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Conventional storage, heat pump, tank-less coil, indirect and solar heaters are among the variety of water heaters available in the market. Consider the pros and cons of the different water heater models to help you select the one you'll be happy with. Efficiency, cost, capacity, and particular needs, if you have any, are some qualities you should look for.

About 20 to 80 gallons of hot water are stored by a typical tank heater. The water, which is heated up slowly, is stored for later use. Reheating at a pre-set temperature may need to be done, as water often loses heat, as it sits in the tank waiting to be used. A "standby heat loss" occurs as energy is lost from warmed water sitting unused in a tank.

As their name implies, tank-less heaters lack a holding tank. When you turn on a hot-water tap, the heating process begins. Either a gas burner or an electric element heats the cold water that travels through a pipe into the unit, quickly. According to Richard H. Karney, Energy Star program manager for the DOE, tank-less water heaters "do save energy because they eliminate parasitic energy losses in the tank.'

And it is because of their energy saving characteristic that a federal tax deduction is allowed on the purchase of some tank-less water heaters.

Bosch the manufacturers of water heaters produce a variety of tank-less heaters. They heat water faster; their maintenance is negligible, and unlike tank heaters, they save space, are easy to install and are available in a variety of sizes, and heating capacity, both in electric and gas models

The 250 series higher-end model enables you to access hot water from multiple faucets simultaneously. The 125 series is a single-faucet model providing access to one outlet.

Bosch Water Heaters are known to last from 0 to 20 years.

Bosch offers 24X7 telephonic support. A wide network of dealership insures easy access to repairers. Bosch water heaters come with a ten year warranty on the main unit, and a one year warranty on other parts.

The gas lines and vents needed to run your tank-less heater must be considered, before you select a heater to buy, as well as the costs associated with conversion. The servicing needs, the availability of replacement parts and technicians to service it are the other things you should take into account before you buy your water heater.