Boilers

A boiler is a device for generating steam for power, processing, or heating purposes or for producing hot water for heating purposes or hot water supply. Heat from an external combustion source is transmitted to a working fluid contained within the tubes in the boiler shell. This fluid is delivered to an end-use at a desired pressure, temperature and quality. As you can imagine, boilers are used for very large, multi-purpose hot water applications.

While there are literally hundreds of models available, water heaters come in two basic styles:

Tank Style: This is the most common type of water heater. The tank size typically ranges from 40 gallons to 100 gallons depending on the hot water demand. Condensing hot water heaters are the most energy efficient and thus cost less to operate. In simplest terms, a condensing hot water heater recaptures the heat of the flue gases that normally just get vented out so less heat is lost out of the tank.

Tankless Style: These types of water heaters are becoming more and more popular because they take up less space and can cost less to operate. Unlike tank style water heaters that heat water in a storage tank, tankless water heaters heat water on the fly. When you turn on the hot water tap, a sensor tells the tankless water heater to fire up and starting heating water as it flows through the unit. That is why they are sometimes referred to as on-demand water heaters. When you turn off the hot water tap, the tankless hot water heater turns off as well. The advantage over tank style water heaters is that they are not continuously heating and reheating the same water. Water is only heated when it is needed, thus saving energy.

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