Question #259

Can a greenhouse decide when to vent?

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ResearchWater

Project Cascade

Can showers dramatically reduce fresh water use while preserving the same experience?

Why does this matter?

A domestic shower is one of the largest single draws of treated drinking water in a home, and almost all of it leaves the building seconds after arriving.

What exists today?

Recycling showers exist in a handful of markets. They are expensive, need servicing, and are usually sold on virtue rather than on comfort.

What prevents it?

Water that has touched skin, soap and hair must be cleaned to a safe standard within seconds, at low energy, in a unit that fits a bathroom and survives years of neglect.

Why hasn't this happened?

CostEnergyMaintenanceRegulationHuman behaviour

Difficult problems stay difficult for reasons. Naming them is the first honest step.

What needs to change?

  • Better filtration at domestic flow rates.
  • Lower energy UV or equivalent disinfection.
  • Affordable cartridges with an honest lifespan.
  • Simpler maintenance a household will actually do.

Possible disciplines

FiltrationMicrobiologyMechanical engineeringSensingIndustrial design

Future collaborators

Water utilitiesHousebuildersFiltration manufacturersUniversities

Learning log

  • Reading

    Comfort is temperature, pressure and duration. Volume is a by-product, not the experience.

  • Bench

    Any system needing quarterly servicing is a system that gets bypassed in year two.

Research network

Nothing exists alone.

WaterEnergyMaterialsHealthHousingManufacturing

Related questions

  • Can affordable drinking water be produced almost anywhere?
  • Can a home explain its own water use?
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Our Promise

We don't claim to have the answers.

We promise to ask questions worth exploring, test ideas honestly, publish what we learn, and build practical prototypes where we believe they can make a meaningful difference.

Working on part of this problem? We'd rather collaborate than compete.

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