The Johnston 358 series boiler is specifically manufactured for the state of Ohio with 358 square feet of heating surface. In the State of Ohio, boilers over 358 square feet of heating surface requires a licensed operator, and  boilers with under 358  square feet of heating surface does not  require a licensed operator. The Johnston 358 series meets all of these requirements…

The Johnston 3-pass boiler has large steam and water storage areas, high efficiencies, and the ability to meet wide load demands. The three pass design can be manufactured up to a 750 HP steam boiler. The 3-pass maximizes heat transfer while minimizing the use of refractory – no expensive door repairs. The 309 Series package…

Every Johnston 4-pass maximizes effective heat transfer using a full five square feet of heating surface per BHP, while at the same time eliminating tube sheet stresses and costly maintenance repairs that are common with dry backed designs.

In 1978, Johnston introduced the first single furnace waterback 4-pass Scotch Marine boiler. Water backed reliability with 4-pass design efficiency? A dream come true.

Many boiler users over the years have seen the benefits of using a Johnston boiler. Low maintenance costs, high reliability, high performance, and lower fuel costs have paid back their initial investment many times over.

Many boiler users over the years have seen the benefits of using a Johnston boiler. Low maintenance costs, high reliability, high performance, and lower fuel costs have paid back their initial investment many times over.

Many boiler users over the years have seen the benefits of using a Johnston boiler. Low maintenance costs, high reliability, high performance, and lower fuel costs have paid back their initial investment many times over.

Many boiler users over the years have seen the benefits of using a Johnston boiler. Low maintenance costs, high reliability, high performance, and lower fuel costs have paid back their initial investment many times over.