The DIN‑THSTAT is a DIN‑rail mountable heating, cooling, and relative‑humidity thermostat. The DIN‑THSTAT provides control of radiant floor heat, forced air, and heat pump HVAC systems. DIN rail mounting allows for installation in an equipment cabinet, keeping the living area free from a wall-mounted thermostat. Small, unobtrusive remote temperature and humidity sensors¹ gather the environmental conditions from the room and transmit the data to the DIN‑THSTAT.