Brennen was excellent. He provided solutions for both the continuous cool air coming from the overhead air ducts and cleaning the air filter for the attic air cleaner. Both solutions have made the heat pump and air cleaner much more comfortable and easy to maintain. These were major concerns of mine. The house is much warmer and it is nice not to have a continuous cool wind on my shoulders. He answered all the questions and I didn't feel like he was trying to get out of the door.