Energy Glossary

A
Active Solar
Actual Demand
Annual Fuel Utilization Efficiency (AFUE)

B
Batts
Blankets
British Thermal Unit (BTU)

C
C.O.P.
Caulking
Cooling Ton

D
Degree Day
Demand Charge
Duct

E
EER
Electronic Funds Transfer (EFT)
Energy
Energy Lifestyle

F
Foot-candle
Fuel
Fuel Adjustment Charge (FAC)
Fuel Cost Recovery (FCR)

H
Heat Exchanger
Heat Gain
Heat Loss
Heat Pump
Heat Pump Water Heater
Heat Recovery Unit
Heat Transfer
Heating Seasoned Performance Factor (HSPF)

I
Illuminating Engineering Society of North America (IENSA)
Infiltration

K
Kilowatt (kW)
Kilowatt Hour (kWh)
kVAR Charges (Reactive Power Charges)

L
Light Loss Factor
Load-shifting
Lumen

M
Meter Constant
Minimum, Maximum and Average Foot-candles

O
Occupancy Sensor
Off-Grade
Off-Peak
On-Grade
On-Peak

P
Passive Solar
Peak Demand

R
R-Value
Ratchet Charges
Reactive Power Charges (kVAR)
Real-Time Pricing (RTP)
Refrigerant
Retrofit

S
Seasonal Energy Efficiency Ration (SEER)
Space Conditioning
Summary Billing

T
Therm
Thermal
Thermal Envelope
Time of Use (TOU) Rates

U
Uniformity

V
Vapor Barrier
Vent
Ventilation
Volt

W
Watt
Weather-stripping

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