I found out suddenly during an energy audit that my 30 year old boiler was emitting over 1600 ppm cabon monoxide (16 times the safe limit). I called Charter Oak Mechanical Services and a salesman agreed to meet me immediately. When he came to my house accompanied by another gentleman (who found out later was the owner Steve). They politely explained my options, what needed to be done, and emailed two proposals an hour later. I agreed and their crew showed up promptly the next morning. By the end of the afternoon, they had completely installed the new high-efficiency boiler. The crew was polite and performed the work admirably. I am proud to say that Charter Oak Mechanical Services in Manchester responded to my urgent situation with extreme professionalism and performed great work. Thanks Guys!