NKV-RT
General Information
Description
The Bovema NKV-RT louvre, with its weathered side ventilator sections, is designed to provide a high performance, non-powered method for the removal of large quantities of warm air and / or smoke.
This ventilator is particularly suitable for use in industrial or commercial buildings where thermal protection is important and high volumes of ventilation, with reduced weathered ventilation are required.
The extruded aluminium profiles to the louvre blades ensure the best possible visual appearance.
The high performance NKV-RT ventilator has an operable top louvre section, which provides large areas of opening for heat or smoke extract.
The blades are fitted with weather resistant EPDM seals to form an airtight unit when closed for energy conservation, and a rainwater gutter at each blade junction sheds water to either side of the louvre for external drainage. This is to ensure a waterproof internal construction. Side ventilators allow continuous weather protected ventilation at a reduced level.
The side ventilators are fitted with operable dampers to allow volume control, and two sizes of side ventilators are available to allow for the maximum ventilation capacity, or a lower profile unit as required to meet the Architects and Engineers requirements.
Each multi purpose ventilator is manufactured to NEN-EN-ISO 9002 quality standard control, and is designed and tested to various national standard for smoke ventilators, such as BS: 7346:Pt 1:1990 in the UK and DIN 18232 in Germany.
The construction is formed using high quality corrosion resistant aluminium to ensure low maintenance. Various methods of operation including pneumatic or electrical systems are available.
Operating Principles
Using the natural ventilation principle, the louvre section allows for the removal of large quantities of heat during hot summer conditions, from processes producing heat, from people or solar heat gains, particularly glazed roof constructions. The louvre section may also be opened to provide smoke extract in the event of a fire in the building. During bad weather or in the winter, solar heat gains may not present such a problem, but some reduced level of weather-protected ventilation may well be required for environmental purposes. Under these conditions the louvres would be closed and their high insulation levels will help to minimise condensation problems. The reduced level of ventilation required would be provided by the side ventilators which also have operable dampers to ensure full volume control is available at all times.
Applications
- Industrial buildings;
- Shopping malls;
- Multifunctional buildings;
- Swimming pools;
- Etc.
Specifications
Top louvre:
- 1.8 mm single skin aluminium;
- 10 mm thermal insulation, double skin aluminium;
- 20 mm thermal insulation, double skin aluminium;
- 6 mm single laminated, toughened or wired glass;
- 18 - 22 mm double glazed units (various constructions);
- 10 mm clear or opal, twin wall polycarbonate;
- 16 mm clear or opal, twin wall polycarbonate.
Side dampers:
- Single skin aluminium;
- Double skin aluminium, thermal insulation.
Frame / Housing:
- Single skin aluminium;
- Double skin aluminium, thermal insulation.
Despatching
The NKV-RT 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 supplied. Other optional items such as bird screens, insect mesh, sound attenuators, sprinkler shields and open / close location switches are also available.
The ventilator base units and fixing flanges are of fully welded construction and the lightweight construction allows the NKV-RT ventilator to be installed on any type of roof or rooflight construction.
The final flange sizes are manufactured to customer requirements, to allow simple Installation and ensure watertight building interface.