Our Products
Buy this sewer/toilet vent, 325mm across the vanes to fit a 110mm pipe. This product…Read moreR1,000.00 Excl Vat
Add the grid and flange set for 240mm roof whirly…Read moreR269.57 Excl Vat
This sewer/toilet vent is 325mm across the vanes and is…Read moreR1,000.00 Excl Vat
Buy a 240mm roof mounted wind turbine ventilator (commonly referred to…Read moreR1,156.53 Excl Vat
Choose the 500mm roof whirly roof mounted wind turbine ventilator (commonly…Read moreR2,417.39 Excl Vat
…Read moreR1,408.70 Excl Vat
This sewer / toilet vent 250mm diameter across the vanes and is…Read moreR550.00 Excl Vat
This sewer / toilet vent 250mm diameter across the vanes and is…Read moreR550.00 Excl Vat
The 500mm RoofWhirly4Africa trim ring finishes the installation of your…Read moreR252.17 Excl Vat
Our 240mm container vent is a roof mounted wind turbine…Read moreR1,086.96 Excl Vat- This sewer / toilet vent 250mm diameter across the vanes and is…Read moreR550.00 Excl Vat
Roof vents (also known as whirybirds or whirlybird vents) take advantage of wind and buoyancy to drive fresh air through a building. This natural air ventilation system removes the need for energy-intensive air handling units (air conditioners)– which can be expensive in terms of installation, energy use and maintenance.
“Good ventilation is a key element in maintaining a healthy environment for people within the confines of a building. Failure to provide adequate ventilation in a building can result in problems with moisture, unpleasant smell, lack of oxygen, and unacceptable content of poisons gases such as CO which cause medical conditions. Contaminants (such as formaldehyde or radon) can also accumulate in poorly ventilated buildings and homes, causing health problems.”
Wind Driven Ventilation for Enhanced Indoor Air Quality Jason Lien and N.A. Ahmed School of Mechanical and Manufacturing Engineering University of New South Wales, Kensington, NSW 2052, Australia.
ISSN: 2278 – 909X International Journal of Advanced Research in Electronics and Communication Engineering (IJARECE) Volume 5, Issue
The mechanics of air movement is very simple. The hot air inside the building tends to rise up. When the turbines rotate, they suck the warm air out through the vent, thereby, bringing out a drop in temperature in the building and allow the supply of fresh air through vents, doors and windows.
A turbine ventilator provides a form of natural ventilation, moving air continually and causing trapped, stale air to be replaced with cleaner, cool air from outside. The turbine is a free-spinning roof ventilator, which uses a combination of wind energy and convection to facilitate air changes.
Due to the fact that they are located at the highest point of the roof, they provide optimum ventilation.
When there is even the lightest of breezes outside - The extremely well designed RoofWhirlys4Africa turbine ventilators take advantage of a breeze / wind to draw air out of the building through the throat of the ventilator. Even the lightest of breezes drives the ventilator and ventilates the building in two ways:-
- as the breeze turns the ventilator, it creates an area of low pressure on the leeward side of the turbine. This low pressure zone is fed by drawing air from inside the building through the turbine, causing a continuous extraction of stale hot air from the building; and
- as the turbine rotates, the centripetal forces associated with the rotation fling air outwards to the tips of the vanes. This draws air from the building through the throat of the ventilator causing continuous ventilation.
When your building is hot and there is no breeze - An important feature of the RoofWhirly4Africa turbine is it will run even when there is no wind. When thermal currents develop within the building this will cause the ventilator to rotate drawing hot stale air out of the building and creating continuous ventilation.
RoofWhirlys4Africa roof top ventilators have several advantages. These include they do not need to be powered by electricity, they are located such that they exhaust the hottest air first, they do not cause any harm what so ever to the environment, they tend to save a lot of money because there is no operating cost plus they are maintenance free.
They also have to be strong and anti-corrosive. As they are installed on the top of the roof and come in contact with rain and birds the ventilators are made to be rainwater and bird proof. The ventilators are also designed in a way that prevents leakage and down draft into the building allowing air entry from the side openings. Ultimately wind turbine ventilators are pleasant looking, and tend to enhance the architectural looks of the building.
