What is SAP Appendix Q?
SAP Appendix Q is part of the UK’s system for measuring how energy efficient a home is. This system is called SAP (Standard Assessment Procedure), and it’s used to calculate Energy Performance Certificates (EPCs) for homes.
Because SAP is only updated periodically, it cannot always immediately reflect new technologies or innovations. SAP Appendix Q exists to bridge this gap. It allows proven new products to be recognised between SAP updates by using independently verified performance data.
Appendix Q acts as a temporary mechanism, ensuring innovative products are not penalised simply because SAP assumptions have not yet caught up.
Why Does SAP Appendix Q Matter And How Does It Work?
Some energy-efficient products use less energy, but standard SAP calculations don’t always reflect this properly. SAP Appendix Q helps by using real performance data, so genuine energy savings are recognised. This supports lower energy bills, reduced carbon emissions and fairer, more accurate energy ratings.
In standard SAP calculations, showers are assumed to use at least 8 litres of water per minute. However, air-powered showers typically use much less – around 4.5 litres per minute, while still delivering a satisfying shower.
Appendix Q allows assessors to calculate the reduced hot water and energy use and include this in the SAP assessment before the EPC is produced. This ensures the home’s energy rating more accurately reflects real-life performance.
For a product to be included in SAP Appendix Q:
– It must be independently tested
– The tests must prove it performs better than standard options
– The results are reviewed and approved
Approved products are added to the SAP Appendix Q database for assessors to use.
Why Showers Make a Big Difference
A large part of a home’s energy use comes from heating water, especially for showers. The more hot water you use, the more energy you need.
If a shower uses less hot water, it can:
– Reduce energy use
– Lower household bills
– Cut carbon emissions
– Contribute to the home’s overall energy rating
This is exactly the type of improvement SAP Appendix Q is designed to recognise.
SAP Appendix Q and Energy Ratings (EPCs)
SAP calculations are used to produce EPC ratings, which indicate the energy efficiency of a home.
By helping to reduce hot water and energy use, efficient shower systems like Kelda can contribute to:
– Improved EPC ratings
– Compliance with Building Regulations (Part L)
– More sustainable housing developments
How Kelda Showers Support Energy Efficiency
Uses less hot water
Kelda Showers uses air-powered technology to deliver a great shower while using up to 55% less water than a standard shower. Less water means less energy needed to heat it.
Helps lower energy bills and carbon emissions
By using less hot water, energy use is reduced, which can lower household running costs and environmental impact.
Comfort isn’t compromised
Instead of simply pushing out more water, Kelda infuses air into water to create a full, powerful spray whilst working at a lower flow rate. Many users say they feel as good as, or better than, a traditional shower.
Designed for modern homes
Ideal for new builds, renovations and energy-efficient housing. Kelda is built to help future-proof your home.
Frequently Asked Questions
– Is SAP Appendix Q something homeowners need to apply for?
No. It’s used by energy assessors when calculating a home’s energy performance.
– Do showers really affect energy use?
Yes. Showers are one of the biggest users of hot water in a home.
– Why choose an air-powered shower like Kelda?
Kelda delivers a satisfying shower while using less water and energy, making it better for both your home and the planet.
In Summary
- SAP Appendix Q recognises energy-efficient technologies using real performance data
- Hot water use plays a big role in a home’s energy consumption
- Kelda’s air-powered showers help reduce water and energy use without compromising comfort
- Kelda aligns with the aims of SAP Appendix Q by promoting genuine, everyday efficiency
Discover how Kelda Showers can make your home more energy-efficient today.
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