Timed thermostat

Tom,
I am trying to convince a friend that installing a timed thermostat toreduce temperatures at night will save money. So far I'm unsuccessful ashe insists it takes more energy to warm up the house in the morning than you save during the turn down at night. Can you give me some info that might help my case?
Anton Larson

Hi Anton,
I believe that unless the house has some really odd heat lossc haracteristics, a setback thermostat will save energy. The longer the setback and the deeper the setback can be, the greater the savings.
Tom