Ask yourself: what is the likelihood of fire occuring within the freezer? If it does, how quickly will the available oxygen be consumed? How likely is fire to occur when anybody is actually in the freezer? How likely is it will they need the extingusher to aid their escape? (assume any smoke damage will result in total loss of the contents). Then as yourself: is my extinguisher provider competent to advise or merely looking to make additional sales?

Thanks for the answers, More sales was my thought This is a new build so Fire risk assessment is on its way, i think a fire in a freezer would be unlikely, Think i will get some more advice from elsewhere

If the freezer operates at -25deg C - I assume the sprinkler system is dry, until activated, within the freezer itself? Frozen up sprinkler pipes are much use. Or a suitable anti freeze is used. I assume that its is food products being stored in the freezer? It doesn't necessarily follow that just because its a freezer, that a fire is unlikely. Although, obviously ice will be liquified to water if the frozed products contain ice and will help to suppress a fire. Things still burn when cold! This seems like a sales ploy to flog more fire extinguishers Although, if a fire has broken out, it would be a secondary problem - letting off a Co2 bottle in possible the confined volume of a freezer could lead to an asphyiating atmosphere.