by controlling refrigerant heaters

Full Title

Control or safety arrangements > Control systems characterised by their outputs; Constructional details thereof > for controlling the temperature of the supplied air > by controlling refrigerant heaters

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

HEATING; RANGES; VENTILATING

Subclass:

AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING