I called SDS, Chris Browder – owner, to inspect my dryer venting. He was right on time and called before he arrived to notify me he was on his way. I wanted a different type of venting. He took measurements, picked up the items and installed the vent ducts. He also installed new wireless smoke and carbon monoxide detectors in a few hours. I was very impressed with Chris, he is very knowledgeable in his field and a professional. I would highly recommend his company for any type of smoke alarm work or dryer work.