Distinctive Merit

ZoneTherm: A Home Heating System Controller
The 3687-based ZoneTherm was designed to allow experimentation with a home HVAC system in order to determine comfortable temperature levels. Interestingly, the low-cost system can be used to experiment with software and hardware applications to test different options. Thermistor inputs for temperature measurement and PWM outputs for controlling duct actuators are included. For convenience, the ZoneTherm can be retrofit into existing home heating systems. With a few low-cost mechanical additions, the system provides basic thermostat functions, multiple zones (i.e., measures and controls multiple zones independently), and active airflow control. Air flowing through up to five ducts can be controlled.

Bill Wittig and Ed Nixon
U.S.
bill@wwittig.com

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