Jan was wonderful. What a pleasant and knowledgeable man. I was made very comfortable having him in my home. He explained everything he was doing. How my system was holding up and how I could get better and more cost effective equipment and behaviors that would maximize my heating and cooling Dollar. I have had other technicians who I did not trust and did not keep me abreast if current trends: Dykstrra has been in my home once before and I appreciated the service so much that I requested them again. We are very happy with the Dryrstrum service thus far and will request them again!