Last evening as I entered the basement I immediately saw that the carpet near my furnace was completely saturated. I feared that water might be coming from a plugged condenser on the furnace. I called Dupont Heating after-hours answering service with no expectation I could get a service technician before sometime the next day. I spoke to someone who reassured me he would call an on-call technician immediately. Within 30 minutes of my call a Dupont Heating technician arrived at my door. He insisted on taking off his shoes at the front door and carrying them to my wet basement (very considerate!). He determined that my furnace was secure and running properly. He checked my hot water heater, and then my nearby bathroom where he found a problem. I seem to have a plumbing problem, not a furnace problem. The technician was able to refer several reputable plumbing companies for me to consider and since he was so helpful and professional I felt confident in calling one of them. I have been a client of Dupont Heating for five years or so and would recommend this company without hesitation.