Boiler and machinery had its beginnings in 1866 as an sideline to boiler inspection services. The first intensive application of loss control to avoid accidents rather than to simply pay for the consequences of accidents when they occur.

Three different boiler and machinery policies can be written.

The standard boiler and machinery policy, with a complete choice of "objects" to be insured.

Small business form may be used to cover boilers and pressure vessels, with or without air conditioners and air compressors, for eligible risks with total property value of $5 million or less.

Small business "broad" form covers a broader range of objects, including electrical and refrigeration equipment for a broader group of eligible risks with the same level of property values of $5 million or less.