I recently purchased a humidifier from Home Depot and one of the guys from Airplus installed it. Was very helpful, fast, and patient, despite problems with the Home Depot product (which I had poorly selected!). As it turned out, the product was not designed for my type of furnace. I may have to return it, and my phone calls to Airplus for further advice were very informative and helpful in making this decision. I wish I had called them before buying my humidifier!