England · South West · fire protection
Smoke vents in Westbury (Wiltshire)
Westbury (Wiltshire) (South West, England) has a published usual-resident population of 18,057 in 2019. Source: ONS towns 2019. That figure is residents, not a count of blocks with smoke vents. Coastal classification: Smaller non-coastal towns. ONS records population change of 34% between 2001 and 2019 for this built-up area. Classification on that source: Small. Workplace profile in the ONS towns file: Residential. Deprivation band on the same file: Middle Deprivation.
Natural vents and fans are different machines
A chain actuator on a stair window is a natural ventilator, usually talked about under BS EN 12101-2. A car-park or basement extract fan is powered smoke control, usually BS EN 12101-3. We will not price one as the other. The phone call has to establish which machine is actually on the building.
The fire-alarm contact is a named input
Most stair vents should open from a volt-free contact the cause-and-effect describes, often fire in the stair or a lobby, not “any device in the building”. We test the input the drawing names. After an alarm-panel change, that relay is the first thing that goes missing.
Automatic opening vents are life-safety smoke control, so this sits with fire protection and is quoted across the UK. Population figures are the published resident counts named above. They are not a survey of vents in Westbury (Wiltshire).
