2015-01-3265 - Pravilnik o načinu delitve in obračunu stroškov za toploto v stanovanjskih in drugih stavbah z več posameznimi deli

CEN/TC 171 origin - New Figure 1 so as to correct inconsistency in three language versions.

NOTE   See Clause 3 for a definition of the terms used below.
This European standard applies to heat cost allocators which are used to capture the proportionate thermal output of radiators in consumer units.
If an account unit comprises consumer units of different types (e.g. technically different types of heating systems or differences due to the consumer behaviour, e.g. industrial plants as opposed to private apartments), it could be necessary to divide this account unit into groups of users.
Heat cost allocators enable the determination of the heat consumption only of each radiator in a consumer unit as a share of the total heat consumption of the account unit or user group (see Clause 4); it is therefore necessary to determine this total heat consumption either by measuring the consumed fuel quantity or the amount of heat delivered (the latter by means of a heat meter, for example).
For the appropriate use of the heat cost allocators in accordance with this standard, the heating system needs to:
-   correspond to the state of the art at the time of installation of the heat cost allocators;
-   be operated in accordance with the state of the art (see A.2).
This standard specifies that heat cost allocators shall not be used for heating systems where the temperature of the heating system falls below or exceeds the temperature limits of the heat cost allocators, where the rating factor for the thermal output, KQ, cannot be clearly specified or where the heating surface is inaccessible. This applies usually to the following heating systems:
-   floor heating;
-   radiant ceiling heating;
-   flap controlled radiators;
-   radiators with ventilators;
-   fan assisted air heaters;
-   heating systems with steam operated radiators.

ISO 9836:2017 specifies the definition and calculation of surface area and volume indicators.
In defining area measurement, ISO 9836:2017 uses three measurement concepts:
a) the intra-muros and extra-muros concept used in many parts of the world;
b) the wall centre method of measurement used in many parts of the world;
c) variations on these methods to comply with certain national laws or for particular types of buildings.
The surface area and volume indicators defined in ISO 9836:2017 are intended for practical use, as a basis for measuring various aspects of the performance of buildings or as a planning aid. In other words, they should enable judgement to be made on functional, technical and economic aspects of buildings.
ISO 9836:2017 is intended to be used when establishing
- specifications for the geometric performance of a building and its spaces (e.g. in design, purchasing procedures, etc., or in building regulations where appropriate),
- technical documentation relating to the performance of whole buildings prepared by designers, contractors and manufacturers,
- the amount of floor area that will not be effectively available for the placement of an individual's workplace, furniture, equipment, or for circulation, and
- evaluation, comparison or control of the properties of a building which are connected to its geometric performance.
NOTE Although there are a variety of methods of area measurement around the world depending on the country and/or types of buildings, all measuring methods are not necessarily of practical use because of inability to identify real area (e.g. the wall centre method of measurement). Thus, ISO 9836:2017 specializes in the measurement solely for practical use.