Integrity, the most important word I can say. Very few companies work this way anymore. It's all about up-selling their products and not about doing the job right. Mann came in after dealing with Sandwell HVAC and provided us with excellent service. They were very professional and courteous. The team replaced our whole heating and cooling system in 3 days. First night the performance was noticeably improved. If you are looking for a company you can trust go no further. They have our vote.