STADIUM VENTILATION BM725 Black Hole CoreDrill Telescopic Vent

£23.72 inc. of VAT

£19.77 ex. of VAT

£31.75 RRP

25% Saving

MPN: 535 20 015


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Stadium Ventilation BM725 - "Black Hole" Core Drill Ventilator complete with Brown Air Blast Cowl to fit walls up to 585mm thick (extended).
Core Drill Ventilators are designed for use when ventilating a gas appliance, but can also be used for general through wall ventilation. They can easily be fitted in both refurbishment and new build situations with the use of a Ø 5" (127mm) diameter core drill.
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
Core Drill "Black Hole" Ventilator BM725 features:
BM725 Ventilator includes:
"Black Hole" cavity liner - black plastic tube, in two parts fixed together and with a continuous airway, with fixed anti-draught baffles, length: 228mm (9''), diameter: Ø 127mm (5“);
Extension tube - black plastic, to extend out to 585mm;
Inner grille - white plastic, marked with “DO NOT BLOCK THIS VENT & EFFECTIVE FREE AREA”;
Air blast exterior cowl - brown plastic.
Effective free area: 30cm².
For use with open flued appliances with an input rating up to 13kW (44,000 Btu/h).
Expands to fit solid or cavity walls from 228mm (9'') to 585mm (23'').
Complies with BS 5440 Part 2, 2000.
For more information, please visit this products specification webpage .