Environmental Engineering Reference
In-Depth Information
h. Printers
i. Scanners
5. Water heaters
6. Lighting
a. Compact fluorescent light bulbs (CFLs)
7. Commercial food service
a. Commercial fryers
b. Commercial hot food holding cabinets
c. Commercial solid door refrigerators and freezers
d. Commercial steam cookers
e. Commercial ice machines
f. Commercial dishwashers
8. Other products
a. Battery charging systems
b. External power adapters
c. Vending machines
9.4 Energy Auditing
9.4.1 General
An energy audit is an inspection, survey and analysis [7] of energy flows for
energy conservation in a building, process or system to reduce the amount
of energy input into the system without negatively affecting the output(s).
When the object of study is an occupied building, reducing energy consump-
tion while maintaining or improving human comfort, health and safety is of
primary concern. Beyond identifying the sources of energy use, an energy
audit seeks to prioritise the energy uses according to the greatest to least
cost-effective opportunities for energy savings.
A home energy audit is a service where the energy efficiency of a house [7]
is evaluated by a person using professional equipment (such as blower doors
and infrared cameras) with the aim of suggesting the best ways to improve
energy efficiency in heating and cooling the house.
An energy audit of a home may involve recording information about vari-
ous characteristics of the building envelope including the walls, ceilings,
floors, doors, windows and skylights. For each of these components, the area
and resistance to heat flow (R-value) is measured or estimated. The leakage
