Energy Alternatives - Your Source for Environmentally Friendly Energy

Heliodyne DTT-84 differential controller

The Delta-T controller is a differential temperature thermostat designed specifically to regulate the operation of a solar heating system. UL listed, direct switching of up to 1/3 HP (10A) 115V AC. A DIP switch allows two precise settings for the ON/OFF differentials of either 18°F/5°F or 9°F/4°F. Options include recirculation freeze protection, shut off below 80°F, and high limit of 160°F or 180°F. Hardwire (230V) models or plug in (115V) models available.