Tankless water heaters require more BTU demand than regular storage tanks therefore it is recommended that you contact a qualified plumber to see if your gas line needs to be changed.
Please visit http://www.noritz.com to find an installer nearest to you.
See also installation manual at: http://support.noritz.com/technical-literature.php
British thermal unit, the amount of heat required to raise the temperature of 1 lb. of water 1°F
- Models: ALL MODELS