When it comes to hot water the range of a.o smith waterheaters is particularly hard to beat. This is a company that has been making units since 1936. They make units for the home and for commercial situations, which has helped them build a reputation for quality that is trusted by many.
One thing AO Smith have done, as a demonstration of their commitment to customer service, is to make all the spec sheets and user manuals easily available via their web site. This is a nice little innovation that is surprisingly rare in the world of waterheaters.
When it comes to their range of waterheaters they offer a strong range including a compact tankless gas water heater designed for low to medium use (which can service a whole house if he owners are careful).
Besides the instant hot water heaters, AO Smith concentrate their efforts on innovative tanks, both gas and electric models. They offer a large range for all home sizes and pocketbook sizes. Their top of the range models in both gas and electric is called the The Conservationist - as the name suggests these units they offer best use of energy. They also offer a high output and are really worth a look if you are in the market for one of the new, environmentally friendly tanks.