Designed to cover the rear of in-ceiling and in-wall speakers, a fire and acoustic hood is a legal requirement for many new buildings. But whether legally required or not, we'd recommend them as a safety precaution. Using a fire and acoustic hood helps resist the spread of fire through the floors of a building and to reduce the transmission of noise to adjacent rooms and properties. It's a requirement for all speakers that are installed below any habitable rooms and escape routes.
The hoods maintain fire rating integrity of the ceiling to which they are fitted, thus enabling 30 minutes or 60 minutes of fire rating to be maintained. Tested at the UK Building Test Centre and complies with Part B and Part E of UK building regulations - reports are available on request.
When a speaker is installed into a ceiling or wall it can help transmit unwanted sound, potentially into another property, even when the speaker is not in use. Adding these hoods effectively restores the acoustic integrity of the ceiling or wall. When the speaker is in use it can also reduce the rear transmission of sound by around 10dB over the mid to high frequency range. Preventing the transmission of low (bass) frequencies is a specialist field and may require substantial additional treatment.
Main features:
- Legal requirement in many new builds
- Maintains integrity of the ceiling the speakers are fitted to
- Dramatically slow fire spread between floors
- Reduces rear transmission of sound by up to 10db
- Qi 80RF - for Qi 80R models
- Woven Glass Fabric: Thickness - 0.40mm, Weight/m² - 430 g/m²
- Warp count: 1360 d’tex
- Finish: Starch weave lock
Sponge Properties:
Physical form/appearance: Solid, voluminous material, more or less elastic.
Specific gravity: 10-600 kg/m³
Solubility in water: Insoluble
Odour: None or mild odour
Flash ignition point: Between 315ºc to 370ºc
Decomposition temperature: Above 180ºc
Thermal energy: 28 000 KJ/kg
Stability and reactivity: The product is stable at temperatures between -40c and +12ºc
Auto-ignition point: Between 370ºc to 427ºc (ASTM D 1929)
Test Details:
Complies with Part B and Part E UK building regulations
Integrity: Insulation
Trada FR 1739: 240 mins 46 mins
BTC 10891F: 88 mins N/A
External dimensions:
Dia. 320mm x 400mm, Depth 110mm
