If tonight will be too cold for the heat pump, set the thermostat even lower (Part 1 of 2) (Ecobee)

If your only source of heat is a heat pump with electric backup, this will save you money by lowering the heating setpoint even further on nights that are too cold for the heat pump to run. Normal operation resumes in the morning. (Requires companion recipe 268223) https://ifttt.com/recipes/268223