NKV-TB
General Information
Description
The Bovema NKV-TB louvred ventilator is designed to provide an economic, non-powered method of ventilation, allowing the removal of large quantities of warm air and / or smoke.
The NKV-TB ventilator is specifically designed for installation into continuous circular section roof lights, where the unique circular section base profile of the louvre allows the ventilators to follow the curve of the rooflight.
Extruded aluminium blades ensure a product which matches the lines of the roof light construction. Each low profile ventilator is manufactured to NEN-EN-ISO 9002 quality control standards and is designed and tested to comply with various national standards for smoke ventilators such as BS: 7346: Pt 1: 1990 in the UK and DIN 18232 in Germany.
The construction is formed from high quality, corrosion resistant aluminium to ensure low maintenance, with various methods of operation, including pneumatic or electric, to provide for a wide range project applications.
Operating Principles
Warm air in a building rises due to thermal convection. Large quantities of warm air and / or smoke can be removed from a building using this natural ventilation principle. The system consumes no electrical power to extract the air and the ventilation effect may be increased by external wind action.
NKV-TB ventilators are used to provide daily ventilation and / or smoke and heat evacuation in case of fire. The operating systems may be enhanced by the addition of facilities such as rain or wind sensing systems, which ensure the building is protected even if the outside environmental conditions change.
As a high performance operable ventilator, the NKV-TB blades are fitted with weather resistant EPDM seals to form an airtight unit for maximum energy efficiency. A rainwater gutter at each blade junction sheds water to either side of the louvre box, for removal by an external drainage system. This ensures a waterproof internal construction at all times and all the louvre-operating mechanisms are contained within this protected area to minimise maintenance requirements.
The overall design, with extruded aluminium profiles plus high thermal or sound reduction performance makes this the ideal product for technically sensitive buildings.
Applications
Buildings with curved rooflight constructions where daily ventilation or smoke extract in the event of a fire is required:
- Atria;
- Shopping Centres;
- Offices;
- Sports Centres;
- Apartment Buildings;
- Hotels;
- Etc.
Specifications
Louvres:
- 6 mm single laminated, toughened or wired glass;
- 18/20/22 mm double glazed units;
- 10 mm clear or opal, twin wall polycarbonate;
- 16 mm clear or opal, twin wall polycarbonate;
- 1.8 mm single skin extruded aluminium;
- 10 mm thermal insulation, double skin aluminium;
- 16 mm thermal insulation, double skin aluminium;
- 20 mm thermal insulation, double skin aluminium.
Despatching
NKV-TB louvre ventilators are supplied fully assembled and each unit is test operated before despatch.
The standard unit is manufactured in natural mill finished aluminium but a Polyester Powder Paint finish to any available RAL colour from the Bovema range may be provided. Other optional items such as bird screens, insect mesh, sound attenuators, sprinkler shields and open / close location switches are also available.
The Louvre base units and fixing flanges are of fully welded construction with final flange sizes being fabricated to suit individual project requirements.
The lightweight construction and wide range of base profiles, allows the NKV-TB louvred ventilator to be installed onto almost any type of circular section roof construction.