Christian is amazing! He was extremely informative, patient, and an expert in his field. I chose to go with GTA heating because he was referred to me directly by NTI - the foremost company in boilers and heating. I knew that there was a good chance he would be a good match for us given the recommendation, but after I spoke with him on numerous occasions, I was impressed with his professionalism and knowledge. On the day of the install, he arrived exactly when he said he would, and spent the whole day installing the boiler and even fixing mistakes from our previous install. After obtaining many quotes for our install, I am so pleased that we went with the best!