Commercial or technical designation of a manufacturer's product family sharing a common design and compatible characteristics.

Range of tasks and systems for which the manufacturer recommends the component.

Primary function of the device and its intended use as defined by its design and the manufacturer's documentation.

Permissible installation location of the product: indoors, outdoors, in a technical area, or as part of equipment.

Environmental conditions under which installation and operation of the product are permitted.

External horizontal dimension of the product between its outermost lateral points.

External vertical dimension of the product from its lowest to its highest point.

External distance between the foremost and rearmost surfaces of the product.

Mass of the product itself, excluding transport packaging, additional accessories, and external equipment.

Number of independently identifiable electric heating elements.

Number of discrete electrical heating stages.

Nominal usable or total storage tank volume.

Number of external hydraulic water connections.

Primary material from which the product is manufactured.

Grade, alloy, class, or technical designation of the product's primary material.

Primary visually perceived colour of the product's external surface.

Type of final surface finish of the product determining its appearance and service properties.

Primary resistive or heat-generating material used in the heating element.

Material or technology of the corrosion-protection anode.

Installation arrangement permitted by the product design, such as wall-mounted, flush-mounted, floor-mounted, or another specified mounting type.

Method used to mechanically secure the product to a support, surface, or load-bearing structure.

Permissible spatial orientation of the component during installation and operation.

Type of electrical current for which the product's main supply circuit is intended.

Voltage value assigned to the product by the manufacturer for specified application conditions and characteristics.

Current assigned to the product by the manufacturer for the declared operating and thermal conditions.

AC frequency assigned to the product for normal operating conditions.

Number of phases of the electrical system for which the product is designed to be connected or used.

Configuration of live and neutral conductors of the electrical system supported by the product.

Rated active electrical power of the product declared by the manufacturer for specified operating conditions.

Manufacturer-declared rated electrical input power consumed by the product at the specified operating point.

Manufacturer-declared rated apparent power of the electrical load.

Manufacturer-declared rated reactive power of the electrical load where applicable.

Manufacturer-declared power factor of the load at the specified operating point.

Peak input current occurring during energization or startup of the device.

Manufacturer-declared duration associated with the specified input inrush current.

Electrical power consumed by the product itself in the declared normal operating mode.

Manufacturer-declared electrical power consumption while the product is energized but not actively switching the controlled load.

General operating duty of the electrical load, such as continuous, intermittent or cyclic.

Fraction of a repeating operating period during which the load is energized or actively operating.

Indicates whether a neutral conductor connection is required for the product to perform its intended electrical or electronic functions.

Indicates that connection to protective earth is required for the declared electrical safety or operating conditions.

Indicates whether a supply cable is permanently connected to the product or supplied with it.

Length of the supply cable supplied with the product or permanently connected to it.

Manufacturer-declared standard or type designation of the supply cable fitted to or supplied with the product.

Indicates whether the supply cable can be replaced in accordance with the procedure specified by the manufacturer.

Type or system of mains plug integrated into the product or supplied as part of it.

Conductor connection methods supported by the specified terminals or connection elements.

Minimum conductor cross-section permitted by the connection system within its general conductor-size range.

Maximum conductor cross-section permitted by the connection system within its general conductor-size range.

Tightening torque specified by the manufacturer for a screw or bolted terminal connection.

Types of electrical heating loads for which the manufacturer declares suitability.

Minimum user- or controller-selectable temperature setpoint.

Maximum user- or controller-selectable temperature setpoint.

Minimum selectable or operating water temperature.

Maximum selectable or operating water temperature.

Steady thermal heat loss of a hot-water storage product under the declared reference conditions.

Declared energy-efficiency class according to the applicable product labelling scheme.

Manufacturer-declared or regulated annual electrical energy consumption for the stated reference usage profile.

Degree of enclosure protection against access to hazardous parts and ingress of solid objects and water, designated by the IP code.

Class of enclosure resistance to external mechanical impacts designated by the IK code.

Class of protection against electric shock determined by the product design and protective connection method.

Indicates that the manufacturer or design specification recommends supplying the load from a dedicated final circuit.

Manufacturer- or design-recommended rated current of the upstream protective device.

Recommended upstream overcurrent or combined protective-device technology for the load.

Recommended instantaneous/time-current characteristic of an upstream circuit breaker where declared.

Indicates that residual-current protection is explicitly required by the product or circuit specification.

Recommended residual-current device sensitivity technology such as AC, A, F or B where explicitly specified.

Indicates that a dedicated overtemperature limiter, thermal cut-out or equivalent protection is provided.

Minimum ambient temperature at which normal operation of the product is permitted.

Maximum ambient temperature at which normal operation of the product is permitted.

Minimum ambient temperature permitted during storage of the product while not in operation.

Maximum ambient temperature permitted during storage of the product while not in operation.

Maximum relative air humidity permitted for the declared operating or test condition.

Technology or construction of the primary electric heating element.

Functional construction of the electric water heater.

Declared continuous hot-water flow rate under the specified temperature-rise condition.

Maximum permitted water-side working pressure.

Indicates that the water storage tank includes a sacrificial corrosion-protection anode.

Manufacturer designation of the hydraulic water connection size or thread.

Primary method used to regulate product or medium temperature.

Indicates that the product incorporates its own thermostat or temperature controller.

Indicates availability of a low-temperature frost-protection operating mode.

Declared time required to reheat the stored water between specified temperatures.

Indicates whether the CE marking is applied to the product where applicable.

Indicates whether product compliance with applicable RoHS restrictions on hazardous substances has been declared.

Indicates whether the manufacturer declares compliance of the product with applicable REACH Regulation requirements.

Indicates whether the product falls within the scope of WEEE requirements for waste electrical and electronic equipment.

Manufacturer-declared compliance with IEC 60335-1 general safety requirements for household and similar electrical appliances.

Indicates that the product is subject to an applicable EU energy-labelling scheme.

Indicates that the product is subject to applicable EU ecodesign requirements.

Manufacturer-declared compliance with the applicable IEC 60335-2-21 requirements for storage water heaters.

Manufacturer-declared compliance with the applicable IEC 60335-2-35 requirements for instantaneous water heaters.