There are two classifications of commercial gas water heaters.
Standard water heater.
American standard waterheaters recognized throughout the world.
High efficiency he water heaters and standard atmospheric water heaters.
American standard the name recognized throughout the world of quality built products is also the trusted name that large residential commercial property owners managers plumbing contractors depend on for reliable energy efficient gas and electric water heaters.
Tank water heaters range from 20 to 80 gallon capacities.
Natural gas water heaters gas tank water heaters come in short and tall styles across a range of btus capacities and venting options.
Standard residential tank water heaters can range in size and capacity.
There are two main types of residential water heater technology.
Doe finalized the current standards for residential water heaters in april 2010 and they took effect in april 2015.
Storage and instantaneous water heaters.
Gas water heaters can heat the water to set temperature about twice as fast as electric heaters do and cost about half as much to run as an electric unit.
American standard 10 0 gpm residential ultra low knox high efficiency condensing natural gas tankless water heater with 180 000 btu input model tcwh180s as 5.
That s how much hot water you get from your water heater in its first hour of operation.