In this video tutorial, viewers learn how to replace and install a programmable thermostat. The materials required for this project are: a screwdriver, masking tape, marking pencil and batteries. Begin by turning off the power of the furnace. Then remove the face of the old thermostat and detach the labeled wires. Now remove the wall plate. Then mount the plate of the new unit and connect the wires to the corresponding codes. Finish by inserting batteries, placing the face plate on the wall plate and program the thermostat. This video will benefit those viewers who have a thermostat, and would like to learn how to install and replace it for energy efficiency.