- heat up
- heat-accumulation
- heated air
- heated pan
- heated surface
- heater
- heater current
- heater fan
- heater gasket
- heater mat
- hazardous refrigerant
- hazy sun
- hearing
- hearing correction
- hearing test
- heart
- heart wheel
- hearth
- heat
- heat abstractor
- heat conductor
- heat consumption
- heat dehydration
- heat diffusion
- heat dissipater
- heat dissipation
- heat distribution
- heat emission
- heating appliance
- heating belt
- heating blanket
- heating blowpipe
- heating circuit
- heating coil
- heating conditions
- heating conduit
- heating control
- heating effect
- heating element
- heating garment
- heating grid
- heating inductor
- heating medium
- heating network
- heating operation
- heating requirements
- heating resistor
- heating section
- heating spread
- heating steam
- heating surface
- heating tariff
- heating zone
- heatsink
- heatsink surface
- Heaviside step
- heavy damping
- heavy electron
- heavy hydride
- heavy hydrocarbon
- heavy hydrogen
- heavy-meson
- heliacal
- heliacal potentiometer
- heliacal resonator
- helical coil
- helicity
- heliocentric theory
- heliograph
- heliacal coil
- heliacal fin
- heliacal winding
- heliocentric system
- helipot
- helium bath
- helium compressor
- helium cryostal
- helium cryostat
- helium evaporator
- helium extraction
- helium film
- helium liquefaction
- helium liquefier
- helium refrigeration
- helium refrigerator
- Helmholtz coils
- Helmholtz-Thevenin
- hemicycle
- hemihedral form
- heptagon
- hermaphroditic connector
- hermetic chiller
- hermetic circuit
- hermetic drive
- hermetic reciprocating
- hermetic refrigerator
- Hertz effect
- hertzian
- hertzian wave
- heterodyne