Innovation built on experience

Ventient Trickle Breathe

Proctor Ventient Trickle Breathe (TB)

Glazed-in trickle vent

Product Description

The Ventient Trickle Breathe (TB) is precision manufactured aluminium glazed-in trickle vent that can be accommodated into a wide range of window frames.


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 TB 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 TB is installed into the glazing pocket of the frame, in accordance with the product installation guide.

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.

View from interior with cover option

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 TB could be an acceptable permanent natural ventilation opening as required in Clause 2.3.

View from exterior with cover option

Sample Specification

Install Proctor Ventient TB Trickle Vent with shape memory alloy passive temperature sensing flow control, in accordance with the user guide.

Device Length: ________mm (L2 from figure 1)

Optional features:  (from table 2)

Product Code: VENTIENT TB-11 / TB-22

Ventilation volume at ⊿P12Pa: (from PQ data)

Colour:  (from table 1)

Table 1 Performance 
Open area (A)7.2cm² – 108.0cm²
Effective open area (αA)

with Type A filter

1.7cm² – 57.9cm²
Air Tightness (JIS A 1516) when closed


A-4 (<20m³/hr.m² at 100Pa)


Water tightness (JIS A 1517)

when closed (no cover)

W-4 (350Pa)


Wind pressure (JIS A 1515)

When closed

S3 (1,600Pa)


Acoustic Ratings (JIS A4706)





Standard Sizes and Colours 

Minimum Length (L2) 216 mm
 Maximum Length (L2)1,400mm
Option to trim lengthAvailable as requested up to 100mm
Suitable for glazing units20mm

Product Code: VENTIENT-TB-22


Product Code: VENTIENT-TB-11

Manufacturing tolerance+ 1mm
Standard available colours for main unit in gloss or matt anodized finish.

Addition of unfinished interior and exterior covers enables the local window supplier to powder coat covers to match the frame.


Table 2 Optional Features
Shape Memory Alloy (SMA)Not available as standard
Mesh to resist vermin and Insects1.5mm wide aperture
Air filter (average arrestance)

– Type A

Manual Operation

– Closable

– Openable



Standard (Auto mode)

Intumescent fire barrierAvailable option with exterior cover
Additional acoustic attenuationAvailable option with interior and exterior covers
 Exterior coverAvailable
 Interior coverAvailable
 MaintenanceInterior covers can be removed from the interior to clean the device and filter.







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. Please refer to the PQ data sheet and product user guide.