The Honeywell TL8230A1003 is from the TL8230 series, operating as a 7 day programmable heat only thermostat. It is designed to operate on a convenient schedule system, and saves both money and energy.The Honeywell TL8230A1003 LineVoltPRO 8000 is a 7 day programmable heat only thermostat. It has the capability to maintain preset comfort levels on a highly advanced schedule system. It saves the user up to 20% in energy, and comes soundproofed for quiet operation. The digital thermostat is able to provide electronic control of 208/240 Vac resistive rated electric baseboard heaters, radiant ceiling heat, convectors and fan forced heaters. It saves up to 10% on annual heating costs and features an early start option for reaching the preset temperature by a designated time.