National boilers, radiators, and specialties: catalog no. 26 (1920)
National Radiator Company · National Radiator Company · leaf 81
Time Attachments for Thermostat Consists of reliable clocks mounted in connection with the Thermostat andof similar finish. The Time Attachment will change point of temperature control at anypre-determined hour. With the Time Attachment the pointer of thermostatmay be set to any lower degree and…
