SL 40-399 Natural Gas Condensing Wall Boiler

DHW opt out priority for multi boiler systems. | With 24 x 399 boilers turndown ratio is 240:1 = min. firing rate range is 40,000 Btu/h all the way up to 9.5 million Btu/h in 1000 Btu/h increments. | DDC Control 0-10 VDC or 4-20 mA without additional controls. | Up to 10 year commercial heat exchanger warranty. | Better efficiency 95% AFUE on the SL 26-260G3. | 96% Thermal efficiency on the SL 40-399G3 | Reverse flow detection. | Optional SL 40-399 316Ti Titanium enhanced heat exchanger available. | MFZ Technology: Patented moisture management system. Protects and ensures long life for all components in the boiler. | Now featuring multiple zone pump control – up to 4 zones. Replacing the need for external pump controls. | Touch Screen Boiler Controller: Express setup, Remote monitoring & diagnostics, Easy USB programmability, True native BACnet, Intuitive alert system, Simplified load pairing, Visible flame current. | Multi-boiler communication up to 9.5 million Btu/h (24 boilers) without additional controls. | PVC/CPVC/PPs approved – venting up to 400 feet.