1 WEEK CONTROLLER DEFECTIVE, SECOND SENSOR DEFECTIVE 2 WEEKS, 2ND CONTROLLER DEFECTIVE IN BOX, SECOND FAN WILL NOT TURN ON. THIS UNIT CANNOT BE USED IN A HEAD WITH SIDE PLUG AND CABLES. IT IS NOT THERMALLY OR ELECTRICALLY PROTECTED AGAINST EMERGENCIES AT THIS LOCATION. TRIED TO USE THE SECOND ONE PURCHASED ON AMAZON IN THE THERMOSTAT HOUSING BUT IT DID NOT INCLUDE THE SECOND FAN. TALK TO ERIK IN DERALE AND HE SHOULD GUARANTEE BUT DID NOT.