Project Description

Cardiff University

McKenzie House

As part of Cardiff University’s initiative to reduce its water consumption across their portfolio, Propelair were asked to carry out a study of their toilets  at their administration building, McKenzie House, Cardiff.

Propelair showed the university how much water, carbon footprint and money they would save. So Cardiff University decided to replace all their toilets at McKenzie House with 40 Propelair units.

The 40 Propelair toilets installed bring huge environmental and cost saving benefits: annually Cardiff University saves 5,262,400 litres of water compared to before, equating to over £16k worth of water bill savings.


Metered Water Charge

Flushes per Day

Previous Flush Volume
13 litres

Annual Savings

131,560 litres


2.3 years

(All figures represent a single Propelair unit)


  • The installation of 40 Propelair toilets have achieved a 90% water saving
  • Annually this will save 5,262,400 litres of water (building utilisation = 260 days)
  • An annual carbon reduction of 5,482 kg


  • 5,262,400 litres of water saving = £16,366 reduction in water bills annually
  • Payback achieved in 2.3 years


  • Propelair’s unique displaced air technology efficiently removes all waste with one flush
  • Reduces airborne germs by up to 95%
  • Removes up to 99.9% of waterborne contaminants
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