Short gas hot water heaters are just one of the many options open to the householder who want so to take advantage of gas water heaters.
Gas provides an ideal fuel for the tankless hot water heater. It heats the water very quickly indeed, and is a straightforward and economical system to use.
In recent years the manufacturers of these gas units have done a great deal to improve the efficiency of these units so now you can easily obtain something rated at 90% efficiency rather than the sixty or so percent of a few years ago.
Interestingly, the reason that these boiler makers were perhaps a bit tardy in improving the efficiency of their products is probably that gas has always been a cost effective heating fuel. Tankless gas hot water heaters have always represented great value for money - they still do.
Of course, not everyone has natural gas, but luckily most of the units can quite easily be adapted to take liquid propane gas. This can be bought in canisters about three feet high, or delivered to a gas storage tank on your property. This makes gas fueled on demand water heaters a sensible option for many people.