The Honeywell Home ST9400 programmer range for the independent control of both heating and stored hot water systems. Features user friendly text instructions (LoT™), large backlit display, automatic summer/winter change and override.ST9400C is a 7 day programmer with up to three on/off switching per day and holiday function. (Direct replacement for ST6400 models).Dimensions 99 x 145 x 35 mm.
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