Smooth-running, Modulating Combustion
For residential and light commercial applications, the Knight FTXL floor-mount commercial water boiler takes Lochinvar's fire-tube technology to the next level. FTXL offers best-in-class AHRI Thermal Efficiency and footprints, plus remote connectivity that puts the Smart Touch control at your fingertips, anywhere!
Knight FTXL water 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. The boiler fires at its maximum 999K BTU/hr rate when heat load is highest, then gradually "turns down" to as low as 10% minimum as load decreases. A modulating system runs smoothly and efficiently, without frequent on/off cycling.
FTXL can operate over a wide range of flow rates with very low pressure drop. This permits installation of a "full flow" (variable primary) system, eliminating the time and materials cost of primary/secondary piping, and pumps needed to maintain flow in a water-tube boiler. Variable flow also makes FTXL more flexible at handling frequent fluctuations in the system flow rate. The water boiler requires minimum supply pressure to operate, resulting in steady operation even in low gas pressure systems.
- Input: 999,000 BTU
- 98% Thermal efficiency
- Modulating burner with 10:1 turndown ratio
- Flow rate: 30 (min) -150 (max) gpm
- Smart Touch Controls with CON-X-US remote connect
- Reduce installation cost with variable flow technology
- Minimum supply pressure, installer-friendly
- 7" Smart Touch touchscreen operating control with built-in CON-X-US remote connect
- Stainless steel fire tube heat exchanger
- Combustion air filter extends time between cleanings
- Cascading sequencer with built-in redundancy
- Reduces installation cost with variable flow technology
- 10-year limited warranty
