Looking at a firefighting system for my 15m3 engine room and it is
looking like a choice between a HCF-227ea Halon type system, as he
http://www.fireandsafety.co.uk/automatic%20marine.htm

or Fire Pro - a compound - SBK - forming an aerosol that interferes
with the fire at the molecular level, as he
http://www.marinefiresafety.co.uk/firepro1.html.

HCF is just a gas and Fire Pro leaves a fine residue - my only real
concern is that the residue may not do electrical equipment and circuit
boards any good - but then the fire smoke may do the same amount of
damage.

Both are about the same price, and whilst not cheap at least prices
have halved over the last couple of years

Was also considering fitting a oil central heating type shut off valve
in the fuel line. Several types available - a simple handwheel valve
that shuts at 70C, a valve with a capilliary heat sensing tube and
probably the best a valve with a large spring to close and held open
with a meltable/fusible link. This could also be rigged so that the
valve could be easily tripped from the helm position, giving a manual
operation sometimes required.

All can be seen he http://www.bes.ltd.uk
Handwheel - item 10809
Capilliary sensing - 10810
Fire valve kit - 10815

Also, a 24v solenoid is also an option.

Any thoughts????
Thanks.