The system ensures smooth, quiet modulating combustion from as low as 5 percent of the maximum firing rate up to 100 percent as heating load increases. By matching the actual system demand, modulation reduces fuel bills, enhances long-term reliability, and provides optimal comfort for the customer.

The system’s built-in cascading sequencer allows up to eight CREST boilers to be sequenced using a simple two-wire, daisy-chain connection. Cascade sequencing can be programmed for lead-lag or efficiency optimized operation. The new CREST models also feature cascade redundancy, which provides peace of mind by helping to ensure that a multi-boiler system will always deliver reliable performance without downtime. If the lead boiler is turned off for maintenance, cascade redundancy automatically shifts the lead role to the second sequenced boiler. For more information, visit www.lochinvar.com.