Walk onto the executive floor of any REIT, and you’ll find people arguing about cap rates, HVAC optimisation, agentic AI, and the CAM reconciliation that’s three weeks late. You will not find anyone arguing about urinals.

That is a mistake, and the numbers say so. With around 56 million urinals in non-residential settings in the United States alone, on the order of one million litres of urine is splashed onto the floor daily, not because of user error, but because of geometry. The urinal in Marcel Duchamp’s 1917 art piece “La Fontaine” would not look out of place in a modern restroom. A century of building science has upgraded everything around it sensor faucets, low-flow valves, touchless dispensers and left the one surface that actually receives the liquid untouched.

The consequences are measurable. Urinal surfaces carry significantly higher bacteria concentrations than traditional toilets, with the surrounding floor highest of all, and ammonia levels on the floor around a urinal run roughly 100 times higher than any area near a toilet. Every stray litre becomes a mop pass, a chemical purchase, a corroded grout line, an odour complaint, and, eventually, a five-figure restroom renovation. It is one of the largest drivers of your janitorial contract and one of the most common grievances in your tenant surveys, and almost nobody has ever put it on a dashboard.

The Nautilus, nicknamed the “Nauti-loo”, is a urinal design developed at the University of Waterloo’s Department of Mechanical and Mechatronics Engineering. Long and sleek, it nearly eliminates splatter on floors, pants, and shoes by ensuring the angle at which a stream hits the wall doesn’t exceed about 30 degrees, a threshold determined through theoretical modelling and validated by physical experiments. At that shallow angle, the liquid stops rebounding and instead forms a smooth wall film that drains away.

The peer-reviewed study, published in PNAS Nexus in April 2025, lists Kaveeshan Thurairajah as lead author alongside Xianyu (Mabel) Song, J D Zhu, Mia Shi, Ethan A. Barlow, Randy C. Hurd of Weber State University, and corresponding author Dr. Zhao Pan. Thurairajah, now a PhD student in mechanical engineering, was still an undergraduate when he spearheaded the study and presented early findings at a U.S. conference in 2022; the prize-winning team also includes Dr. Tadd Truscott of King Abdullah University of Science and Technology, and more than a decade of on-and-off research fed into the final design.

Start with what happens to any liquid jet. Given enough distance, a stream breaks up into droplets through the Rayleigh–Plateau instability; in the team’s tests, the median droplet diameters ranged from 4.4 mm to 7.2 mm. By the time it reaches a urinal wall, you are no longer dealing with a stream but with a train of fast-moving drops carrying real kinetic energy.

What happens next depends on the angle of impact. Hit a hard surface close to perpendicular, and each droplet shatters on contact, throwing off satellite droplets that ricochet onto the floor, the partition, the user’s shoes and as aerosol into the air. Hit the same surface at a glancing angle and surface tension and viscosity win: the droplet spreads instead of shattering, and the liquid glides along the wall as a thin film. The team’s model predicts that at a 30-degree impinging angle, splash is reduced by about 95% from maximum, and that this inflection point is almost invariant across the range of conditions found in human urination.

The engineering problem, then, was spatial. A flat plate tilted at 30 degrees would work, but only for one user height and one trajectory. Real restrooms serve children, adults, and wheelchair users, standing at different distances and aiming at different points. Thurairajah’s team reframed the question as an isogonal curve problem: find a curve that intersects a family of stream trajectories at a constant angle, and solving the resulting differential equations in the top-view plane produced logarithmic spirals, the same curve found in a nautilus shell.

The team built and tested two prototypes. Both the Cornucopia and the Nautilus keep impinging angles at or below 30 degrees across their entire surface, and experiments showed they can reduce splashback to only 1.4% of the splash of a common contemporary commercial urinal. Under the high-splash conditions where conventional fixtures perform worst, the Nautilus achieved 85% and 95% reductions; by contrast, a contemporary commercial urinal throws droplets roughly half a meter to either side.

The Nautilus won on the criteria that matter to a facility manager. Its low lip, between 430 mm and 140 mm off the floor, makes it accessible to users of all heights, including wheelchair users, exceeding accessibility standards that require a lip no more than 430 mm high; its larger open area makes cleaning significantly easier; and because it tolerates poor aim, it may prove useful on aircraft and boats. Physics got the team to a splash-free surface; industrial design got them to a product a building could specify.

One more detail matters for procurement: the improvement comes solely from geometry, requires no expensive or complicated coatings, and is compatible with conventional materials.

Facility teams have fought splashback for decades with screens, mats, and behavioural tricks. Screens and mats catch splash rather than prevent it, with no published data on their effectiveness; and the famous fly sticker at Amsterdam’s Schiphol Airport produced a reported 50–80% reduction in splashback and an 8% cut in cleaning costs a reduction, not an elimination. The fly is a nudge; the Nautilus is a law of physics. Nudges depend on the user. Geometry doesn’t.

The Ig Nobel Prizes, organized by the magazine Annals of Improbable Research, honour research that first makes people laugh and then makes them think. This year’s ceremony marked a historic shift: after 35 years in the United States, the awards moved to a convention centre in Zurich, Switzerland, amid concerns about attendees getting visas, and the 2027 ceremony is already booked for Antwerp. Real Nobel laureates Esther Duflo, Abhijit Banerjee, Michel Mayor and Tim Hunt handed out the prizes on September 3, 2026.

The Waterloo team won the Physics Prize for their “theoretical and experimental attempts to design a splash-free urinal.” They wore yellow raincoats as couture at the ceremony and collected the traditional foot-mushroom statue and a ten-trillion-dollar bill from Zimbabwe, worth 15 to 30 Canadian dollars. Back in Waterloo, the professor and student had celebrated the news by sipping blueberry wine from espresso cups in Pan’s office.

The comedy is the point; so is what sits underneath it. Thurairajah described the prize as a symbol of learning things for their own sake: even if it seems silly, “it’s beautiful to know about how the world works.” Pan, for his part, has argued that without physics and math you cannot design even a humble urinal and that a pinch of art and humour makes ordinary life a little better.

For anyone who manages buildings, the beauty is in the budget.

Take the joke out and what’s left is a cost model. Splashback drives expense through four channels at once:

1. Custodial labor. High-traffic men’s restrooms are serviced on accelerated cycles, and a disproportionate share of each visit is spent on the floor and walls around the urinals rather than the fixtures themselves.

2. Consumables and chemicals. Uric acid crystallizes as puddles evaporate, and the odor drives recurring purchases of caustic cleaners, enzymatic sprays, deodorizing blocks, and disposable mats.

3. Accelerated capital expenditure. Urine is corrosive. Repeated wetting and drying cycles push salts into grout lines and past waterproofing membranes, delaminating tile and degrading subfloor. Restrooms that should last a decade end up in the renovation queue early, and a full gut renovation of a commercial restroom runs well into five figures before you count the disruption of closed facilities.

4. Work orders and complaints. Odor and wet-floor tickets are a perennial top category in office and retail CMMS logs, and every ticket carries dispatch overhead.

The researchers put a Canadian number on it. Using Toronto subway data, they note the TTC was projected to spend an annual average of $122,418 CAD per bathroom on cleaning alone from 2020 through 2024, and estimate that up to around $10,000 CAD per bathroom could be saved annually. That’s transit-grade traffic. Here is what the same logic looks like for a typical commercial asset:

A worked example. Take a Class-A office building or suburban mall with 40 urinals. Assume custodial staff spends four minutes per fixture per day on splash-related cleanup. That is 160 minutes, about 2.7 hours every day. At a fully loaded contractor rate of $28 an hour, the routine costs roughly $27,000 a year, and it exists only because liquid escaped a basin it was never supposed to leave.

Eliminate 75% of that work, and you free up about $20,400 a year in operating expense. Because commercial assets are valued as Net Operating Income divided by the cap rate, $20,400 of recurring NOI at a 6.0% cap rate translates into roughly $340,000 of asset value before counting chemical savings, deferred CapEx, or reduced ticket volume. Multiply that across a 50- or 100-property portfolio, and the ceramic fixture becomes a seven-figure decision.

In a post-pandemic market, physical space has to justify its existence. Office landlords compete against the kitchen table; shopping centres compete against a phone. Both win or lose on the quality of the in-person experience, and few things undercut a premium environment faster than a restroom that smells, feels sticky underfoot, or shows visible splatter around the fixtures.

In retail, restroom cleanliness is one of the most reliable predictors of dwell time and brand perception; a bad washroom in a luxury centre reads, subconsciously, as bad management everywhere else. In the office sector, tenant satisfaction surveys consistently rank restroom condition alongside temperature as a top workplace grievance, and unlike temperature, it is a grievance the landlord fully controls.

Thurairajah framed it in human terms: if the team can make bathrooms and public spaces more inviting, “that’s, like, a good thing for society.” For a landlord, the same sentence reads: more inviting facilities, higher retention, stronger asking rents.

Sustainability frameworks LEED, BREEAM, and WELL now shape tenant leasing decisions and institutional financing terms, and restrooms carry an awkward contradiction. Low-flow and waterless urinals cut potable water use, but with less flow to carry residue away, they often worsen odour and crystallization. Facility teams compensate with hot-water mopping, disposable mats and harsher chemicals, quietly undoing the gain the fixture was installed to deliver.

Containing splash at the source resolves the paradox. The researchers estimate that if the Nautilus replaced the 56 million non-residential urinals in the U.S., and cleaning consumes ten times the volume of splashed urine, it could save up to 10 million litres of fresh water a day. Add the disposable mats that never need to be bought, the quaternary ammonium compounds and bleach that never reach the sewer, and the aerosolized droplets that never degrade indoor air quality, an audited parameter under the WELL Building Standard.

A low-flow valve is an ESG line on a spec sheet. A fixture that stops the mess before it starts is an ESG outcome.

Here is the uncomfortable truth about physical innovation in real estate: a better fixture alone does not move NOI. Savings that are never measured never make it to the valuation model. The second half of the Nautilus story is digital.

At Assetsoft, we spend our days inside real estate's operational systems implementing and integrating Yardi Voyager and MRI Software; building automations with UiPath and Power Automate; and wiring Power BI to the data that actually runs a portfolio. When a client installs splash-free fixtures, the questions we help answer are the ones that turn a nice idea into a documented return:

• Is the labour saving real? Tag janitorial time and consumables in the CMMS by restroom and fixture class in Yardi Facility Manager or MRI X, so the before-and-after is a report, not an anecdote.

• Are cleaning schedules responding to reality? Occupancy sensors feeding the work-order system let cleaning cadence follow foot traffic instead of a fixed clock.

• Does finance see it? Vendor invoices, work orders, and property-level cost codes need to move between systems without manual keying. Working with integration partners such as KriyaGo, we connect the CMMS, the ERP, and the bank so the savings reconcile automatically and show up in the numbers finance actually reports.

In our world, the equivalent of fluid splashback is data splashback: the manual keying error, the unreconciled work order, the misallocated CAM charge, the broken handshake between two systems that should have talked to each other. It splatters drag across finance, leasing, and operations, and people spend hours every week mopping it up.

What the Waterloo team did with porcelain is what a good systems team does with an ERP, and the principles are identical:

1.Reject the default. A fixture, workflow, or report having worked “that way” for a century is not evidence that it is optimized.

2.Consult the mathematics. Solutions built on measured data and modeled behavior beat cosmetic tweaks and nudges every time.

3.Design for reality. Real users vary in height and trajectory, or in how they key an invoice. The system has to absorb that variance, not assume it away.

4.Capture compounding margins. Four minutes per fixture or thirty seconds per invoice is trivial once and transformative at scale.

The coverage has been global, which tells you the pain point is too. CBC Radio’s As It Happens interviewed Thurairajah on the research and the Zurich ceremony, and CBC’s The National featured him in a video segment.The Guardian covered the laureates in the UK; PBS NewsHour, Scientific American and the Daily US Times covered it in the United States; and the fluid-dynamics community’s own outlet, FYFD, walked through the physics. The University of Waterloo profiled the team in Waterloo News and on the MME department site, and the underlying study is open-access in PNAS Nexus.

The Ig Nobels promise to make you laugh first and think second. The Nautilus delivers on both: it is funny that a seashell fixes the men’s room, and it is serious that a hundred-year-old ceramic default has been quietly draining operating budgets the entire time.

Optimization happens at the margins. The owners who outperform on NOI over the next decade will be the ones willing to question every layer of their operating model: the fixtures, the data pipelines, the maintenance logs, the manual processes everyone else takes for granted. That is exactly where the untapped value is sitting.

Ready to find the splashback in your operations? From tuning your Yardi or MRI environment to automating reporting, integration, and reconciliation, Assetsoft engineers the digital layer that turns physical improvements into measurable returns. Talk to our real estate technology consultants.