table 2)

Product Code: VENTIENT RWV

SMA Temperature: A (3°C) / B (12°C)

Colour:  Grey

Ventilation volume at ⊿P 12Pa: 83.6 L/s

Table 1 Performance 
Open area (A)140cm²
Equivalent open area (αA)84.5cm²
Ventilation Volume (Q) l/sQ= 33.5(⊿P/9.8)0.54
Acoustic RatingsThe Ventient Sub Floor Vent is not an  acoustic vent but can be used in conjunction with an acoustic duct.
MaterialHighly UV resistant AES plastic
Ventilation volume (at ⊿P)12Pa:  37.4 L/s

30Pa:  61.6 L/s

Standard Sizes and Colours 

Size (external facing)External Φ 225mm Internal Φ 200mm

Depth: 66mm

ColoursMasonry Grey
Table 2 Optional Features
Shape Memory Alloy (SMA)

Thermal actuator temperature set points*


Option:              A                           B

Fully Open:   > 18°C                   > 12°C

Closed:         < 12°C                   < 5°C

Mesh to resist vermin, insects and embersFor bush fire compliance the vent can be supplied with a stainless steel mesh of maximum aperture of 2 mm.
Air FilterNot fitted as standard
Manual OperationOpen / Closed / Auto
MaintenanceCover can be removed to clean the device.


Masonry Wall Install


*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.