James Williamson Co

We built a new house Dec. 2016, and had this service install our A/C unit due to a recommendation of our contractor, our home is roughly a 1,500 sq. ft, metal building type house with spray foam insulation in all the exterior walls and ceiling space. This service installed a 3 ton A/C unit for heating and cooling of the house. There was never a manual J performed on the house to determine the size of the A/C required, and no consideration of the improved insulation and air sealing of the spray foam insulation. Our first year in the house we noticed that humidity levels stayed around 60 percent, higher some days, not knowing anything about A/C units we contributed the higher humidity levels to the drying of the building materials over the first year, concrete floors, sheet rock, etc. During the winter months we don’t have these problems, starting our second summer in the house we notice that humidity levels are still high 60-70% relative humidity, we then purchase a dehumidifier from Lowe’s to help combat the problem. I start to investigate the problem and find our unit short cycling with run times from 5 to 10 mins max during the dead heat of summer. I contact this company back now knowing that there is a problem with the A/C unit possibly being oversized. A gentleman from the company meets me at our house one afternoon and inspects the system and tells us that he can not find anything wrong. He tells us that he is going to get their technicians to come evaluate the problem. A week goes by and the technicians come to the house, perform a manual humidity test and find it to be 65% inside the home despite the dehumidifier running. They inspect the A/C equipment and then tell us that the 3 ton unit is WAY oversized for our home and the spray foam insulation and that all of our current problems are being caused by the oversized A/C unit that was installed. They then recommend a 1 to 1.5 ton unit to cool the home and recommend performed a manual J that was never done the first time. The gentleman that works for the company that originally installed the A/C unit claims that he “didn’t know that the home was going to have spray foam”. Which is a lie, because from day 1 we planned and our contractor was aware that we were doing spray foam insulation. Later in conversation talking with the gentleman he says that he doesn’t know anything about spray foam insulation, and installed the A/C unit just using the old rule of thumb method of (X) amount of square feet for every ton of unit, and never performed a manual J on the home. They didn’t and will not make any attempt to make the situation right, despite it being there fault. So now we are left with having to pay thousands to change out the A/C unit to a properly sized unit, a problem that we would not have, had we chose a knowledgeable company to install our A/C unit. If there are other options available to you for A/C installation I would definitely recommend looking elsewhere.