I did a large amount of research before deciding on Kris and Denmark Mechanical, and I couldn't be happier with our experience and the end result. Due to my husband's asthma, we decided to convert from forced air to radiator heating (with beautiful refurbished Victorian radiators from Addison's; also highly recommended). It was a huge job, but working with Kris really minimized the hassle. Kris is a consummate professional. He is punctual, pleasant and even-tempered; steady and hard-working; has a great eye for detail; prices his job fairly; and at every stage of the game, from planning to execution to follow-up, manifested complete expertise. He thought very carefully about how to best run the pipes and where to install the radiators; each (massively heavy) radiator was perfectly positioned and without any damage to our original wood floors; he recommended and installed a beautifully running, quiet and efficient water heater and reserve tank. And the end result is to die for---all winter long we couldn't stop talking about how cozy and pleasant the radiator heating was. I recommend him most enthusiastically, with no reservations whatsoever.