Our air conditioning unit froze up and my husband found Ed on Angie's list. He showed up on time, was very pleasant and professional. He diagnosed our frozen unit due to our filters needing to be changed every month instead of every three months. He also checked our heating system with no extra charge and gave us a discount with an Angie's list coupon. He also recommended that we needed extra insulation in our attic to prevent losing cool air in the summer and hot air in the winter. We will recommend Ed Kuhn to everyone.