The Lochinvar FTX600N is a commercial fire-tube boiler from the FTXL series with 600 MBH input and 97.5% thermal efficiency. It supports direct venting or room-air venting with PVC, CPVC, polypropylene or stainless steel pipe and includes SMART SYSTEM controls with optional remote connectivity. The unit features low pressure drop for variable primary flow piping, cascade capability for up to eight boilers, and a compact footprint with zero side clearance.

• Input: 85-600 MBH, thermal efficiency 97.5%
• Output: 585 MBH gross, 509 MBH net AHRI
• 7:1 turndown ratio, variable flow 15-105 GPM
• Heat exchanger water volume: 12 gallons
• Venting: 4" vent, 4" air intake, 1" gas connection
• Shipping weight: 470 lbs, dimensions 30.5" x 27.5" x 46.25"