A swimming pool costs money in six places: heating, circulation power, chemicals, make-up water, maintenance and labour, and the building around the pool. For most indoor pools the largest lines are heat and ventilation, not chemicals, which is why the chemical bill is the line buyers look at first and the one that rarely decides the total. NanoSWIM publishes no prices, so this article lays out the cost lines you control and shows where water treatment fits among them.
What Does It Cost to Run a Swimming Pool?
There is no honest single figure, because the answer depends on pool volume, indoor or outdoor, season length, how many bathers use it and how old the plant room is. What you can do is split the bill into lines and see which ones move when you change something.
| Cost line | What drives it | What you can change | Does water treatment touch it? |
|---|---|---|---|
| Heating the water | Pool volume, water temperature, evaporation, covers | Cover use, temperature set-point, heat recovery | No |
| Heating and ventilating the hall | Air volume, humidity, how much chloramine must be diluted | Ventilation strategy, water quality | Indirectly, through chloramine load |
| Circulation pumps | Flow rate, hours of operation, filter resistance | Pump sizing, variable speed, run hours | Only if flow rate is changed |
| Chemicals | Bather load, organic load, dosing regime | Dosing control, treatment method | Yes, directly |
| Make-up and backwash water | Filter type, backwash frequency, splash-out | Backwash control, filter condition | No |
| Maintenance and labour | Plant complexity, testing routine, consumables | Automation, logging, spare parts policy | Yes, in both directions |
Why Is Heating Usually the Biggest Line?
Water holds heat well and loses it fast to the air above it. An indoor pool is a large evaporating surface inside a building that must stay dry enough not to rot. So you pay twice: once to keep the water warm, and again to heat, dry and move the air in the hall.
The levers here are dull and effective. A cover at night cuts evaporation. A sensible water temperature set-point matters more than most operators admit. Heat recovery on the ventilation air returns energy that would otherwise leave through the roof. None of this is a water-treatment topic, and a supplier who tells you a treatment system will fix your heating bill is selling you something.
What Do Chemicals Really Cost, and What Else Do They Cost?
The invoice for chlorine, pH correction and delivery is easy to find. The indirect cost is harder to see. Free chlorine reacts with what bathers bring into the water and forms chloramines. Chloramines go into the air, and the ventilation system has to work harder to keep the hall comfortable. They also attack metal, sealants and swimwear over time.
That is where a treatment-loop technology can matter beyond the drum. NanoSWIM's published figure is up to 90% less chemical use against a conventional chlorine dosing regime on comparable pools. It is a technology figure, not a promise for your pool. The documented case is a 2,500 m² pool complex at a resort in southern Europe, where chlorine consumption fell by 85% and water-treatment operating cost by 60%. The client is not named, for commercial confidentiality, and the 60% applies to the water-treatment line only, not to the resort's total operating cost.
What Does Nanobubble Treatment Add to the Cost Picture?
Capital cost. It is higher than dosing pumps and chemical drums, and that is the honest starting point. Against it you set a smaller chemical spend, less chloramine for the ventilation to dilute, and consumables that depend on the unit. The technology page explains the mechanism; the cost question is simply whether the saving on the treatment line and the indirect lines outweighs that capital cost over the life of your plant.
A few conditions make the comparison fair:
- The system is installed inline in the existing circulation loop, after filtration, with no separate contact tank. Pool volume and flow rate decide which unit fits. The NanoSWIM Pool System covers up to 500 m³/h and up to 50,000 L of pool volume; larger sites are a different product.
- It is a treatment-loop technology. It acts on water passing through the plant and leaves no persistent residual in the basin on its own.
- A Norwegian public pool must generally keep a measurable disinfectant residual under forskrift om badeanlegg, bassengbad og badstu. The realistic outcome there is strongly reduced chlorine, not zero, so do not budget for a chlorine-free public pool. Private pools, hotel pools and spas can run genuinely chlorine-free; see what the chlorine-free option involves.
- It does not replace correct filtration, sensible pH control or competent operation.
Who Should Not Expect Savings From a Treatment Change?
If your chemical use is already low, your plant is well run and your hall air is fine, there is little for a new treatment method to save. Small private pools often fall here. If the real problem is a pool with no cover, a tired heat exchanger or pumps running flat out all day, fix those first. They will pay back more than any change to disinfection.
How Do You Build a Fair Cost Comparison?
Whether you compare NanoSWIM, UV, ozone or a conventional dosing plant, ask every supplier for the same inputs and the same assumptions:
- Pool volume, circulation flow rate and operating hours, written down once and used for every quote.
- The capital cost of the unit, installation and any plant-room changes.
- The expected chemical spend, with the assumptions about bather load stated.
- Consumables and service intervals, and who performs the service.
- The effect on ventilation and building wear, described honestly, including where the supplier cannot quantify it.
- What documentation and operating logs you will receive. NanoSWIM does not claim any certificate or approval, so ask every supplier, including us, what they can document.
For a side-by-side with the conventional option, the chlorine comparison lays out the differences, and the swimming pool application page shows where each product fits.
In my own experience, buyers open with the chemical bill, and I have learned to nod and wait. The conversation changes later, usually standing in the hall, when someone looks up at the ceiling fixings and the ventilation grilles and asks how long those have been that colour. That is the moment the real cost of the water shows up, and it is almost never on the chemical invoice. I will happily lose the argument about drums if we win the one about the air.
If you want a figure for the treatment line only, contact NanoSWIM in Bergen with your pool volume and flow rate. We will tell you honestly whether it fits and what it would cost against your own site.