Home Improvement → Re: Nest & Tracking Heating Effeciency

The Nest won't save you anything that will make the slightest real life difference over a regular programmable thermostat - unless you have no insulation and turning the heat off even for 1 hour will cause your house to cool significantly.
You only achieve savings when you allow the house to cool, as heat losses depend on the in-out temperature difference and lower indoor temperature means lower losses.