Bock OT150N OptiTherm comm gas-fired, condensing, water heater. 99 gallon glass-lined steel tank (Non-ASME), 60-to-150 MBH modulating nat gas input, up to 99% efficient. 120/1 blower assby, T&P valve, brass drain valve, no anode rod required, 5-year tank/1-year parts warranty. Power/direct vents w/ PVC or CPVC (not included). # 55802 | B2B Storefront