Our aging heat pump, which used a coolant banned by the Environmental Protection Agency, had reached the point of no return. So we contacted Sig Cox (we've been a customer for years) and Doug set up a day and time for our new unit to be installed. The three-man crewmen were pleasant and professional and worked hard for several hours, removing the old unit and doing other work. Then they installed a new Lennox and stayed until it was working. We felt so sorry for those men after it was discovered the compressor was bad and had somehow escaped the factory check. So a replacement was ordered and took four days to arrive. Two of the original three-man crew worked on hooking it up and stayed until it was determined to be working fine. One of them came into the house and instructed my wife on how to use the new thermostat. We have enjoyed the cool/warm cycles ever since. We have been so pleased over the years by Sig Cox's consistently fine work, including seasonal checks (summer and winter) of our two heat pumps every year. Stay safe!