Hi Terry.
I was looking into the CO2 Extinguishers a few months back for around the house. The first thing I had to wrap my head around was the price. A 5-lb Amerex 322 was easily bumping along the $400 mark Cdn at most places but Amazon carries them for just under $300 Cdn with free Prime shipping.
The second issue I ran across was the sizing on them as you noted. It is a bit confusing. For example, the above noted Amerex 322 has dimensions of 8" W x 5" D x 18" H
The Width and Depth numbers threw me for a while until I realized the Depth refers to the actual cylinder diameter. The Width takes into consideration the nozzle sticks out on one side a bit and the trigger handle on top also is taken into consideration. The Height takes into account the handle assembly on top.
I suppose a third consideration is the proper use of the CO2 Extinguisher. A full on release of a 5-PDr will run about 10 seconds. Not a good plan of attack.
David
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