LAARS® newest natural gas commercial boiler and volume water heater conquers an incredible range of installations. Starting with a robust stainless steel, low pressure drop heat exchanger, NeoTherm® XTR delivers 96% thermal efficiency and a 10:1 turndown. Flexible system integration is another stand-out with Laars Linc® icon driven touch screen control and the ability to cascade up to 8 units. You’ll also appreciate tremendous versatility with up to 150 equivalent ft. of vent, a comment vent for multiple units, and more. NeoTherm® XTR is available in 399, 500, 650, 800, 999, and 1500 MBH sizes.