H
- Half-life
- Halogen Lamp
- Halogenated Substances
- Hand Loading
- Haulage Cost
- Head
- Heap Leach Solutions
- Heat Content
- Heat Pump
- Heat Pump (Air Source)
- Heat Pump (Geothermal)
- Heat Pump Efficiency
- Heat Rate
- Heated Floorspace
- Heating Degree Days (HDD)
- Heating Equipment
- Heating Intensity
- Heating Stove Burning Wood, Coal, or Coke
- Heating Value
- Heating Value (Natural Gas)
- Heating, Ventilation, and Air Conditioning (HVAC)
- Heavy Gas Oil (HGO)
- Heavy Metals
- Heavy Rail
- Heavy Water
- Heavy-water-moderated Reactor
- Hedging
- Hedging Contracts
- Heliostat
- Henry Hub
- High Efficiency Ballast
- High Efficiency Lighting
- High Sulfur Diesel (HSD) Fuel
- High-Intensity Discharge (HID)
- High-intensity Discharge (HID) Lamp
- High-mileage Households
- High-Temperature Collector (HTC)
- High-Temperature Gas-cooled Reactor (HTGR)
- Higher Heating Value (HHV)
- Higher Heating Value (HHV)
- Highwall
- Hinshaw Pipeline
- Holding Company
- Holding Pond
- Horizontal Axis Wind Turbine (HAWT)
- Horizontal Directional Drilling (HDD)
- Horizontal Well
- Horsepower (HP)
- Host Government
- Hot Dry Rock (HDR)
- Hot Tub
- Hours Under Load
- Household
- Household Energy Expenditures
- Housing Unit
- Hub Height
- Humidifier
- Humidity
- HVAC Conservation Feature
- HVAC Demand-Side Management Program (HVAC DSM Program)
- Hybrid Electric Vehicle (HEV)
- Hybrid Transmission Line
- Hydraulic Fracturing
- Hydraulic Head
- Hydrocarbon
- Hydrocarbon Gas Liquids (HGL)
- Hydrochlorofluorocarbon (HCFC)
- Hydrochlorofluorocarbons (HCFCs)
- Hydrocracking
- Hydroelectric Power
- Hydrofluorocarbons (HFCs)
- Hydrofluorocarbons (HFCs)
- Hydrogen (H)
- Hydrogen (H2)
- Hydrogen Sulfide (H2S)
- Hydrotreating
- Hydroxyl Radical (OH)
- Hypothetical Resources (Coal)