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762,119 Litres Saved: Winchester City CouncilOneThreeFive

Metric: Water per flush
Before: 7.64 litres
After: 1.5 litres
Improvement: 6.29 litres saved per flush (~82% reduction)
Metric: Annual water use (8 units)
Before: 857,384 litres
After: 95,265 litres
Improvement: 762,119 litres saved annually
Metric: Annual costs (per unit)
Before:
After:
Improvement: £320.83 annual saving per unit, 3-year payback, £38,500 lifecycle saving (15 years)
Metric: Carbon impact (8 units)
Before: Higher emissions from water supply & treatment
After: 273 kg CO₂ annually
Improvement: Equivalent to removing 475 London cab journeys per year

At Winchester Guildhall, eight Propelair toilets reduced water use from approximately 7.64 litres per flush to just 1.35 litres, delivering an 82% reduction in flush volume. This equates to a total annual saving of 762,119 litres, dramatically cutting consumption compared with conventional toilets and supporting the sustainability goals of Winchester City Council through substantial potable water conservation.

At Winchester Guildhall, each toilet saves £320.83 annually, with eight units delivering significant operational savings. With a three-year payback and projected £38,500 in total savings over a 15-year life cycle, the installation offers strong ROI and reduced maintenance demands. These financial benefits support long-term efficiency goals for Winchester City Council while lowering utility and service costs.

The installation at Winchester Guildhall reduces environmental impact by saving 762,119 litres of water annually and cutting 273 kg of CO₂ emissions. These reductions strengthen carbon reporting and support the climate commitments of Winchester City Council enhancing ESG transparency while demonstrating measurable progress in public-sector sustainability and responsible resource management.

Beyond water, carbon and cost savings, the installation delivers wider operational and experiential benefits for Winchester City Council at the Guildhall:
• Improved hygiene through sealed-lid air flush technology eliminating toilet plume
• Reduced odours via rapid, contained waste extraction
• Enhanced visitor experience in a prestigious public events venue
• Modern, aesthetically pleasing design aligned with historic surroundings
• Faster, data-driven maintenance through IoT-enabled asset tracking
• Reduced blockages and fewer reactive call-outs
• Retrofittable system suitable for heritage and high-footfall buildings
• Lower downtime during busy conferences, weddings and civic functions
• Improved staff wellbeing and cleaner washroom environments
• Supports audit-ready facilities management and compliance reporting