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CTC Model 43054 Non-Programmable 1 Heat / 1 Cool Thermostat The Model 43054 Digital Electronic Thermostat provides the latest in non-programmable temperature control technology, yet is priced lower than many competitive mechanical models. Featuring filter change indication, assured system compatibility and INDIGLO night-light, the CTC Digital Electronic Thermostat offers solid performance and real value. Features: * Latching relay assures system compatibility * Electronic digital accuracy * Large LCD, easy-to-read display * No programming required * Soft Touch buttons * INDIGLO® night-light * Easy ìFront Loadî battery access * Filter change indicator * Low battery indicator * F° / C° selector * No leveling required * 3-year warranty * Powered by 2 AA batteries (included) * Decorative Wall Plate Included Compatibility: . 24 VAC heat/cool, heat only or cool only systems and single stage heat pumps . Gas, electric or oil systems . Millivolt systems . 2 wire hydronic systems (Not for use with 110V/220V systems) Specifications: * 20-30 VAC, 50/60 Hz * Current draws 0.1 to 1.5 amps * Temperature set range: 45°-95° F (7°-35° C) * Operating differential +/- 1° F * Compressor protection: 4 min. delay on break * Terminations: RC/O, RH/B, Y, W, G, R * Bi-metal freeze protection * 5" W X 4" H without wallplate / 5-5/8" W X 4-7/8" H with wallplate