Fire Extinguisher: Installation Zones

If the extinguisher is 40 lbs or less, install it so the top of the canister is no more than 5 ft above the floor. If it is more than 40 lbs, install it so the top of it is no more than 3.5 ft above the floor. Also, the bottom of an extinguisher must be at least 4 in from the floor. This requirement stops you from placing an extinguisher on a floor as a permanent spot for it.