Stadium BM720 Anti-Draught Black Hole® Airbrick Ventilator – 70cm² | 21kW | Solid & Cavity Walls | Rustic Red
Stadium BM720 black hole® anti-draught Airbrick Ventilator. 70cm² free area. 21kw nett rated input. two-part cavity liner with Central Joint and cavity drip - variable between 290mm and 390mm for both solid and cavity wall construction. Reversable for either high or low-level installation. Rustic Red Airbrick. White internal grille with screw caps. Light and Noise Blocking. Airbrick dimensions - 216 x 152mm. Grille dimensions - 290 x 200mm.
The BM720 is the larger liner version of stadium's black hole® airbrick range - the BM701-3 uses a three part liner (230–375mm), primarily for cavity wall Installations whereas the BM720 has a two part liner with Central Joint and cavity drip, variable between 290mm and 390mm for both solid and cavity wall types. The cavity drip aspect will manage moisture inside the liner thereby eliminating the possibility of damp entering into the building via the liner. Due to its reversibility the BM720 airbrick can be installed at either high or low levels using one unit. The white internal grille contains screw caps for an internally flushed appearance.
Key Features & Benefits
Black Hole® Anti-Draught Technology - Internal vortices slow incoming airflow - significantly reduces draughts versus standard straight-through airbrick ventilators.
70cm² Free Area - 21kW Net Rated - For combustion air supply to appliances up to 21kW. Lower rated than the BM701-3 (100cm²/27kW) - verify your appliance requirement before selecting.
Two-Part Liner with Central Joint and Cavity Drip - Suitable for solid and cavity walls. The cavity drip manages moisture and reduces damp ingress through the liner.
290mm to 390mm Adjustable - Wider range than the BM701-3 (230–375mm) and covers thicker solid walls.
Reversible - High or Low Level - Single product covers both installation positions.
Light and Noise Blocking - Black Hole® design prevents light passage and absorbs external noise.
Rustic Red Airbrick - 216 × 152mm, matches standard UK brickwork.
White Inner Grille with Screw Covers - 290 × 200mm, flush internal finish.
Ideal For
Combustion air supply for gas fires and solid fuel appliances up to 21kW
Solid wall constructions (as well as cavity) where the two-part liner suits the wall build-up
Installations requiring reversible high or low-level fitting from a single product
Replacing a standard airbrick in a solid or cavity wall with Black Hole® anti-draught performance
BM720 (this product) - 70cm², 21kW. Two-part liner with cavity drip, 290–390mm. For solid and cavity walls. Reversible high/low level. Lower free area - confirm appliance ventilation requirement before ordering.
Black Hole® anti-draught airbrick for solid and cavity walls - 70cm², 21kW, reversible high/low level. Buy today.
Specification
Stadium BM720 Anti-Draught Black Hole® Airbrick Ventilator - 70cm² Specification
Manufacturer
Stadium
Model
BM720
Product Type
Anti-Draught Black Hole® Airbrick Ventilator
Free Area
70 cm²
Rated Input
21 kW net (71,500 BTU/h)
Wall Thickness Range
290mm – 390mm
Liner Type
Two-part with central joint and cavity drip
Suitable Walls
Solid and cavity walls
Installation Level
Reversible – high or low level
Airbrick Dimensions
216 × 152mm
Internal Grille Dimensions
290 × 200mm
External Finish
Rustic red
Internal Finish
White with screw covers
Suitable Applications
Combustion air supply for gas fires and solid fuel appliances – solid and cavity walls
Features
Stadium BM720 Anti-Draught Black Hole® Airbrick Ventilator - 70cm² Features
Black Hole® Anti-Draught Technology - Internal vortices slow incoming airflow - significantly reduces draughts versus standard straight-through airbrick ventilators.
70cm² Free Area - 21kW Net Rated - For combustion air supply to appliances up to 21kW. Lower rated than the BM701-3 (100cm²/27kW) - verify your appliance requirement before selecting.
Two-Part Liner with Central Joint and Cavity Drip - Suitable for solid and cavity walls. The cavity drip manages moisture and reduces damp ingress through the liner.
290mm to 390mm Adjustable - Wider range than the BM701-3 (230–375mm) and covers thicker solid walls.
Reversible - High or Low Level - Single product covers both installation positions.
Light and Noise Blocking - Black Hole® design prevents light passage and absorbs external noise.
Rustic Red Airbrick - 216 × 152mm, matches standard UK brickwork.
White Inner Grille with Screw Covers - 290 × 200mm, flush internal finish.
Questions
Reviews
Stadium BM720 Anti-Draught Black Hole® Airbrick Ventilator - 70cm² Reviews
