Posted By Jon H
Hi Elliot, this is from the governments fire safety risk assessment guide - available fro free download.
http://www.communities.g...ocuments/fire/pdf/151543

Section 3 - page 58

Where the fire risk is not confined to a
particular location, e.g. Class A fires, the fire
extinguishers should be positioned on escape
routes, close to the exit from the room or floor,
or the final exit from the building. Similarly,
where the particular fire risk is specifically
located, e.g. flammable liquids, the appropriate
fire extinguisher should be near to the hazard,
and located so that it can be safely used. They
should be placed on a dedicated stand or hung
on a wall at a convenient height so that
employees can easily lift them off (at about 1m
for larger extinguishers, 1.5m for smaller ones,
to the level of the handle). Ideally no one
should have to travel more than 30m to reach
a fire extinguisher. If there is a risk of malicious
use you may need to use alternative, and more
secure, locations.

Hope this helps.

Jon

Posted By Ashley Wood
The recommendation is 1000mm from floor to top of handle for water, foam, 5kg Co2 and 1400mm for Co2 -3kg.

However, as pointed out consider the ability of the user as they will have to lift the full weight to clear the bracket holding the extinguisher.