The build quality is excellent. it's much more robust than I expected it to be for the price. I installed it plugged it up and I monitored the operation every day that we had a temperature change cold enough to start it and also when it warmed up enough to shut it down. it operated flawlessly so from this point forward I plan to just leave it plugged into its dedicated receptacle. and loosely monitor it. it was money well spent and a rather inexpensive solution to what could be a major problem