www.honeywelluk.com Honeywell Sundial RF² packs are unique in being the only wireless products with the receiver built into the timer. Each pack includes a wireless enabled timer and a wireless thermostat: simply replace the timer and the thermostat works automatically, with no additional wiring. Packs for space heating and stored hot water also include a wireless cylinder thermostat. They feature TPI (Time Proportional and Integral) advanced energy saving control, which provides more accurate temperature control than traditional home controls and uniquely also matches boiler firing to system load, so the boiler operates much more efficiently.
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