Obtaining this unit is a good choice for a small space and at the same time if you are looking for a complete laundry facility.
The stackable washer-dryer is designed wherein the dryer is on top of the washer unlike the usual side-by-side thing.
You can choose from a selection of designs but will need to consider some factors in buying one.

1. Size.
   This pertains to the width for which the most common widths are 27 and 24 inches.
   The bigger machine gives you an adantage of a large capacity, whereas the smaller machine gives you convenience and space savings.
   
2. Voltage.
   Most entail a power outlet of 220 volts.
   Compact units require the 110-volt outlet.
   Before finally buying one, you need to have your electrical condition check.
   
3. Washer configuration.
   You can choose between the top- and front-loading designs.
   Front-loading units are cost-efficient as it uses only 2/3 less water.
   The top-loading, however, is cheaper and goes easy on your back.
   
4. Electric versus Gas.
   Naturally, if your house is intended for gas, this will be a best option, but if not, then get the electric powered.
   
5. Energy Rating.
   The Department of Energy gives their energy rating for these stackable washers and dryers.
   Check the yellow sticker.
   A lower number indicates that the unit is more energy efficient and will therefore lessen your bills, although they cost a few bucks more.
   

Since the washer-dryer combo is energy efficient, you are assured of getting savings on your utilities.
They also use less detergent even with a bigger capacity.
The best advantage, though, of a stackable washer-dryer is you can make use of your small space into full use.
By stacking things on top of each other, there is no worry of having to take up more room in an already small area.