The boilers can be combined in one cascade configuration. This ensures that the required power can always be achieved. Since several boilers are combined this allows for a deeper modulation range and for more precisely achieving the required level.

Furthermore, the cascade configuration offers an increased reliability: should one boiler go into error, the cascade configuration will continue to operate. Strebel Ltd can supply standard cascade systems with mounting frame, piping and low loss headers for up to six boilers depending on the range.

Larger numbers of boilers in a cascade combination are possible but require a dedicated system which must be designed separately. The software allows for combining of up to 16 S-CBX boilers in a single cascade installation.