A Working Lab · Sven Hultins plats 5
Less water.
Lower energy use.
At A Working Lab, Akademiska Hus and Vyse tech are testing local water heating with lower flow rates. Ten installed units provide data on usage and the potential to reduce water and energy demand.
A pilot to learn from together10 installed unitsNozzles rated at 1.3 or 1.9 l/minOngoing pilot with data collection
Pilot results · 20 May–14 September 2026Final, static summary of the pilot measurement period.
Measurement period: 20 May–14 September 2026. The estimated water saving of 8.2 m³ applies to this period.
Same usage · lower flow
The difference in water volume.
Before and after are calculated for the same time per handwash in the pilot data.
76 %less water
Estimated savingsRemaining volume
Annual potential · all of A Working Lab · 47 washbasins
84% lower energy demand
A calculation for the entire building indicates potential savings of 10.2 MWh per year with a complete replacement.
How we calculate · pipe losses and assumptions
The annual calculation is extrapolated from 10,800 washing events till cirka 324,000 washes per year för byggnadens 47 tvättställ. Kalkylen använder ett avrundat snitt av vinter- och sommarveckor och tar hänsyn till lägre aktivitet under semester och jul.
The system energy saving includes assumed avoided losses in hot-water and circulation pipes, distribution pipes and pumps. The saving requires the corresponding distribution system to be decommissioned with a complete replacement. For the pilot use, the comparison excluding distribution gives 76% lower energy demand.
Price assumptions: district heat SEK 0.81/kWh · solar electricity SEK 0.10/kWh · water SEK 30/m³. With purchased electricity at SEK 0.71/kWh, the estimated saving is approximately SEK 15,800 per year. Investment, servicing and new solar or battery installations are excluded.Voices from the pilot
What do users think?
From the user survey“A slightly lower flow than you are used to. But it actually wasn't a problem.”
“Much better than I expected. I thought that the low water flow would be annoying but it was not.”
“The water has perfect hand washing temperature.”
Comments from the pilot's user survey. Translations and excerpts are identified below each quote.
Lower flow makes a difference
Lower flow reduces both water volume and the amount of water that needs heating, every time the tap is used.
Insights for more properties
The pilot tracks everyday use. More detailed session data will enable better comparisons of energy, temperature and comfort, helping inform potential installations at other properties.
Your property could be next
Could this work in your property?
Talk to Andreas about the experience at A Working Lab, or to Simon about the solution and opportunities to try it at other Akademiska Hus properties.
+46 72 201 71 06
+46 70 924 15 31