Fire Extinguisher Wholesaler?

[Dave Blackman]

Hi everyone - recently purchased several multi-family 8+ units and a commercial office space and insurance carrier says that fire extinguishers need to be installed throughout and inspected annually.  Does this typically mean I need to buy an extinguisher for each tenant to have in their unit or just in common spaces (stairwell, basement storage, etc)?

On that note, do you have any recommendations on good internet wholesalers of extinguishers and who you typically use to perform these annual inspections?

Many thanks in advance!