News archive for January, 2022
New Part L 2021 – The Impact of Heat Losses
Posted on January 24th 2022
Part L 2021 places significant weight on heat network heat losses and will require design enhancements to meet carbon & primary energy requirements. Part L 2013 allows a default Distribution Loss Factor (DLF) in SAP of 1.05 (i.e. 5%), which has always vastly under-accounted real heat losses. The new Part L offers three possibilities: Use a default DLF of 2 …
Water Neutrality Requirements Bring Extra Costs
Posted on January 19th 2022
New water neutrality requirements in North Sussex require all new developments to substantially reduce the water usage of new homes and offset the remainder. Water consumption values need to reduce from the Building Regulation Part G amount of 105L/pp/day for internal water consumption to 85L/pp/day at most. This reduced value can be achieved in two ways: Maximising the water efficiency …
SAP 10.2: CHP Back on the Table?
Posted on January 14th 2022
We now have Government confirmations on how the new Part L and SAP will treat CHP and the results may be more positive than previously anticipated. We previously wrote about the SAP 10.2 proposals regarding CHP. In these, the Government recognised the importance of CHP but the measures proposed were found to not be enough to make them acceptable under …
Will the New Part O Push Central London Developments to use Cooling?
Posted on January 14th 2022
Developments in areas with high external noise levels are unlikely to be able to rely on opening windows to mitigate overheating risk and may be required to install comfort cooling. Approved Document O (Overheating), published on 15th December 2021, sets internal noise limits that must be met in bedrooms during the night. If these limits are not met with windows …