This post contains no prices and no wattages, and that is deliberate — but not because the figures do not exist. Our ROI calculators size a system from your inputs and print an indicative installed cost and a connected load in kilowatts, off an internal wholesale price sheet. What those pages carry that this one cannot is the rest of the sentence: the inputs behind the figure, the statement that indicative pricing is never a quotation, and the disclaimer that travels into the printable report. Lift a number out of that frame and it arrives with none of that attached — which is how a "from" price becomes a quotation in someone's memory and then a dispute at the invoice.
What can be published is the structure: which variables move the price, which move the power bill, what the service obligation is, and how to assemble a payback model that survives a lender's questions. A reader who knows what drives the cost can get a real number out of any vendor in one email, including us.
What drives the capital cost of a nanobubble system?
Capital cost is driven by flow rate first. The injector and pump are sized to the volume of water treated per hour, and price climbs with that number rather than with acreage. Gas source is the second driver, since an on-site concentrator costs more to buy than bottled gas. Wetted materials are the third.
Flow rate is the variable to fix first, because it sets every other line. A nanobubble system treats a stream, not an area, so the question is not how many acres or tons of fish, but how many liters per minute pass through the injector. Two operations of identical size can need very different machines if one treats its full irrigation flow inline and the other treats a holding tank on recirculation between sets. The second is often much cheaper, and working that out is a design decision, not a procurement one.
Gas source is the second fork, and it is a capital-versus-operating trade rather than a straight cost. Bottled or bulk oxygen is cheap to install and becomes a permanent delivery line item. A pressure-swing adsorption concentrator makes oxygen on site from ambient air, costs more up front, and turns a recurring gas bill into an electricity bill. Which wins is a site calculation, turning on duty cycle and the local price of delivered oxygen.
Materials are third, and the water decides them rather than the budget. A cavitation injector runs a high-velocity, high-shear stream; if it carries chlorides, brine, or abrasive solids, the wetted path has to be specified accordingly, and that moves the price. Then there is the part vendors leave off the datasheet and the buyer pays anyway: the pad, the power drop, the plumbing tie-in, the enclosure, and the installation labor. Our deployment page sets out what a site must have ready, and every item is a cost.
What does it cost to run?
Running cost is the circulation pump plus the oxygen concentrator, multiplied by how many hours a day the system runs. Duty cycle usually matters more than nameplate draw. Our ROI calculators print a connected load in kilowatts for the system they size; this page does not, because a wattage means nothing apart from the machine and assumptions behind it.
The structure of the bill is simple enough to hold in your head. Pump power is set by flow and by the pressure differential the injector needs across it, divided by pump efficiency. Concentrator power is set by the mass of oxygen produced per day, not by the size of the water body, because a pressure-swing unit spends its energy separating nitrogen out of air. Add the compressor and any dryer feeding it, and that is the electrical load.
Duty cycle is where the spread lives, and it is the number vendors are least likely to volunteer. The same hardware on a continuous recirculation loop and on two irrigation sets a day produces power bills that differ by a large multiple, and a nameplate figure alone cannot distinguish them.
An energy claim that does not state the assumed hours of operation is not a claim about cost.
So the arithmetic to run is: nameplate draw of each component, times the hours it actually runs, times your tariff. Ask for the first two in writing and supply the third yourself. That is a defensible operating cost; a number quoted off a brochure is not. The classroom section on gas protocols covers how oxygen supply choices interact with the rest of the process.
What maintenance does it need?
Maintenance is biannual service on the pumps and the oxygen generators, performed by certified technicians. Warranty runs 3-yr on non-moving parts and 1-yr on moving parts, which tells you where the wear sits: seals, pump bearings, and the sieve beds inside a concentrator. Ask any vendor which consumables fall outside that warranty.
Read the warranty split as an engineering statement rather than a commercial one. The nozzle, the body, and the plumbing have no moving parts and cover a longer term. The pump and the concentrator do, and they carry the shorter one.
That asymmetry tells a buyer where to expect a bill: rotating equipment and the air-separation stage, not the cavitation hardware.
Service cost does not appear here either, for the same reason and for a second one. The calculators carry it as an assumption you set — an annual percentage of equipment cost — not as a price, because a visit in California and one a long drive from the nearest certified technician are different numbers, and travel dominates. A published average would be wrong at most sites, in a way the site could not detect.
What a buyer should extract instead is the obligation. What is covered in a biannual visit and what is billed on top of it. Who is certified, where they are based, and the response time when a pump fails mid-season. Which consumables are on a replacement schedule, at what interval, and whether they sit inside or outside the warranty. Those answers cost a vendor nothing and matter more than a price, because they are what a downtime event turns on.
How do I build a payback model?
A payback model divides installed capital cost by annual net benefit. Net benefit is the output delta credited at contribution margin rather than revenue, minus the change in power, maintenance, and consumable cost. Kairospace models payback at under one year on its own field data; run the arithmetic on your own numbers instead.
Three disciplines separate a model a lender accepts from one that reads as a sales sheet.
- Credit at contribution margin, not revenue. Additional tonnage carries additional harvest, handling, and freight, and crediting the gross price books a margin that never existed.
- Cost the whole installed system. Pad, power, plumbing, labor, and freight — not the equipment line.
- Net the operating change on both sides. Added electricity and service, less any input, gas, or energy cost the system displaces.
Then run it on conservative inputs before optimistic ones. Our ROI calculators are built that way on purpose: they open on a conservative preset, they credit output at contribution margin, they cap what the equipment can physically reach, and where the published literature is negative on a lever they say so on that lever rather than leaving it out. They also carry the full disclaimer in both the tool and the printable report, so the document that travels to a bank never says more than the page it came from.
Our own model, run on our own field data, returns payback under one year. Treat that as what it is — a modeled result standing on our measurements, not a measured payback at your site — then displace our assumptions with yours: your crop price, your yield baseline, your tariff, your acreage. If the answer only works on our numbers, it is our answer, not yours.
Notice where that leaves the two halves of the division. The calculators show both — an indicative installed cost in the ledger, a payback below it — because there each carries the inputs behind it and the disclaimer governing it. On a page that can carry the conditions of neither, the same arithmetic means nothing.
One structural limit is worth knowing. Anything beyond two oxygen concentrators stops being a catalog assembly and becomes an engineered package. Our wastewater calculator says so outright rather than extrapolating a price into territory nobody has quoted: past two units it prints no price, answers at the share of demand two units can supply, and names what the whole plant would need. If your demand is larger than that, the model you need is an engineering estimate, not a web page.
What should I ask a vendor for?
Ask a vendor for nameplate power draw at rated flow, the duty cycle behind any energy figure, the warranty split between moving and non-moving parts, and the service interval with who is certified to perform it. Ask for dissolved oxygen measured at the point of use, and for a written quotation rather than indicative pricing.
Add four more, because they are the ones that separate a specification from a brochure.
- Bubble size distribution and particle count. Measured on water like yours, with the instrument, the date, and whether the sample was diluted stated on the report — a count without a dilution record is a floor, not a value.
- Provenance of every figure. Which come from their own field measurement, which from published research, and which from a third-party laboratory; treat any number that cannot answer as unsourced.
- What the system does not do. Be suspicious of a short answer.
- A reference site on comparable water. Then call it without the vendor listening.
Indicative pricing is a planning figure that moves with payment terms, dealer of record, installation scope, site conditions, freight, and taxes; only a written quotation binds anyone to anything. That distinction is ours as much as anyone's, and a vendor who blurs it is selling a number rather than a system.
The reason to put the burden on the vendor is that they are the only party who can carry it. A buyer cannot verify a wattage from a web page, but can insist on one in writing, with the duty cycle beside it, and hold the invoice against it. That is a stronger position than any published range would have given them — which is the honest argument for a cost page that sends its figures to the tool able to carry their conditions rather than printing them bare.