Class Information
Number: 236/24
Name: Automatic temperature and humidity regulation > Closed fluid heaters > Combined thermostat and flow controlled > Two or more valves
Description: Devices in which the heating means, usually a gas-burner, is controlled by the combined action of a thermostat in the fluid heated and a flow-motor operated by the flow of the fluid heated, the thermostat and motor operating on separate valves.
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