Several programmable units can accommodate different settings for every day of the week. Commercial Status Implementation Issues Sustainable Sources 1994-2000. Programmable Thermostat Legend Satisfactory Satisfactory in most conditions Satisfactory in Limited Conditions Unsatisfactory or Difficult Sustainable Sources 1994-1999. The buyer should choose one that's easy to operate and ask for a demonstration from the supplier, instead of relying solely on an instruction manual. Thermostats must be wired according to electrical code requirements.
Most thermostats are low voltage devices.
The thermostat should be located away from exceptionally warm or cool locations so that it can sense the normal temperature in the house. An automatic changeover between cooling and heating modes. Sensing of outdoor conditions so that recovery from a setback setting can occur in a timely manner. Manual program override. Operation on electricity with a battery backup to retain the programming during a power outage.