San Francisco : Architect and Engineer, Inc · leaf 8
: ZoN€ Control JOHNSON Automatic TemperatureRegulation Applied to Zone Control … Day and Night Thermostats, Clocks, and Switches may be ar-ranged in a wide variety of combinations for the control ofbranch heating mains serving various sections of the build-ing. Differential thermostats are available to maintain properrelationship between out-door and radiator…
Architecture · Building
Internet Archive · Public Domain Mark 1.0. Free to use for anything.
