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Parallel Plus Explained


Parallel Opening:  Review of Natural Ventilation  Testing to prove the theory…  Addressing new requirements  Parallel Plus – The Features  Dynamic Testing  Summary


Benefits of Natural Ventilation:  Occupancy Comfort  Reduced Carbon Footprint  Lower installation costs  Reduced maintenance costs  Smoke evacuation solutions  Freedom of architectural design


So Why Parallel?  Reflectivity  High carrying capacity  Provides occupant safety  Balanced ventilation


Ventilation Formats:  It has always been perceived that ventilation could be achieved through the use of different opening methods with varying degrees of effectiveness.


Proving it: BRE Testing  Test program commissioned at the Building Research Establishment (BRE) to evaluate the various façade opening styles.


Proving it: BRE test facility


Air Flow Analysis: Top Hung 

High air speed within the room

Low room temperature

High draft risk

100mm opening required to maintain ambient temperature


Air Flow Analysis: Top Hung Incoming fresh air enters at a relatively high air speed resulting in large temperature differences and consequently high draft risk


Air Flow Analysis: Bottom Hung 

Low air speed within room

In-effective air circulation

Low draft risk

110mm opening required to maintain ambient temperature


Air Flow Analysis: Bottom Hung Incoming fresh air moves downwards, mixing with the warmer room air resulting in low draft risk but minimal air exchange


Air Flow Analysis: Parallel 

Very low air speed within room

Effective air circulation

Low draft risk

40mm opening required to maintain ambient temperature


Air Flow Summary: Parallel ‘It is clear that a Parallel opening vent provides a good configuration for natural ventilation with unconstrained inlet and outlet flow paths’ Ref. BRE Report No. 239-111 August 2007.


Parallel Windows Must:    

Maintain parallelism Offer increased carrying capacity Incorporate low operating forces Provide proven endurance


Parallel Plus: the benefits New features provide consistent parallel operation


Parallel Plus: Manual Operation Design changes now allow vents up to 200 Kg to be operated manually negating the use for synchronised motors.


Parallel Plus: Resistance to Racking Un-affected by lateral wind speeds of up to 60 mph.


Parallel Plus: Resistance to Gust Loading Tested to withstand positive wind loads of 100mph.


Parallel Plus: Resistance to Gust Loading Tested to withstand negative wind loads of 100mph.


Parallel Opening: Endurance Securistyle Parallel Test Rig - Computer controlled Product tested in excess of 30,000 cycles. Operating forces recorded throughout the test.


Parallel Plus: The Complete Product  Manual Operation up to 200 Kg  Adjustability to maintain parallelism  Minimal opening to achieve adequate ventilation  Synchronised motor requirement no longer essential  International patent application filed


Thank you, any questions?

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