Pure Water | Home Dialysis Water
Make the water where the patient dialyzes
Home dialysis still depends on fluid that's made in a plant, trucked to the door and stacked in a spare room. The WaHa Vaporator® makes consistent water from the air inside the home, so a dialysis partner can make fluid on site and drop the delivery route.
The WaHa Vaporator® is an atmospheric water generator that a dialysis device company can build into a home dialysis system. It produces consistent, distilled-grade water from the surrounding air, with no tap connection and no fluid deliveries. The dialysis partner treats that water, adds the chemistry that turns it into dialysis fluid, and owns the medical device, the clinical product and every regulatory approval. WaHa supplies the water source and makes no claim that its output is dialysis fluid.
The problem
Home dialysis runs on a supply chain
Peritoneal dialysis moves treatment out of the clinic, but the fluid still comes from a factory. A truck typically brings a month of supplies at a time, and according to Home Dialysis Central's patient guide, that means storing "30 or so fluid boxes that are each about 1 by 2 feet." They're heavy, they have to stay dry, and in a small city flat there's often nowhere good to put them.
The shift to home care makes the load bigger. In 2019 the US Department of Health and Human Services' Advancing American Kidney Health initiative set a goal that 80 percent of new kidney failure patients would dialyze at home or receive a transplant by 2025. Every patient who moves home adds another delivery stop and another stack of boxes, and in regions where the municipal supply isn't reliable, making dialysis water from the tap isn't a fallback anyone wants.
How it works
How does a dialysis system get water from the air?
The WaHa Vaporator® pulls water vapor from the room's air with a desiccant wheel, then releases it inside a sealed chamber, isolated from the ambient air stream, where a thermodynamic engine condenses it. What comes out is distilled-grade water. It's the same water in a flat in Dubai as in a house in Minnesota, because it doesn't start from anyone's tap.
That consistency is what a dialysis partner needs from a source. The partner's own system does the medical work: it filters the water, adds the chemistry and makes the fluid. WaHa's job is to hand that system the same input every day, wherever the patient lives.
The platform is configured for the site. The desiccant wheel is matched to the local humidity profile, and it holds rated output down to 10 percent relative humidity, so a dry climate doesn't mean a dry day for the patient. The desiccant itself is a novel solid desiccant: a MOF, built on the MOF chemistry awarded the 2025 Nobel Prize in Chemistry.
The economics
The expensive part is moving the fluid
Making water isn't the hard part of home dialysis. Delivering it is. Fluid made centrally has to be packed, shipped, carried in and stored, month after month, for every patient on the program, and the cost of that route grows with each new home.
When the water is made at the point of care, the partner's home system needs power and consumables in place of a fluid delivery. That changes what the partner is running: a device fleet to service, where today there's a logistics network to feed.
No water deliveries
The water comes from the room's air, so the truck and the spare-room stack drop out of the water side of the supply chain.
No tap, no plumbing
The unit needs no water line and no connection to the home's supply, which also means it doesn't inherit that supply's quality problems.
No chloramine to strip
According to Home Dialysis Central, home dialysis water has to be checked for chlorine and chloramine before every treatment. Water made from air never passes through a utility treatment plant, so there's no disinfectant added to it in the first place.
Fits the home service visit
Three consumables (air filters, water filters and a UV lamp) and no membranes or brine to manage. Any HVAC technician can service it, so it folds into the equipment service a home program already runs.
Adoption
Built for device partners
WaHa doesn't sell to patients and doesn't make dialysis fluid. We work with dialysis device and therapy companies that want an independent water source inside their home systems. The partner sets the spec, owns the clinical validation and the regulatory path, and decides how the unit fits into the product.
The first step is a joint site evaluation: agree the daily volume the modality needs and the home climates the product has to cover, then measure the unit against both. If you're building or running a home dialysis program, we'd like to start a measured pilot with you.
Where it applies
Where on-site water makes the most sense
Peritoneal dialysis at home
The strongest fit. Daily fluid volumes suit a home-sized unit, and removing the monthly fluid delivery is the whole point.
Small city apartments
Where a month of boxes has nowhere to go, a compact unit that makes water in the room frees up the space.
Unreliable municipal water
In places where the tap can't be trusted or goes off, an independent source keeps home treatment possible.
Remote and rural patients
Long delivery routes are slow and costly to serve. Water made on site takes the patient off the route for the water component.
Storms and water outages
According to Healio, Texas regulators counted 1,445 public water systems disrupted by the February 2021 winter storm, and one large dialysis provider brought in water trucks. A source that doesn't depend on the main keeps running through a boil-water notice.
Home hemodialysis, selectively
Today's home machines make dialysate from tap water plus concentrate, so they're only as dependable as the tap. Sessions use far more water than PD, and where clean tap water is plentiful, reverse osmosis is the cheaper answer. Where it isn't, there's a case worth evaluating.
Measured on pilot machines in the field
Our technology is protected in depth: explore the WaHa patent portfolio.
Questions operators ask
Home Dialysis Water FAQ
Does WaHa make dialysis fluid?
No. WaHa makes the water. A dialysis device company builds the WaHa Vaporator® into its home system, then filters the water and adds the chemistry that turns it into dialysis fluid. The partner owns the device, the fluid and the regulatory approval.
Is water from the WaHa Vaporator® dialysis-grade?
WaHa doesn't claim that. The output is distilled-grade and has been independently tested against US EPA, UAE.S 149 and GSO 149 drinking water standards. Dialysis water standards such as ISO 23500 apply to the partner's finished system, and meeting them is part of the partner's validation.
Will it make enough water in a dry climate?
The desiccant wheel is matched to the site's humidity profile, and the WaHa Vaporator® holds rated output down to 10 percent relative humidity. That's well into the range where compressor-based water generators struggle. A partner's site evaluation confirms daily volume for the climates its product has to cover.
Does the unit need a water line or plumbing?
No. It makes water from the air in the room and needs only power. There's no tap connection and no water line to install. That's part of why it suits apartments and homes with unreliable municipal water.
Who can buy a WaHa unit for home dialysis?
Dialysis device and therapy companies. WaHa doesn't sell to patients for dialysis use. If you're a patient, your care team and dialysis provider are the right people to talk to.
Pure Water. Inexpensive Dry Air. Anywhere.
For dialysis device and therapy companies: talk to us about putting an independent water source inside your home dialysis program.
Start a measured pilot