The Series SSB electric boilers are designed to produce clean steam up to 100 psig at rates from 36 lb/h to 540 lb/h. No flues, fuel lines or tanks are involved in their operation, and no onsite products of combustion are generated. They operate on electricity, can be located almost anywhere, and are compatible with distilled, demineralized, deionized, or reverse-osmosis-produced water. Small in size, they are quiet, provide high-quality steam, and are almost 100% efficient. Minimal heat is lost to the surrounding area.