Description
FTXL boilers have a top-mounted, micro-metal fiber burner, with a blower/gas valve assembly that drives heat energy downward, through stainless steel fire tubes, with exhaust venting through the bottom of the unit. With up to 10:1 modulation turn-down, the burner automatically changes its firing rate as building heat loads vary. An FTX1000 fires at its maximum 999,000 Btu/hr rate when heat load is highest, then gradually “turns down” to as low as 10% (99,900 Btu/hr) as load decreases. The M13 model features a GE GAP/FM/IRI-compliant firing control package, ideal for commercial applications requiring advanced safety and monitoring capabilities. A modulating system runs smoothly and efficiently, without frequent on/off cycling.
Features
- 97.2 Thermal Efficiency
- 7:1 Turndown Ratio
- Stainless Steel Fire Tube Heat Exchanger
- Featuring CON·X·US® Remote Connectivity and SMART TOUCH™ Operating Control
- Up to 100' Equivalent Vent Length
- 7” Touch Screen
- Flow Rates from 20 to 150 GPM
For light commercial applications, the FTXL™ brings models from 399,000 to 999,000 Btu/hr, and takes Lochinvar’s fire-tube technology to the next level.


