20. Use A Programmable Thermostat
Every little thing in your house could help it become more eco-friendly. Take your heating and cooling system, for example, the way you use it could affect your bill significantly. To be more aware of energy usage, we recommend using a programmable thermostat. It is quite efficient and saves you lots of energy. Furthermore, you can easily customize it to your needs. By using this system, you should save up to 15% on your heating bill.