STADIUM VENTILATION BM720 Black Hole AntiDraught Telescopic Vent
Stadium Ventilation BM720 - ‘The Original Black Hole Ventilator' - "Black Hole" Anti-Draught Rectangular Ventilator complete with Rustic Red Double Air Brick, supplied in three telescopic parts to fit walls 290-390mm.
Benefits of the "Black Hole" range:
Stops wind blasting in - The air flow within the duct is slowed down by the change of direction and by the vortices formed, reducing draughts to a minimum.
Stops light showing through - The occupier cannot see through the ventilator and is less likely to be worried that insects and vermin may enter the house through it.
Stops light shining out - Night flying insects like moths, craneflies, and mosquitoes are not attracted in.
Absorbs outside noise - Reduces the penetration of traffic noise. The internal construction works as a sound baffle.
Allows air to be pulled through by the appliance when it is operating.
Safety - With draught and light annoyance problems eliminated, the occupier will not be tempted to block off the vent.
"Black Hole" ventilation products provide the answer to the dangerous practice of ventilators being blocked off by occupiers who are being annoyed by draughts. This makes an important contribution to safety. New tests show that while this works the ventilator may not pass the required amount of air when the appliance is operating. THEREFORE IT IS IMPORTANT THAT A SPILLAGE TEST IS CARRIED OUT AS REQUIRED BY THE BRITISH STANDARD.
"Black Hole Vario" Anti-Draught Ventilator BM720 features:
BM720 Ventilator includes:
Cavity Liner - black plastic, in two parts fixed together and with a continuous airway, centre joint with cavity drip and anti-draught baffles;
Slider Extension - black plastic, with 4 self-tapping screw holes to take the interior grille;
Inner grille - white plastic, 205mm x 290mm (8” x 11 1/2”), marked “DO NOT BLOCK THIS VENT & EFFECTIVE FREE AREA”;
Flush-fit double airbrick - rustic red plastic, 216mm x 152mm (9” x 6”).
Effective free area: 70cm².
For use with open flued appliances with an input rating up to: 21kW (71,500 Btu/h).
Invertible for high or low fitting.
Expands to fit solid or cavity walls from 290mm (11 1/2'') to 390mm (15 1/2'').
Complies with BS 5440 Part 2, 2000.
For more information, please visit this products specification webpage