Two disadvantages of a stackable washer and dryer are the cost of the appliances and the dryer's stacked height, which might not be ideal for everyone. For example, the added height can be difficult for an elderly person or someone with limited mobility.
Although stackable washers and dryers save space, most of the compact washer and dryer units have fewer features than standalone units do. Many stackable washers and dryers are sold as a pair, and one piece can sometimes be of better quality than the other. If one unit breaks down and the other does not, a huge disadvantage results. To solve this problem, many users have chosen to purchase separate washers and dryers and stack them themselves. This allows for more flexibility in choosing features and the quality of the units. In order for a person to stack the washers and dryers, the washer must be front loading, and controls should be located on the front of the machine.
If the washer and dryer are full sized, users need a supporting framework for the dryer. They also need to make sure of ample vertical space to support the entire structure. Customers should look for Energy Star designations to save money on bills.