Home Quality Mark / HQM beta / B My Home / B1 Comfort /

13 Temperature

Information correct as of 29thMarch 2024. Please see kb.breeam.com for the latest compliance information.

2030s weather files - KBCN000006

The Exeter University Prometheus project contains future weather files which cover the 2030s. These can be found here: https://emps.exeter.ac.uk/engineering/research/cee/research/prometheus/downloads/
13 09 2017 Hyperlink to Prometheus project updated. Applicability to BREEAM International schemes removed - (see  KBCN0732)

Assessing overheating risk in homes – TM59 - KBCN0892

CIBSE TM59 can be used to demonstrate compliance with the requirements in HQM's Temperature issue, where CIBSE Guide A and CIBSE TM52 are referred to in the Temperature issue. This is to recognise the most up to date methodology relating to the assessment of homes, which builds on and refers to relevant parts of standards referred to in the Temperature issue.

Calculating average plan depth for HQM Temperature Tool - KBCN0891

The average plan depth is calculated by measuring, for each room, the distance from the window nearest to the centre of the room. Then  calculate the total distance for all rooms and divide this by the number of rooms. The following should also be taken into account: There is an element of discretion in terms of calculating this and common sense should be applied to ensure that room depth is being calculated correctly, keeping in mind that this aspect is about determining the rooms ability to circulate air as part of managing high temperatures. Generally speaking, the average plan depth only becomes an issue for homes with relatively deep rooms and it does not tend to be a problem in the majority of cases, for the purposes of the HQM temperature tool. The HQM temperature outputs help to determine homes that are less likely to be at risk of overheating in summer months. It is not a design tool and efforts should be applied to reduce risk wherever possible (e.g. appropriate use of ventilation and thermal modelling).

Thermal model sampling - KBCN1015

Thermal modelling, in accordance with CIBSE AM11, does not need to be carried out for each individual home, where the thermal modeller uses their professional judgement to ensure that an appropriate sampling approach is adopted, in line with section 3.1 of CIBSE TM59 and the following considerations: The modeller needs to provide evidence and justifications that demonstrate how the samples have been determined, with their justifications, in line with the above. A house type should include homes that are identical in specification, design and location (end/ mid-terrace, ground or mid/ top floor).
Information correct as of 29thMarch 2024. Please see kb.breeam.com for the latest compliance information.