16 Terms
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Energy efficiency
Industry: Energy
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Energy efficiency
Storage water heater
Energy; Energy efficiency
A water heater that releases hot water from the top of the tank when a hot water tap is opened. To replace that hot water, cold water enters the bottom of the tank to ensure a full tank.
Tankless water heater
Energy; Energy efficiency
A water heater that heats water before it is directly distributed for end use as required; a demand water heater.
Flow restrictor
Energy; Energy efficiency
A water and energy conserving device that limits the amount of water that a faucet or shower head can deliver.
Mixing valve
Energy; Energy efficiency
A valve operated by a thermostat that can be installed in solar water heating systems to mix cold water with water from the collector loop to maintain a safe water temperature.
Cooling degree day
Energy; Energy efficiency
A value used to estimate interior air cooling requirements (load) calculated as the number of degrees per day (over a specified period) that the daily average temperature is above 65 degrees ...
Coefficient of heat transmission (U-value)
Energy; Energy efficiency
A value that describes the ability of a material to conduct heat. The number of Btu that flow through 1 square foot of material, in one hour. It is the reciprocal of the R-Value (U-Value = ...
Loss of load probability (LOLP)
Energy; Energy efficiency
A measure of the probability that a system demand will exceed capacity during a given period; often expressed as the estimated number of days over a long period, frequently 10 years or the life of ...
