The new tekmarNet touchscreen Thermostat 557 operates water-to-air or air-to-air heat pumps together with radiant floor heating. A backup heat source is available when the heat pump is off. When used with the tN2 House Control, radiant floor and two-pipe fan coils provide both heating and cooling. Humidity is measured, displayed and controlled.
tekmar Controls. www.tekmarcontrols.com/products/zoning/557.html