Ceiling vent with movable vane
Ceiling-embedded air conditioner
Centrifugal fan unit with vertical rotation axis
Clean room air system
Clean room ventilation system
Combination moisture elimination louver and air flow sensor and
Combustion air security vent
Combustion air wall vent
Compartment ventilating apparatus
Computer controlled air vent
Condensation preventing vent structure
Conical air filter
Conical air filter
Connection adapter for conduits and ventilation units
Construction element for a noise-suppression shed
Control apparatus for air conditioner
Control for dual stepper motors
Control of prime mover in HVAC distribution system
Control system for the ventilating means in a poultry building o
Controlling air quality