The FC401 air handler controller is specifically designed for hi rise forced air delivery systems, where circulating hot and chilled water is used for heating and cooling.
Replace your old 6.5 by 5.75 inch high voltage mechanical thermostat panel with a custom low voltage solid state design by R&D Electronics. All 120 Vac components are safe and UL™ listed.
The R&D Electronics model FC401 air handler controller makes it possible to conveniently locate a modern low voltage digital programmable thermostat on almost any nearby wall. Only a small length of low voltage wiring hidden behind the wall is necessary to connect the programmable thermostat (not shown).