Introducing a new line of high-performance commercial gas water heaters from GSW John Wood. The John Wood Signature Series features a significantly lower profile, smaller vent diameters, and a new, ultra-accurate dual electronic thermostat for precision temperature control. These water heaters handle a wide range of applications that require inputs from 125,000 BTU to 399,000 BTU. The models meet or exceed ASHRAE 90.1 1999 energy efficiency standard and 80% thermal efficiency. ASME models are available in 199,000 to 399,000 BTU. Power vent kits, high altitude conversion kits and propane/gas conversion kits are available options.