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 LPCB Approval.

The above video was taken during the testing of the DM4R Nozzle at BRE GLOBAL.
Once the nozzle activates you can see the rapid reduction in the fire due to the suffocating effect of the mist (oxygen reduction). The coarser water particles are hitting the fire and surrounding wood directly and the finer mist gets to the parts of the fire that cannot be reached by direct line of sight of the nozzle. This is the Dualmist Method - using multiple ways to tackle the fire - not a single method. Due to how efficiently the nozzle operates, the fire is fully out after only 1 minute 40 seconds after the nozzle activates. 

The above video was taken at our in house test facility

It shows the engulfing effect of the Coarse mist and fine mist combination. Testing like this enables us to verify there are no coverage blanks spots.
The mist spread is as wide as possible and the top row of jets hit the walls high up in the room for maximum wall wetting effect. No fire can spread in a room covered with our superb DM4R

Our EDA system is truly remarkable and is surely the best possible way to protect any area with a high ceiling (7m). The Following Video was taken at BRE and it shows that using a double knock system of smoke detectors to activate the pumps means that we can activate much quicker than any bulb activated system. If a bulb system is used, the fire is generally too large to put out by the time the bulb activates. (which would be 6+ minutes). Our system activates in 1 minute 46 seconds and starts suppressing the fire much sooner. As a result the fire never really has a chance to take hold.