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    Proving the ROI of investing in water saving washroom equipment: part 1

    We work with many clients who want to be able to measure the ROI of investing into water saving washroom equipment such as waterless urinals or water saving taps. Understandably, financial directors often require proof of the likely ROI before signing off the capital expenditure involved in a washroom refit. In this blog I’m going to outline the process for doing this using the example of a major chain of service stations, who have installed our Conti+ Ultra water saving taps which use up to 70% less water than traditional taps.

    In order to measure the ROI they would achieve from installing  water saving taps, the company first needed a clear idea of their existing water usage. We took one service station and installed water meters (two measuring hot water consumption and two measuring cold) in two banks of tap ranges. We used these to measure hot and cold water consumption over a period of 10 weeks.

    • The results showed that prior to the installation of water saving taps the site used 252.6m3 of water over the ten week monitoring period (150.3m3 of cold water and 102.3m3 of hot water).

    We then installed 15 Conti+ Ultra taps and measured the water consumption for a further 10 week period. We were then able to compare water consumption before and after the installation of the taps. Ten weeks is generally long enough to be representative and so we were able to extrapolate from that what the saving would be over the course of a year.

    • The results showed that after the installation of water saving taps the site used 51.5m3 of water (28.1m3 of cold and 23.4m3 of hot).
    • This is a saving of 201.1m3 water over a ten week period which equates to a saving of 1,045.72m3 over a full year – a reduction of almost 80%.
    • At the time of the test the company was paying £1.705 per m3 for their water so this reduction in water use equates to £1,782.95 over the year for a single washroom.

    The company also wanted to know what their total hot water saving was for the test period, in terms of the energy that they had saved due to the reduction in hot water usage. For this we calculated the cost of the hot water used, assuming it was all heated in one hour, and then multiplied this by a diversity factor of 12 to take into account the fact that the facility is open 24 hours a day. This is a conservative estimate, rather than multiplying by 24, to take into account that usage will vary according to the time of day.

    • Over the course of the 10 week trial the company cut hot water usage by 78.9m3, which equates to a reduction of 410.28m3 (or 410,280 litres) over a year, the equivalent of 1,124 litres saved per day.
    • It takes 59.2 kwh of energy to heat 1,124 litres of water if heated in one hour.
    • The service station chosen is a remote site using LPG rather than natural gas. One litre of LPG produces 6.9kwh and cost £0.178 per litre so the company saved at least £4.02 per day in heating costs.
    • The total saving on the cost of heating water is £1,467.30 over the course of a year.

    Using these figures we were able to calculate that the water saving taps would save a total of £3,250.25 per year (£1,782.95 in reduced water usage and £1,467.30 in heating costs) and pay for themselves within 16 months from installation. This figure takes into account the cost of running the trial and the metering too, as there is obviously a cost associated with installing meters that needs to be factored in when calculating ROI.

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    Lord Rupert Redesdale

    Lord Redesdale was the Energy Spokesman for the Liberal Democrats for the House of Lords 2000-2008 during which time he introduced many members’ bills in the area of energy and conservation.

    Lord Redesdale is the CEO of the Energy Managers Association (EMA). The EMA aims to promote the development of energy management and the career structure of Energy Managers in the British economy.

    In 2016, Lord Redesdale co-founded The Water Retail Company (TWRC) with Professor Jacob Tompkins. TWRC is a licensed retailer with a focus on water efficiency and reduction strategy for its customers.

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    Professor Jacob Tomkins

    Jacob is the the co-founder and CTO of The Water Retail Company. Jacob trained as a civil engineer with degrees from UCL and Imperial. He worked as an academic, was water lead for the National Farmers’ Union and freshwater advisor at Water UK. He set up and ran Waterwise the water efficiency NGO for over 10 years. He has developed EU water legislation and recently chaired a UK Govt task force on resilience in the water sector.

    He is currently writing two books for Wiley on water efficiency and water and behaviour. He is a visiting Prof at Exeter University and has an OBE for services to water efficiency.

     

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    Harvey Djangogly

    Harvey brings over ten years of experience designing, leading, and evaluating initiatives that engage individuals, households, and employees in sustainable living, and that motivate pro-environmental change. Harvey works with and advises public, private and civic sector organisations in the UK and U.S. and abroad, focusing in particular on his passion –sustainable water use and efficiency.

    Harvey believes in the dual approach of “behaviour change” harnessed with innovative technology to achieve the goals of meeting water and carbon footprint reduction targets. The FlowlessTM by WINT solution, epitomises Harvey’s philosophy by allowing customers to monitor their water use in real time, empowering them to save water by introducing efficiencies and most importantly preventing and detecting escape of water and leaks thereby providing water security to the client’s facility/workplace

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    Marcel Napflin

    Marcel Näpflin is a long-standing member of the management team of URIMAT Schweiz AG, a leading manufacturer of environmentally friendly products in the sanitary industry. As Director for Marketing & Sales and Member of the Executive Board, Marcel has been responsible for the international marketing and sales strategy and the worldwide expansion of URIMAT. Under his leadership URIMAT developed numerous worldwide patented product innovations which save water, improve hygiene and reduce carbon footprint in restrooms.

    In his role as Business Development Manager Marcel was responsible for the development and launch of URIMAT-CONNECT, a cloud-based digital advertising system built into multi-media waterless urinals which dynamically deliver real time advertising messages via the internet. Marcel is a graduate business economist and has commercial diploma in banking. After he started his professional career in banking he worked in various management positions in the Sporting Goods Industry. 

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    Marcus Rose

    Marcus Rose is Managing Director at Ecoprod and URIMAT UK. He is a fully qualified mechanical engineer by training & background, with many years’ experience in the construction industry especially related to mechanical, sanitary and washroom applications.

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    Paul Musgrove

    For the last 3 decades Paul has worked in the UK and International Projects Business to deliver  correct solutions for customers in an ethical and consultative and technical approach.

    He has qualifications in commercial contracting working in healthcare environment, for the last 12 years specialising in water-related products.

    Today, sustainability aspects are key whilst also balancing this with keeping water ways moving and clean. Understanding how water is stored and delivered in buildings with an awareness on pathogens in our waterways, and how we as manufacturers can change products to help with infection reduction.

    His greatest achievement, second to his family, is the work he carried out in Botswana, working at a high level with government officials to deliver five new hospitals over four years in very poor conditions, which required the development of new communities, housing, schools etc.

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