- inharmonicity
- inherent
- inherent error
- inherent regulation
- inhibit-gate
- inhibited oil
- inhibition
- inhomogeneous
- initial chilling
- initial compressor
- initial condensation
- initial conditions
- initial current
- initial freezing
- initial measurement
- initial permeability
- initial position
- inching
- incidence
- inclined tube
- incoherent light
- incoherent waves
- incombustible slab
- incoming register
- incommensurable
- incomplete defrosting
- increment
- indeterminism
- indicator chart
- indistinct
- individual freezer
- indivisible
- indoor blower
- indoor temperature
- induced
- induced magnetism
- induced radiation
- induction pump
- inductive coupler
- inductive grounding
- inductive resistance
- inductive waveform
- industrial atmosphere
- industrial cooling
- inelastic impact
- inertialess
- inextensible string
- infiltrating air
- infiltration
- inflammable refrigerant
- infrared bolometer
- infrared heating
- infrared vidicon
- infrasonic wave
- initial state
- initial susceptibility
- initial time
- initial voltage
- initially cooled
- injected liquid
- injecting nozzle
- injection control
- injection humidifier
- ink recorder
- inleakage
- inlet area
- inlet chamber
- inlet conduit
- inlet fan
- inlet grille
- inlet pressure
- inlet slot
- inoculate
- instrument correction
- instrumentation
- insulated baffle
- insulated case
- insulated railcar
- insulated roof
- insulated surface
- insulated volume
- inscattered
- insensible
- insert earphone
- insert pattern
- insertion loss
- inside air
- inside thermostat
- installation
- instantaneous cooling
- instrument
- instrument shunt
- insufficient
- insufficient refrigerant
- insulant
- insulated bath
- insulated ceiling
- insulated compartment
- insulated design
- insulated enclosure