Max. spin speed
Maximum drum rotation speed in spin mode. The higher it is, the more intense the spin. However, note that not all types of fabric normally tolerate high speeds — a speed
of 1000 rpm or more should be used only for especially durable fabrics, and delicate ones need to be wrung out at low speeds, so the best choice is a machine that allows you to choose the spin speed.
The maximum spin speed (
1200 rpm,
1400 rpm), in particular, determines its efficiency (see Spin class), but this parameter is not decisive — the duration of the spin cycle and the diameter of the drum also play an important role. Therefore, for machines with the same spin speed, their efficiency class may differ.
Water consumption per cycle
The volume of water used by the washing machine during a standard wash cycle. It is measured while washing the maximum amount of cotton underwear for this model with a normal programme and a temperature of 60 degrees.
When evaluating efficiency, one should consider not only the actual water consumption but also the maximum load. So, for example, a model with a load of 7 kg and a consumption of 49 litres per kilogram of laundry will be more economical than a model of 5 kg with a consumption of 40 litres: the first consumes 49/7 = 7 litres per 1 kg of laundry, the second 40/5 = 8 litres per kilogram. This moment is important, first of all, if a large amount of washing is expected.
Many modern automatic washing machines are equipped with intelligent systems that can adjust the water consumption to the actual load and avoid overspending.
Heating element material
The material from which the heater is made. It is a tubular electric heater that heats the water in the machine to the desired temperature. Its durability and resistance to limescale depend on the material of the heating element. The following materials can be applied to date:
— Stainless steel. The classic material, used most widely, provides good efficiency. Hovewer, steel heating elements are prone to the formation of limescale, which can disable the heater and will need to be changed. Therefore, with the high hardness of the water used for washing, it is recommended to use a special protective agent.
—
With ceramic coating. The main feature of the ceramic coating is its high resistance to scale formation, due to which such heaters can last much longer than steel heaters without additional protection, even with hard water. On the other hand, machines with ceramic heating elements are more expensive, all other things being equal.
—
Nickel plated. Another option is designed to reduce the formation of scale on heating elements. Such a coating ensures the durability of the heating element, while it is considered more efficient and energy-saving than ceramics because nickel has a high thermal conductivity
— No heater. The absence of any heating element in the design of the machine. This feature is typical for the
semi-automatic models..., where you need to fill in water manually. Such machines are designed for relatively simple washing; they have a minimum of features and are noticeably inferior to automatic models in terms of washing efficiency. On the other hand, they are much more convenient to transport and are well suited for conditions where there is no way to connect a machine to the water supply.Surge protection
Power surge protection automatically turns off the washing machine in case of power surges. It protects the device's electronic circuits from hazardous loads and prolongs their service life. In this case, the programme running at the time of shutdown is remembered. And when the power is restored washing cycle continues from the point at which it stopped.
Spin class
The quality of the machine spin mode. The spin class depends on the residual moisture content of the laundry after the end of the washing programme and is indicated by the Latin letter from
A to G, where A is the best efficiency,
B and C are good,
D, E are medium, F, G are very weak. The quality of the spin is closely related to the maximum number of revolves of the drum in this mode. Naturally, machines with better spin quality are more expensive, other things being equal.
Noise level (spin)
The maximum noise level produced by the machine during operation. Most often indicated for spinning — this is the noisiest mode of operation; for units without spinning (such as semiautomatic devices), this paragraph indicates the overall volume or the volume in the noisiest mode.
The
quieter the machine works, the more comfortable it is for others. This moment is especially critical if there are small children in the house. However, the decibel used to measure loudness is a non-linear unit, and the actual noise level is best estimated from comparative tables in special sources.