You get a two-hour window, not a day. The old machine gets hauled away and recycled - we do not leave it on your curb or in your garage. The new one gets uncrated, carried in, leveled, and connected, and the crew runs it through a full cycle before they leave so you are not the one who finds out it does not work.
Washers get new supply hoses installed, not your old ones reconnected. Gas ranges and dryers are connected by our licensed technician, because that connection is licensed work by law and a shortcut there is not a shortcut worth taking.
Measure twice before you order: the doorway width, the stair turn if there is one, and the hallway - not just the space where the appliance will sit. A refrigerator that clears the alcove but not the hall turn is the single most common delivery failure in this trade, and we check it with you beforehand rather than finding out on delivery day.
