The Grozone TP1 Day / Night T° Controller is for controlling heating or cooling 55°F - 95°F (13°C - 35°C), for day and night.
The temperature differential is ± 2°F (± 1°C) and this unit has a maximum 120V load : 15A (resistive, ballast), 10A (tungsten), and a 1/2HP (motor, pump)