Lochinvar – FTXL™ Fire Tube Gas Boilers

Commercial Boilers

FTXL™ FIRE TUBE BOILERS

The FTXL boiler is the new 98% efficiency standard in fire tube technology, and it puts remote connectivity at your fingertips. The FTXL boiler also has a compact footprint of just 6.2 sq. ft.

  • Up to 10:1 Turndown Ratio
Model Number Input MBH Min Input MBH Max Thermal Efficiency Output MBH Net AHRI Rating MBH Turndown Flow (GPM) Min Flow (GPM) Max HEX Water Volume (GAL) A B C D Water Conn. Vent Size Air Inlet Gas Conn. Ship. Wt.
FTX400(N,L) 40 399.9 98.00% 392 341 10:1 10 105 13 30-1/2″ 27-1/2″ 10-1/4″ 17″ 2″ 4″ 4″ 1″ 478
FTX500(N,L) 50 500 97.70% 489 425 10:1 15 105 12 30-1/2″ 27-1/2″ 10-1/4″ 17″ 2″ 4″ 4″ 1″ 504
FTX600(N,L) 85 600 97.50% 585 509 7:1 15 105 12 30-1/2″ 27-1/2″ 10-1/4″ 17″ 2″ 4″ 4″ 1″ 504
FTX725(N,L) 103.5 725 97.20% 705 613 7:1 20 150 17 33″ 28-1/2″ 10-1/2″ 17-1/2″ 2-1/2″ 6″ 4″ 1″ 575
FTX850(N,L) 121.5 850 97.00% 825 717 7:1 25 150 16 33″ 28-1/2″ 10-1/2″ 17-1/2″ 2-1/2″ 6″ 4″ 1″ 604