Manufactures the SRHP-AOV, SRHE-AOV, SRHGE-AOV, EXI-VENT and SDP-AOV smoke vent ranges at its Aldridge works, in bespoke as well as standard sizes. Units are CE marked as natural smoke and heat exhaust ventilators to BS EN 12101-2 under the Construction Products Regulation, and double as certified roof access hatches.