The new State Sandblaster SBX commercial gas water heater combines State's Self-Cleaning design with an advanced fan-assisted combustion system for low nitrous oxide emissions. The State "Green Choice" design utilizing fan-assisted sealed combustion, along with low-NOx gas burners, eliminates the effects of negative air pressure that can seriously impair water heater performance in commercial applications. Eight SBX models are available with storage/input combinations ranging from 75 gal/120,000 Btu to 100 gal/260,000 Btu. With 83% thermal efficiency, Sandblaster SBX models deliver more hot water per hour than standard atmospheric commercial gas water heaters of comparable size. State Water Heaters.