The VAX (Venturi Air eXtraction) unit enable the natural cooling and natural ventilation without the use of energy unless necessary. The unit is in two parts - a roof VAX unit and an apartment VAX unit. The two units are linked with air-shafts through the building.
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The VAX roof unit. The unit draws air from the building using wind to generate negative pressure using the Venturi-effect and by creating buoyancy in its plenum chamber. |
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The VAX apartment unit draws warm air out of the apartment during warm summer nights allowing the apartment fabric to cool for comfortable daytime and night-time use. External and internal sensors detect when the system should open and close. |
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The VAX unit contains an fan so that natural ventilation can by fan-assisted when required. In extreme circumstances during hot summer weather, cool air can be introduced into the system using air-conditioning. During winter months the system closes to maintain heating efficiency. |
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The roof-top VAX unit and apartment VAX units are linked with air ducts. |
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The VAX unit at the experimental house in the UK. |
