Special Installations
3a.161Modular boilers.3a.162Portable boilers.3a.163Fired coil water heaters and instantaneous water heaters.3a.164Storage water heaters.3a.165Steam/hot water coil storage water heater.3a.166Miniature boilers and kitchen equipment.3a.167Hot water/steam heat exchangers.3a.168Autoclaves and quick opening vessels.3a.169Fuel trains and piping systems.3a.170Swimming pool heaters.3a.171Locomotive boilers.