Hot Water Down the Drain: Unlocking hot water decarbonisation through the Warm Homes Plan
As homes become better insulated and space heating is decarbonised, hot water is set to become the dominant source of household energy use, emissions and water demand. This white paper explores a critical but often overlooked opportunity: hot water decarbonisation. Drawing on independent analysis, it shows that high-efficiency instantaneous electric showers (IES-HE) connected to waste-water heat-recovery systems (WWHRS) can reduce shower energy use by over 80% compared to a conventional mixer shower, while also cutting annual shower running costs by around 40%. The paper sets out why a technology-agnostic approach to the Warm Homes Plan is essential to deliver net zero, tackle fuel poverty, and get ahead of growing water scarcity challenges.
Key Insights from the white paper
- Hot water could account for up to 50% of household energy demand in future low-heat-loss homes
- Electric showers can cut showering emissions by up to 87.5% compared with mixer showers
- Annual shower running costs fall from £354 to £209 per household, delivering a saving of around £145 per year
- Up to 902 million litres of potable water could be saved by 2035 if supported through Warm Homes Plan schemes
- High-efficiency electric showers connected to WWHRS deliver lower running costs and improved household resilience
- Electric shower technology is well-suited to small, hard-to-decarbonise and space-constrained homes
- Clear policy opportunities exist across Warm Homes funding, EPCs (RdSAP / SAP / HEM), and water-efficiency regulation
Get in Touch
Download the white paper to explore the evidence, analysis and policy recommendations - and see how hot water decarbonisation can deliver immediate bill savings alongside long-term progress on net zero, water efficiency and fuel poverty.
For further discussion or collaboration, please get in touch:
Paul Ravnbo-West
Market Development Manager
Triton Showers
Paul_ravnbo-west@tritonshowers.co.uk
