A telescopic letter box system range specially designed to increase the safety and security of occupants against Fire, Smoke and Noise Pollution. Particularly suitable for multiple occupancy residential buildings.
The range includes models which are either fire & smoke rated from 30 minutes to 1 hour
The FSA telescopic letter box also carries an Acoustic Rating to 29db/Rw sound reduction criteria as outlined in Approved Document E for door sets. Tested to BS EN SO 140 it achieved better results than the standardised filly caulked benchmark test.
30 minute version available in polished silver or gold anodised aluminium
60 minute version available in brushed and polished stainless steel, polished brass
Fire, Smoke & Acoustic in one system
Other sizes available for 30 minute Fire / Smoke rated or Fire / Smoke & Acoustic rated are
47-52 mm & 52mm-57mm in either SA or GA finish
Other sizes available for 60 minute Fire rated or Fire/smoke & Acoustic rated are
42-47 mm & 47mm-52mm in either SS, MPS or PB finish
Optional security features for 60 Minute versions are an internal Security Cowl & Latch