It works because of its advanced aerodynamic design-
It is the only product of its type on the market (Natural Daylight/Ventilator) that can achieve 60l/sec exhaust at Sydney's average wind speed to meet the BCA -AS 1668.2 wet area performance requirement of 25l/sec extraction. The unit also has superior stack effect and buoyancy extraction due to its CFD analysed unobstructed flow path.
How it Works-
SeaBreezer
The SeaBreezer attic vent allows daylight and ventilation into the attic space helping to reduce condensation and keeps insulation dry and effective. This is achieved by utilising natural wind energy to extract moisture by creating negative pressure from the aerodynamic foil and causing extraction at the rear of the unit. This is a more efficient form of wind extraction than cowling vents. The unit also has improved stack and buoyancy characteristics due to its innovative design. It can operate in nil wind conditions as a solar chimney to provide high efficiencies over cowl vents. The SeaBreezer will continue to extract in appropriate nil wind conditions, unlike cowl vents that suffer from blockage and throat restrictions.
The SeaBreezer works 40% - 100% more efficiently than its competitors as concluded by University of Technology, Sydney test results. Click to review University testing results that show that the SeaBreezer even outperforms a larger 380 mm throat Whirly style vent fitted with a fan! COMPARATIVE ANALYSIS OF VENTILATORS PERFORMANCE.pdf
 
CFD Analysis-and Aerodynamics laboratory testing at the University of Technology, Sydney
WDSkyVent
The WD SkyVent is a revolutionary dual function tubular skylight and ventilator. It brings the functions of a tubular skylight and a ventilator into one low cost product. The one tubular skylight is ventilated by the advanced designed Wind Directional transparent dome that points into the wind and extracts air out of rooms inside the house. Ideal for bathrooms to remove hot moist air at the source. The WD SkyVent is a low cost method of reducing artificial lighting and associated heat. Ventilation is provided via its flexible tube connected to the aerofoil dome to remove moisture to the outside of the building envelope. By removing hot moist air at its source, condensation inside the house is dramatically reduced by ventilating the hot moist air to outside of the building envelope. The IAQ of the house will be greatly improved by reduced mould / mildew and associated dust mites and asthma issues associated with condensation.
The WD SkyVent works on stack effect as well as wind suction, allowing temperature and pressure to work for you, as hot less dense air rises it is replaced by cooler denser air. The advanced design works as a solar chimney so as soon as the sun warms the head of the unit and the attic space, the temperature flow starts to drive the warm air out. The smart design also allows continuous air flow from the adjustable diffuser, trickle ventilation or no ventilation by completely closing the diffuser - Truly and advanced system with the home owners comfort in mind! No wonder the WD SkyVent was shortlisted for the 2008 Australian International Design Award.
Performance
Performance will depend on several factors such as inlet capacity for supply of cooler denser replacement air and buoyancy / stack effect. Generally for condensation control in an attic space, one or two vents placed towards the ridge of the roof is sufficient. The WDV3000 works particularly well with stack effect and acts like a solar chimney. Extraction / exhaust without buoyancy has been measured at 3600 l/min @ 12km/hr- Sydney's average wind speed. For a bathroom of 3.5m x 2.5m x 2.4m = 20m3., which = 20,000 Litres of air. The SkyVent can achieve 10 Air Changes/ Hour (ACH)
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Dimensions
Dimensions of WDV3000 / Seabreezer: WDV3000 dimensions.pdf
Dimensions of diffuser for SkyVent / Ventalite:SkyVent tube and diffuser dimensions.pdf
Installation Instructions
SeaBreezer Tiled Roof Installation Instructions:- ESASeaBreezer Tiled Roof instructions NonCyc c.pdf
SeaBreezer Metal Roof Installation Instructions:-ESA SeaBreezer Metal Roof instructionsNon CycA.pdf
Pictorial metal roof installation instructions:-Fitting Instructions for a Metal Deck Roof pictorialA.pdf
Tips for installing the SkyVent lightpipe and difusser.Tips and tricks about installing the SkyVent Lightpipe.pdf
Cyclonic fixing details:Fixing for Cyclonic areas 005.jpg
Brochures
ESA Product Flyer A4 summary of SkyVents and SeaBreezer-ESA products pdf.pdf
ESA Brochure:- ESA Brochure2010.pdf
WDV3000 Brochure:- ESA WDV3000 brochure.pdf
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