A combo washer dryer (also known more simply as a washer-dryer in the UK) is a combination in a single cabinet of a washing machine and a clothes dryer. It should not be confused with a "stackable" combination of a separate washing machine and a separate clothes dryer.
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Description
Combination washer dryers are popular amongst those living in smaller urban properties as they only need half the amount of space usually required for a separate washing machine and clothes dryer, and may not require an external air vent. Additionally, combination washer dryers allow clothes to be washed and dried "in one go", saving time and effort from the user. Many washer dryer combo units are also designed to be portable so they can be attached to a sink instead of requiring a separate water line.
Washer dryer combinations are a type of home appliance that handles the basic laundering duties of washing and drying clothes. These machines are often referred to as "combo washer dryers" or "all-in-one washer dryers," but basically the washer dryer combo is the size of a standard or compact washing machine, but is able to perform both washing and drying functions. Designed to handle different types of fabric and garments such as clothes, sheets, and towels, washer dryer combos usually have functions such as temperature controls, customizable cycle controls, and ventless systems. While combo washer dryers are not as effective and efficient as some full-sized, fully functional, separate washer and dryer machines, the combos provide a viable option for those who can benefit from having a compact machine that is able to wash and dry clothes.
Many consumers confuse the term "washer dryer combo" with similar washer and dryer configurations like stackable machines and laundry centers. The main design factor that distinguishes washer dryer combos from other configurations is the fact that the washer dryer combo is a single machine (typically the size of a stand-alone washing machine) that can do both washing and drying tasks in the single combo machine.
Stackable machines, on the other hand, are defined by two separate machines, a washer and a dryer, stacked on top of one another. These stackable machines are often a good choice for large families that still need the full capacity and functionality of a washer and dryer without having to compromise too much regarding space. Most stackable washer and dryer configurations come in the front-loading design as opposed to the top-loading design, which makes it easier to access both the washer and dryer while they are stacked.
The "laundry center" is a compromise between the stackable and the combo configurations. Like the washer dryer combo, the laundry center is a one-piece appliance. Like the stackable configuration, the laundry center comprises two separate machines, the washer and the dryer. In most laundry centers, the dryer is mounted above the washer, making for a one-piece design that offers the compact footprint of a washer dryer combo with the functionality and capacity of stackable washing machines and drying machines.
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History
Aside from the early wringer/washer machine of the mid-19th century, washing and drying machines were not combined until the fully electronic versions of the machines were better perfected in the latter half of the 20th century. Shortly after the very first completely automatic clothes washer was developed by Bendix Home Appliances in 1937, the same company also invented the first washer dryer combination unit in 1953. Throughout the years, washing machines, drying machines, and combo machines alike have received numerous improvements in technology, making for better functionality, effectiveness, and efficiency. Today, washer dryer combination units have many of the features that would be found on a typical washer and dryer. While these units are far more popular in Europe and some countries in the East, they are gaining popularity in the United States as a practical and functional laundry solution.
Typical features
Front-loading design
Most washer dryer combination units are of the front-loading design. This allows for easier access, better efficiency, and more effective washes than top-loading designs. Instead of just leaving the clothes to soak in the water throughout the entire wash, like a top-loading machine would do, the front-loading design tilts the drum on its side, so that the contents of the drum are repeatedly lifted in and out of the water throughout the wash cycle.
Condensation-based ventless drying system
Most washer dryer combos are ventless and are designed with drying systems that work differently from the ordinary stand-alone (vented) dryer. Instead of venting moist hot air to the outside, like a conventional dryer would, the combo unit makes use of condensation similarly to condenser dryers. Hot dry(er) air enters the drum from either the front or the rear, and evaporates some of the moisture from the tumbling clothing. This warm, damp air is then drawn through a condensing chamber, and the extracted water is flushed out the drain hose to the sink or through the plumbing lines. These units are easy to install under cabinets, in closets or anywhere with electricity.
Typically in separate-condenser dryers, cool air is used to cool down the process air from the inside drum and to condense the vapor. In combined washer dryer units, however, cold water is used instead. The water flows in the opposite direction to the air, allowing the air to cool and to release its moisture, which is pumped out along with the water used to cool the air. These machines normally take longer than regular dryers, because the combo unit has a smaller drum, so there is less volume to allow air circulation and the drum itself must be dried immediately after a wash cycle. This water-fed drying system consumes water for both the washing and drying phases of operation, and may not be suitable for areas where water is scarce.
In recent years alternative methods of cooling the condenser have emerged.
Since condensing dryers discharge waste heat inside buildings, they may increase air conditioning heat loads in summer or provide useful heat in winter. Energy and water usage must be evaluated for the entire system over the entire year to ensure a valid comparison.
Automatic sensors and systems
Washer dryer combinations are normally built with a number of sensors and systems to automate much of the washing and drying cycles. Some of the higher model washer dryer combos have sensors that monitor water level, suds levels, temperature levels, and garment dryness. The information gathered by these sensors are used to control the spin speed, cycle settings, draining systems, operational noise, and other functions.
Child lock features
Some washer dryer combination units have child lock features to help keep children and the machines themselves safe.
Capacity
The amount a combo washer dryer unit can hold varies depending on the type of unit. Most hold a slightly smaller amount compared to full size machines. LG makes the only full size washer dryer combos available in the US. Like the equivalent difference between washers and dryers, the washing capacity is greater than the drying capacity on most combo units. Airflow through the drum is a necessary part of clothes drying, so the difference is greater (these units can generally dry only 1/2 to 3/4 of their maximum wash capacity).
Heat pump combo
AEG-Electrolux debuted the first heat pump washer-dryer combo unit at IFA Berlin, September 2013 (AEG Okokombi). Commercialization of this product started in April, 2014, and it is currently available in whole Europe. Main benefits with respect to standard washer-dryers are low-temperature drying (and thus, improved fabric care); energy efficiency, since it uses 40% less electricity compared to standard A-class washer-dryers (according to EU energy label). AEG Okokombi is currently produced at Electrolux Porcia Plant (Italy), where it was designed and industrialized by local R&D, and it is still the only heatpump washer-dryer on European Market, while Toshiba offers a similar product (even if not compatible to European standards) in Asia.
Benefits
The main benefit of washer dryer combination units is their compactness. The small size of these machines compared to the total space consumed by a separate washer and dryer suits them to small homes, apartments, condominiums, and any place where space is an issue. Aside from having a small footprint, combo units also have a small height, allowing them to fit into confined places, like under a kitchen counter or in a closet.
Another potential benefit of combo washer dryers, compared to larger, separate machines, is portability. Some models have wheels that make it easy to move them in and out of different rooms, cabinets, or closets, and the ability to operate without dedicated gas or electrical outlets nor exhaust ducts also makes installing or relocating a machine easier (non-condensing ventless machines can cause humidity problems, however). Some of these machines have even been installed in recreational vehicles.
Some washer dryer combination units are Energy Star certified, which means that they meet a minimum standard for energy efficiency. Some of these washers are also rated well for their water consumption. However, overall environmental and financial impact of any given installation must be calculated not only from the instantaneous energy and water consumption rates, but also the time it must be run per load. A combo machine with smaller capacity than separate machines may have to be run more than once for an amount of laundry that larger machines might handle in one pass, and in doing so could potentially use more energy or water per load than larger, separate machines even if it does have a lower rated power consumption. Conversely, separate machines may be less efficient overall if their capacity is larger than necessary for the loads they will be required to handle.
Washer dryer combination units have most of the features found in modern washing and drying machines. Combination machines, despite being half the size of a separate washer and dryer setup, may have a similar price because they must still contain all the component parts of both.
Disadvantages
In the past combo washer dryer capacity was generally smaller than that of full-size washers, and it also took much longer to process a load of laundry. Currently available washer-dryers are able to wash 9 kilograms (20 lb) and dry 6 kilograms (13 lb) (nominal rating); they are fully comparable to standard washing machines and tumble dryers. Since washing 9 kg of clothes is quite uncommon for ordinary customers, one can wash&dry even large loads with satisfactory performances. Nevertheless, many users say they take out some wet laundry and dry their clothes in two batches to speed drying time. User review sites such as Epinions.com are full of owners who say drying times are long (even if comparable to standard heat pump tumble dryers), and this is one reason why most washer-dryer combos get poorer reviews than full-size washers and dryers
Another major drawback of old washer dryers combos was that they took significantly longer to dry a batch of clothes in comparison to stand-alone dryers. Stand-alone dryers make use of hot air or other heating elements to dry the clothes in a fraction of the time that it took the condensation-based drying system in combination units. This was a drawback that was inherent to the washer dryer combo design, since the dryer had to work longer to dry the drum and its enclosure as well as the clothes inside the drum. On an average, clothes that weigh between 4-5 pounds (1.8-2.3 kg) would have kept the machine working for no less than 4.5 hours. Currently available washer-dryers are much faster than they used to be and can achieve great time savings, together with improved fabric care and no shrinkage, since drying takes place at low temperatures.
Washer dryer combo units not using a heat pump have also been criticized because they are not as efficient as some of the stand-alone machines. For these machines, longer drying times of washer dryer combos also make it difficult to increase efficiency, because the machine has to stay in operation for much longer than a stand-alone dryer does. On the other hand, in heat-pump washer dryers energy is recovered, and it enables energy saving of about 50%.
Considering the drawbacks of washer dryer combo units, some consumers may find these machines to be impractical. Small capacities on old versions, long drying times, poor efficiency ratings (with the exception of heat-pump machines), and pricing all are disadvantages of using these combo machines, which must be weighed against their space saving and convenient hookup advantages.
Brands
An incomplete list of some of the brands that manufacture washer dryer combination units:
Source of the article : Wikipedia
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