N.H. Code Admin. R. Lab 1201.03
“Hot Water heater” as used in RSA 157-A: 6, III (g), RSA 157-A: 6, III IV and RSA 157-A: 8, II (c) means a vessel in which potable water is heated by the combustion of fuel, by electricity, or by and other source, and withdrawn for external use.
Source. #11071, eff 4-11-16