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UK Weather Data: Future - DSYs only - London (inc. data for 3 sites) (Part O Co
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UK Weather Data: Future - DSYs only - London (inc. data for 3 sites) (Part O Co

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These files are required for compliance with Part O of the Building Regulations. CIBSE recommend the use of the 2025 release of weather files for building performance analysis at design stage. For more details, please visit CIBSE Weather Data. DSYs The DSY files are used for overheating assessment. The DSY1 file most appropriate for the site location for the 2020s, high emissions, 50% percentile scenario are currently required for compliance with Building Regulations via Approved Document O in England and Wales and Section 3.28 of the Domestic Technical Handbook in Scotland. The DSY represents a single continuous year, used for overheating analysis. The warm year is selected from the 30-year baseline (1984 - 2013) and the methodology for selecting this year is explained in CIBSE TM49, Probabilistic DSY for London and Eames (2016). Three DSYs are available which represent summers with different types of hot events: • DSY1: moderately warm summer • DSY2: short, intense warm spell • DSY3: long, less intense warm spell These are available for the following 14 site locations (two additional sites are provided in the London site package): • Belfast • Birmingham • Cardiff • Edinburgh • Glasgow • Leeds • London (data for 3 sites inc. London City, Gatwick and Heathrow) • Manchester • Newcastle • Plymouth • Southampton • Swindon All DSYs are available for future time periods and emission scenarios based on the UKCP09 climate projections. They are also provided for different probability scenarios (10th, 50th, 90th) to account for the variability and uncertainty in climate projections. In summary, CIBSEs Future DSY files are provided for: • 16 UK site locations, • three time periods: 2020s (2011-2040), 2050s (2041-2070) and 2080s (2071-2100), • the following emissions scenarios: o 2020s - High emissions scenario o 2050s - Medium and High o 2080s - Low, Medium & High • the following probability scenarios: 10th, 50th and 90th percentiles. For more information download CIBSEs Technical Briefing and Testing document. For further advice on which packages to choose please email [email protected]. File Format, Contents and Naming: All sets are presented in three formats: EDSL Tas, epw & Excel. Hourly data for the following parameters are included in each file for 1 year: • Dry bulb temperature (°C) • Wet bulb temperature (°C) • Atmospheric pressure (hPa) • Global solar irradiation (W/m2) • Diffuse solar irradiation (W/m2) • Cloud cover (10ths) • Wind speed (knots) • Wind direction (degrees clockwise from North) Each DSY file is labelled in the following way: Sitename_FileType_TimelineEmissionScenarioProbabilityScenario_.epw Example: Belfast_DSY1_2020Med90_.epw License Information: The price for this product is for a single license. If an additional user license is required these need to be purchased separately. These can be purchased by searching the Knowledge Portal for: • UK Weather Data: Future - DSYs only - Additional User License - for one site (Part O Compliance) [2016 Release] WMD16L1 or • UK Weather Data: Future - DSYs only - Additional User Licenses - for all 14 sites (Part O Compliance) [2016 Release] WMD16L14 A maximum of 9 additional user licenses are required to be purchased. For more information related to multi-user licences, email [email protected]. References and useful links: CIBSE Weather Data - https://www.cibse.org/weatherdata CIBSE TM49, Probabilistic DSY for London (2014) - https://www.cibse.org/knowledge-research/knowledge-portal/technical-memorandum-49-design-summer-years-for-london-2014-pdf/?id=a0q20000008I6yFAAS Eames M. (2016) An update of the UK’s design summer years: Probabilistic design summer years for enhanced overheating risk analysis in building design. Building Services Engineering Research & Technology. 2016;37(5):503-522. doi:10.1177/0143624416631131 CIBSE Weather Files 2016 release: Technical Briefing and Testing -https://www.cibse.org/media/0kckd3lu/weatherdata_technicalbriefingandtesting_final.pdf CIBSE Knowledge Portal - https://www.cibse.org/knowledge-research/knowledge-portal
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