Changes to Hot Water Services in NHBC Standards for 2019

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NHBC is the UK’s leading warranty and insurance provider for new homes, setting standards for registered builders and working to help improve the construction quality of homes built.

They recently announced the launch of their 2019 Standards, which will become effective from 1st January 2019. The standards apply to all properties with foundations laid on or after that date.

Evinox are happy to see some updates to ‘Hot water services’ in the new standards, where changes have been made to some of the flow rates and supply temperatures at the outlets. For example, the supply temperature at the kitchen sink has been reduced from the previous 60C to 55C, which is in line with the delivery temperature that was selected for the majority of Heat Networks, during the last year.


NHBC Standards 2019 Table 3


Helen Gibbons, Evinox Technical and Design Manager, Comments, “This change to the outlet temperature is a very positive development as it will enable district and communal heating system flow temperatures to be reduced, something which is especially important for the growth of 4th Generation Heat Networks in the UK.

In addition, the lowered DHW temperature combined with the new table in the NHBC standard for simultaneous hot water use, will give design engineers the confidence to reduce the kW demand for individual properties, something which will improve both efficiency and cost of UK Heat Networks.”

Helen continued, “whilst we are very happy to see that the required temperature from the kitchen outlet has been lowered to 55C for 2019, we do hope to see this further reduced to 50C for heat network developments using instantaneous DHW heat interface units in the near future.”

You can find the full Standard by visiting the NHBC website

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