The government has set the ambitious target of a 20% cut in carbon dioxide emissions by 2010. Changes to Part L of the Building Regulations are designed to help achieve this.
The purpose of this article is to ensure that potential specifiers of underfloor heating systems are aware of a temporary amendment made within SAP 2005’s calculation protocol, as well as other useful tips which may help to further reduce the DER score.
Previously, specifying an underfloor heating system as “heating pipes within screed or concrete” would have incurred a response penalty and subsequently generated a poorer DER score than a system heated with radiators. Now, because the BRE recognise that this unfairly penalises floor heating, any system installed over insulation in a screed thinner than 65mm can be modelled in the approved SAP assessment software (e.g. Elmhurst; NHER, BuildDesk, etc…) as “pipes in insulated timber floor”. This significantly improves the overall DER value of the dwelling.
Download our detailed Part L information sheet by clicking here.
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