The Importance of Dishwasher Insulation

Energy Efficiency

• As much as 80 percent of the energy your dishwasher uses goes to heating the water to wash the dishes. A properly insulated dishwasher keeps the water hot so the dishwasher cleans dishes more efficiently. A stainless steel tub acts as an added layer of insulation in a dishwasher because it reflects heat. Dishwashers with a stainless steel tub and proper insulation may run on a 450 watt heating coil, rather than the 600 to 750 watt coil needed for dishwashers with plastic tubs.

Noise

• If running your dishwasher sounds something like a rocket launch, the cause may be inadequate insulation. Newer dishwasher models use soundproofing insulation to quiet the motor noise, resulting in an almost silent appliance. Additional quieting features may include vibration absorbers, sound-absorbing wash tubs and low-noise pumps.

Installation

• Built-in dishwashers come with insulation along the sides, top and door of the dishwasher. If your dishwasher isn't as quiet as you'd like, you can replace the insulation with high-quality, soundproofing insulation. Specialty appliance stores carry soundproofing insulation, which can easily be installed in the front panel or on the sides of the machine. Unplug the unit or flip the breaker switch to eliminate power before working on the dishwasher.

Considerations

• Most dishwasher manufacturers don't offer many details about the type or amount of insulation used in their products, but dishwashers with an Energy Star rating usually have sufficient insulation. Machines that offer quiet operation features are also well-insulated. In addition to adequate insulation, look for a dishwasher with energy saving options, such as an air dry cycle or quick wash cycle. Avoid installing the dishwasher next to the refrigerator because the heat of the dishwasher taxes the refrigerator's cooling system.