I puchased a new Heat Pump and furnace as well as humidifier in our home for $15,000 from Home Depot and they subcontracted the installation to A Plus Air. After the installation we had very dry air in the house which caused us discomfort sleeping at night. We often called A Plus Air to service our system annually. 9 years had passed and we finally discovered that A Plus Air had never cut a hole into the furnace duct to allow moist air to flow from our humidifier through our heating system. They attached the humidifier flange to the solid metal wall of the exterior of the furnace with 8 screws but never cut a 6 inch hole into the furnace. They have the sales contract yet denied they installed the humidifier and refused responsibility unless I provided my receipt. It took me 6 months to locate my receipt when they had the paperwork all this time. I'm very disappointed with Home Depot's refusal to take accountability and will never use them again