So far everything is working fine. We are anxious to see our utility bill. These guys even worked in the rain and got soaking wet! You should provide them with a small pop-up cover when they get in situations with inclement weather. Josh had to leave to get a part and was gone for more than an hour but Chris kept working. Chris also reinstalled a shelf they took down to install the unit. They were here from 9:15 am until 9 pm, an all-day job! We didn't know it would take that long to install the unit. It does look nice and professionally done however! Chris also showed us how to use the thermostat when he was all done.