My new Nest Gen 3 is so slow to heat my house in comparison to my old smart thermostat. I have a Gas Combi boiler in the U.K. and in our latest cold snap I have the minimum set to 12°C when I increase the temperature to 22°C it goes up by just one degree per hour ! I know it has a certain delay time but ten hours to reach it's target is ridiculous ( Considering the cost of energy ) when I only want it on for no more than five hours. So does the heating control or anything on the boiler need adjusting ( the boiler was serviced prior to the Nest being fitted two months ago. Help Please ?
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