where the difference between the measured temperature and a set temperature is kept under a predetermined value

Full Title

Control of fluid heaters > characterised by the purpose of the control > Supplying heated water with desired temperature or desired range of temperature > where the difference between the measured temperature and a set temperature is kept under a predetermined value

Classification Context

Section:

MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING

Class:

HEATING; RANGES; VENTILATING

Subclass:

FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL