Waste water heat recovery - Showersave commercial& residential

Already a proven and well established technology; being recognised in SAP and soon to be in SBEM (end of July 2018); with over 10,000 installations in new build homes in UK, greater notice could be taken of this wonderfully simple technology. 
An unintended consequence of focussing the ECO scheme on Affordable Warmth (HHCRO) is that it is now restrictive in supporting space heating measures and misses the opportunity to tackle a high percentage of UK heating bills and CO2 emissions from hot water heating. From a consumer and carbon emission perspective, energy is being used to generate heat – whether for hot water or space heating. Health and well-being issues associated with living in a cold home apply equally to households who can’t afford hot-water for showers, washing up or other hygiene purposes – especially for the very old and the very young.
Despite being the second highest domestic energy consumption by end-use[i], water heating has not been an area of significant policy focus despite a backdrop of an average of 4% rise year-on- year in energy demand in the UK between 2014 – 2016.[ii] As the space heating element of our heating has been, and is being, addressed, so the energy attributable to domestic hot water (DHW) is growing. For the average home, the Energy Saving Trust estimates that hot water costs are around £228 a year. In terms of shower emissions alone, it is estimated that this could be 11% of carbon emissions from homes as indicated by the pathway required by the Clean Growth Strategy by 2030.
Energy wastage from hot water heating should be a key component of energy efficiency policy. A small change in the interpretation of the HHCRO cost qualifying action would represent a starting point to unlock significant opportunity for government, industry and fuel poor consumers.
This applies equally to both resoidential and commercial (new build and retrofit) projects.

[i] Domestic energy consumption by end use and fuel, BEIS, 2016

[ii] Table 3.02: Domestic energy consumption by end use and fuel 1990 to 2016


Why the contribution is important

Shower waste water heat recovery presents a unique and proven opportunity to capture more than 60%  of the energy content which is currently being wasted throughout the UK and deposited through the drainage system for shower hot water.

Our Showersave system for both residential and commercial projects is a simple fit and-forget-measure, which requires no maintenance nor behavioural change for energy savings – it is easy to install and has a long product lifetime and can accumulate over £2,300 in lifetime energy bill savings and over 10 tonnes of CO2e within a residential setting. This is significantly more in commercial environments such as hotels, student halls of residence, prisons and so on. 

With scaled deployment, economies of scale can drive the cost down to below 12p per £ lifetime saving in homes and even lower in commercial settings, providing a perfect opportunity during social housing bathroom refurbishments (estimated at a rate of 180,000 per year), hotel/hospital/halls of resdience new build und refurbishments.  If all homes in the social housing sector included a waste water heat recovery measure during bathroom renovation, over 42ktCO2e and £10million of aggregate bills can be saved per year. This can contribute towards reducing the aggregate poverty gap further and lifting vulnerable and low-income families out of fuel poverty. While also assisting in the clean growth strategy.

[i] 10% per year refurbishment, market intelligence


by tonygordon on July 20, 2018 at 02:37PM

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