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• Extra hour button for 1–3 hours of heating or hot water boost. • Fully compliant with Building Regs Part L1 (England & Wales) and Part J (Scotland).
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Extra hour facility for up to 3 hours boost or program extension. All ST9100 models incorporate the Line of Text (LoT¢) display that gives clear plain English instructions whenever any button or slider is used.
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Used for around 6 months but in good working order.
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Extra hour facility. ST6300A, ST6200A, ST6400A, ST6450B, ST6400C, ST9400A, ST9400C.
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The Honeywell ST9100C 7 Day Single Channel Thermostat Programmer is a reliable and efficient heating control system for central heating radiators. With its programmable 7-day schedule and 3 on/off periods per day, users can easily adjust and maintain optimal heating settings. This corded electric thermostat features a wall-mounted rectangular design in white plastic, making it a sleek and modern addition to any home. Compatible with various heating systems and offering features such as timer and cool stages, the Honeywell ST9100C is a versatile and user-friendly choice for efficient heating control.
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Working order. Used. Device only with box. Manual and batteries not included. See photos. Good condition.
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