Division 3 The methodology shall be laid down taking into consideration at least the following aspects:

the following actual thermal characteristics of the building including its internal partitions:

1. (i)

   thermal capacity;

2. (ii)

   insulation;

3. (iii)

   passive heating;

4. (iv)

   cooling elements; and

5. (v)

   thermal bridges;

heating installation and hot water supply, including their insulation characteristics;

air-conditioning installations;

natural and mechanical ventilation which may include air-tightness;

built-in lighting installation (mainly in the non-residential sector);

the design, positioning and orientation of the building, including outdoor climate;

passive solar systems and solar protection;

indoor climatic conditions, including the designed indoor climate;

internal loads.