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This document is applicable to gas-fired appliances producing domestic hot water. It applies to both instantaneous and storage appliances; water-heaters and combination boilers that have: - heat input not exceeding 70 kW; and - hot water storage capacity (if any) not exceeding 500 l. In the case of combination boilers, with or without storage tank, domestic hot water production is integrated or coupled, the whole being marketed as a single unit. This document sets out in qualitative and quantitative terms the performance in delivery of domestic hot water for a selected variety of uses. It also gives a system for presenting the information to the user.

This document specifies design criteria for closed water-based cooling systems in buildings. The requirements aim at achieving a proper technical quality level and maintaining the desired thermal indoor climate with minimum energy consumption. Systems for dissipating process heat from industrial processes, for example, are not covered by this document. This document does not amend product standards or product installation requirements. The document covers cooling systems of the following type (see Figure 1): 1) devices for the water-based heat rejection of the chilling system; 2) devices for chilling and storage of chilled water; 3) devices for the distribution of chilled water; 4) devices for the absorption of heat (“cooling emission”); 5) control devices; 6) safety devices. Figure 1 - Schematic example of a water-based cooling system The design of such systems is described in this document. Additional safety aspects for water-based cooling systems with local operating temperatures ≤ 0 °C are not covered by this document. The other clauses of this document are still valid for systems with local operating temperatures ≤ 0 °C. This document does not cover the chilling system itself, but only the parts of the chilling system which are an integral part of the cooling system, including determination of the design performance. Furthermore, this document does not cover: - the requirements for installation or instructions for operation, maintenance and use; - the design of the system components (e.g. recooler, chilling system, coolers, pipes, safety devices etc.).

This document specifies the requirements for the installation and commissioning of water-based heating, water-based cooling, and heating of domestic hot water (DHW) systems in buildings with a maximum operating temperature of 105 °C. This document does not cover superheated water systems and steam systems. This document covers the commissioning of the system as a whole, in case of new systems, renovations, replacement of equipment. It does not cover the specific commissioning requirements for these components (e.g. how to set fuel/air ratio on a burner). This document does not cover the installation or commissioning of attached systems (e.g. air conditioning, domestic hot water distribution, ventilation systems). This document covers only the technical requirements and does not cover any commercial or contractual arrangements between parties.

This document specifies the characteristics and the requirements of air gap with injector Family A, Type D for nominal flow velocity not exceeding 3 m/s. Air gaps are devices for protection of potable water in water installations from pollution by backflow. This document applies to air gaps in factory-assembled products and to constructed air gaps in situ and defines requirements and methods to verify and ensure compliance with this document during normal working use. The fluid in the receiving vessel is assumed to have similar properties to the water supply. Where this is not the case, additional care or tests may be required to verify the efficacy of the solution in practical use. The AD device is intended to be used in potable water installations according to EN 806 (all parts).