Being a Plumbing contractor and having chosen Eco-King as my exclusive brand to market to my customers in 2012, it was a no brainer as to what I put in my own new garage/office building to meet my own heating and domestic hot water needs. This is installation #29, a C100, and I have three more lined up in the next few weeks. They’ve proven their reliability to me, and my clients are very pleased with their quiet operation and attractive appearance.