The DM range of Watermist Nozzles has been fully fire tested by the Building Research Establishment.
BRE GLOBAL at Watford, UK.

Dualmist can supply Nozzles to the commercial standard BS 8489 and the published BS 8458 for residential and domestic applications among others.  Significantly, the DM4R and DM4C Nozzles have now been accredited with full LPCB Approval.

The Importance of certification cannot be understated - please see video from the IFSA below