Leo Kankkunen

Atlantis - Future of Breath is in Water 🌎 Founder of @DAIVIN_TECH (YC W26)

[Leo Kankkunen @SE4LION]

Why tankless dive gear?

We built our world assuming air would always be there.
But in smoke, in toxic leaks, underwater, at altitude -
breathing becomes constrained.

It depends on tanks and their logistics.
And tanks run out, causing losses.

We are changing that.
Not carrying oxygen - but making it.

Read more: https://t.co/hAy67P63mk

#TOTHEHEROES that keep us safe!

#Diving #ycombinator #ycw26 #deeptech

@DAIVIN_TECH

[Leo Kankkunen @SE4LION]

There is a group of divers that most have never heard about -

Nuclear divers
Underwater welding
Critical infrastructure beneath the surface

In extreme environments, breathing stops being automatic.

It becomes infrastructure itself.

More at @DAIVIN_TECH

#diving #breathing

[Leo Kankkunen @SE4LION]

You notice bad air only when it becomes unbreathable.

Asphalt paving crews inhale fumes, VOCs, and ultrafine particles for hours every night.

Research continues to link long-term exposure to respiratory damage and cancer risk.

The future of infrastructure shouldn’t come at the cost of the lungs building it.

#asphalt #oxygen

[Leo Kankkunen @SE4LION]

Today 44,000 people evacuated in Orange County because one chemical tank started leaking.

One tank turned into a regional emergency.

Roads closed.
Airspace restricted.
People told to leave their homes because the air itself could become dangerous.

This is the hidden fragility of modern infrastructure.

We keep storing and transporting critical materials under pressure near dense populations.

DAIVIN’s long-term vision is the opposite direction:

Generate critical resources like oxygen on-site instead of moving heavy pressurized inventory through cities, tunnels, ships, hospitals, and industrial zones.

Less storage. Less transport. Less dependency on things that can fail catastrophically and cost more than just $. Everyone stay safe!

#orangecounty #emergency #cylinders

[Leo Kankkunen @SE4LION]

There is more potential here than people realize.

The next step is building with enough conviction for the world to eventually notice.

[Paul Graham @paulg]

It could actually be a significant problem that Europe doesn't have enough garages. This sounds like a joke, but I'm serious. Garages let you work on stuff that doesn't matter yet, which is how big things often start. The outliers of ideas need the outliers of space.

[Leo Kankkunen @SE4LION]

Those who know - know

[Leo Kankkunen @SE4LION]

Who knew tankless dive gear needs wood

[Leo Kankkunen @SE4LION]

Happy to see @DAIVIN_TECH electrolysis tech stack being mentioned in requests for startups for Summer 26 @ycombinator Batch - but this time for extracting metals on the moon! (P.S it also generates breathable oxygen as a byproduct!)

The team at @Starcloud_ is killing it! 🚀🔥

#electrolysis #metals #oxygen

[Leo Kankkunen @SE4LION]

When I went through @ycombinator W26 batch, @bryan_johnson Johnson came to tell us about importance of health that gets often neglected by us, and also it showed how slow the breakthroughs are in this field!

One thing that I realized the fact that how much of modern healthcare still relies on technologies that were invented 100 years ago! One example of such technologies is home oxygen concentrators!

1.5 million Americans are tied to a hose in their living room. Counting minutes left in a portable tank before they can leave the house.

And here’s the scam hiding in plain sight. Medicare pays $7,000 a year for a $500 machine to the supplier. Per patient. Forever.
Because lung damage doesn’t reverse people are tied to these machines for life.

1.5 million Americans. Over $10 billion a year.

And it’s getting worse. Pollution. COPD. Wildfire smoke. More people are being prescribed oxygen every year. Almost none come off it.

Go read r/COPD. Real people begging for equipment that hasn’t meaningfully changed since the 1980s.
The health revolution is real and more important than ever.

That’s why we’re building @DAIVIN_TECH to get rid of the bulky machines limiting peoples lives.

#oxygen #healthcare #ycombinator

[Leo Kankkunen @SE4LION]

$18,000. Just to breathe.

That’s what one COVID patient cost. Not the bed. Not the doctor. Not the ventilator.
Just the air.
Here’s why.
A ventilated patient burns 60 liters of oxygen a minute. 86,400 a day.
All of it from steel cylinders. 70 kg each. Two men to move one.
12 cylinders a day. 840 kg of steel rolled to one bedside. Every 24 hours.
$400–$1,200 a day. Over an 8–15 day stay: $3,200 to $18,000. Per patient.

Now scale it:
100 beds. 84 tons of cylinders moving through the hospital every day.
One truck carries 10 tons. That’s 8 truckloads. Daily.
$120,000 a day. A two-week surge? $1.7 million per hospital. Just for air.

Modern medicine runs on a 19th-century delivery model. Steel. Trucks. Schedules. Luck.
Delhi ran out. Manaus ran out. Italy, Peru, Egypt - all ran out.

We risk lives with cylinders and should prepare better for the worst - with water.

#hospital #oxygen

[Leo Kankkunen @SE4LION]

Underground data centers are already a thing.

Pionen White Mountains Data Center sits ~30m underground.
Lefdal Mine Datacenter runs inside a mountain.
Rock gives shielding. Stable temperature. Lower cooling volatility.

AI is pushing more infrastructure below ground.

Air isn’t free.

Underground you design it like power or cooling.
Ventilation becomes a system, not a given.
Pressurized cylinders at 200–300 bar start to look like a legacy workaround.

Closed environments tend to move toward on-site generation.

Water + power → oxygen.

Less stored pressure. More control.

Same shift pattern as compute: from centralized + transported → local + generated.

#ai #datacenter #oxygen

[Leo Kankkunen @SE4LION]

In late 2025, the U.S. passed a law recognizing cancers from smoke exposure as line-of-duty for firefighters.

That’s important, and it also highlights something most people miss.

In many fire environments, breathing support still depends on tanks.

Tanks give limited time.
Tanks are heavy.
Tanks run out.

So crews ration air, remove masks, or work in conditions where protection isn’t continuous to save lives! In wildland fires, many don’t even carry full respiratory systems because logistics make it impractical and hard.

That’s where the damage accumulates.

Not in one moment - but over years of exposure when the air isn’t fully protected.

Now imagine if there was no need for tanks and the same water used for extinguishing the fire could be used for breathing? Thats the future that will save many lives of heroic workers!

#firefighters #safety

[Leo Kankkunen @SE4LION]

YC batch has ended and we are flying to moon!🌖

One thing became very clear during YC:

We are still moving oxygen like it’s the 1960s.

At the airport I watched four people stand around my steel tank asking if it’s even allowed on the plane (although I paid for it). That tank costs a lot to move and gives roughly an hour of breath. On another flight I was already seated when I got asked if the tank was empty (while the tank was already in cargo)

That’s the system where transferring steel cylinder costs more than the cylinder itself. It almost damaged my Uber’s trunk so I had to hold it between my legs constantly - now imagine if it was full of pressurized oxygen…🔥🔥

In Texas, oil & gas operators told the same story. Helicopters flying tanks offshore. Expensive, slow, and always a dependency. Contaminated compressors in industrial settings causing lifelong neurological and physiological problems that people dont even know about.

Then I went to NASA in Houston 🚀

Same principle everywhere. Space missions, submarines — they don’t rely on endless tanks. They generate oxygen. The only constraint is energy. Thats how Artemis would breathe if they landed!🌖💧 From water!

We at DAIVIN! (YC W26) started from the hardest place: underwater.

Proving you can breathe without tanks.

Now it’s clear this doesn’t stop at diving.

Oxygen tanks are a logistics problem across multiple industries ($100B +) and something that needs to be brought to 21st century in terms of the technology!

Thanks to Y Combinator and everyone who believed in us!

We’re just getting started!

#artemis #space #breathing #electrolysis #moon #ycombinator

[Science girl @sciencegirl]

The amount of litter on Mount Everest

[Leo Kankkunen @SE4LION]

Beautiful day at alumni demo day!

@DAIVIN_TECH

#ycombinator

[Danny Chepenko @kidrulit]

non-consumer hardware represents ~15% of @ycombinator W26
hard-tech is back.

spacetech:
@axionorbital - Foundation models for 24/7 Earth Observation
@constspace - AI for space mission assurance
@gru_space - Building the first hotel on the Moon
@KytenTech - Custom battery packs for aerospace vehicles

defense:
@DroneTector Detect and track hostile drones
@S2_INC AI Drone Systems for Defence

robotics:
@GrazeMateInc Robot cowboys mustering cattle with AI drones
@Servo7Robotics Autonomous Warehouse Robots

manufacturing:
@DAIVIN_TECH Tankless dive gear for breath autonomy
@AurorinCAD Modern CAD for mechanical engineers
@SquidEnergy AI-powered grid planning

imo the most significant impact of YC's industrial push is drawing elite talent away from building another outbound tool or trading corn derivatives at a hedge fund and getting them excited about automating manufacturing again.

[Leo Kankkunen @SE4LION]

If you are at Alumni Demo Day or Demo Day at Y Combinator stop by our booth and come see the future of lungs from @DAIVIN_TECH !

(If you haven’t yet come and feel yourself how heavy the steel tanks are!)

😎🌊

#demoday #ycombinator

[Leo Kankkunen @SE4LION]

Article about @DAIVIN_TECH ! 🙏🌊

https://t.co/0dw818WjWx