The UKs Standard Assessment Procedure
SAP 10 & RdSAP 10
Kelda Showers are recognised within Appendix Q of the UK governments Standard Assessment Procedure and the Reduced Data Standard Assessment Procedure
Kelda’s Air-Powered™ showers can be modelled through SAP Appendix Q
Download Spreadsheet
Click here: Air-Powered shower spreadsheet
SAP Model Qualifiers
• Deluxe Shower Panel – 93XXXXX5
• Void Shower System – 91XXXXX5
Test Calculations
Test calculations have found that replacing a conventional mixer shower with our Air-Powered shower can help achieve compliance with Part L of the Building Regulations* and, as less water is used, it can also help with Part G.
Download the SAP Appendix Q spreadsheet. Please consult our guidance notes if you have any queries.
Part L*
• Reduced DER and DPER by up to 10 percentage points.
• Achieved minimum emissions and primary energy targets with up to 2 PV panels fewer.
And, when connected to WWHRS (System A):
• Reduced DER and DPER by up to 27 percentage points.
• Improved SAP score by up to 2 points.
• Achieved minimum emissions and primary energy targets with up to 4 PV panels fewer.
Part G
• Can help reduce the dwelling consumption of potable water to 105 LPPPD as required in Building Regulations in 2025 (using the fittings-based approach). In fact, along with other efficient water fittings it is possible to reduce water use to 75 LPPPD.
• Can help qualify for a water efficiency discount of up to £280 per plot (applied to infrastructure charge by water and wastewater companies). Please find further information here.
While lowering homeowner water and energy bills by around £385 per year**.
* Results based on a two-storey, three-bed semi-detached or end of terrace dwelling, in which space and water heating are provided by a mains-gas combi boiler. One bath and one shower only.
** According to Energy Saving Trust.
RdSAP 10
Kelda Showers’ groundbreaking Air-Powered™ technology is now officially recognised within RdSAP – the UK’s Reduced Data Standard Assessment Procedure and the official methodology used to assess the energy performance of homes in the UK.
This recognition confirms that installing Kelda showers can positively impact a property’s Energy Performance Certificate (EPC) rating – and we are the only shower to be recognised within this model.
Guidance Notes
Related Links
What is RdSAP and how Kelda can boost your energy rating
Find Out More