Mike Lahi, vice president, Sales & Marketing, Lochinvar, discusses the new condensing boiler during a press conference at AHR Expo in Chicago.

CHICAGO — Lochinvar LLC introduced three new CREST condensing boiler models with 750,000 to 1 million and 1.25 million Btuh inputs during the AHR Expo on Tuesday.

Lochinvar’s patented Wave™ fire-tube design and advanced combustion technology features the new CREST boiler models which deliver 96.2 percent thermal efficiency and up to 20:1 modulation turndown. With the addition of the new models, the CREST line now includes 10 condensing commercial boilers with inputs ranging from 750,000 Btuh up to 5 million Btuh.

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.