Chapter 9 Overview

Although most offices use relatively limited quantities of heated water, it is not unusual for companies to waste money by heating water unnecessarily. Heating water at too high a temperature for office applications and having an oversized water heater are both common wasteful practices in office buildings. Like inefficient lighting and inefficient use of office equipment, inefficient and unnecessary use of water heaters releases waste heat that must be countered by increased cooling, resulting in additional wasted energy.

In office-based companies, the energy costs of heating water tend to be low relative to the costs of HVAC, lighting and office equipment. Typically, water heating


accounts for only 2% of energy consumption in office buildings in the U.S..1 However, a business case can likely be made for many of the measures outlined in this chapter, most of which are no-cost or low-cost. It is also important to note that companies often pay three times when they use heated water—with charges incurred for water use, energy and sewage disposal. Therefore, measures taken to reduce heated water use will net more than just energy savings.

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