Cost Comparisons
Ultraviolet light vs Ozone - The true costs
The following table illustrates the difference in purchase and running costs of UV sterilisation and ozone treatment based on a typical 25 meter exercise pool (450 m³ volume, 2 hour turnover, high peak bather load).
| Item | Description - Ozone plant | Cost - Ozone | Description - UV plant | Cost - UV | UV saving |
|---|---|---|---|---|---|
| Capital Costs | £ | £ | £ | ||
| Equipment | Ozone Generator Unit | 10,000 | Top spec, fully automatic with wipers, strainer, monitor and full controls | 23,500 | |
| Filters, mixer vessels degasser etc | Say, 2x2.4m dia vessels + mixer vessel | 22,500 | Not required | 0 | |
| Installation, labour & fittings | Extra for ozone plant | 7,500 | Simple 3 valve bypass system only | 4,500 | |
| Plantroom space. Footprint area. | Overall area required: 2 x vessels - 15 m², ozone generator 6 m², mixer pumps and pipework 5 m² | 13,000 | Equipment footprint = 1.7x0.6 m, allow 3.5 by 1.1 meters for full access | 1,925 | |
| Safety detector | Ozone detector - ozone very poisonous, 0.1 PPM maximum safe level | 2,000 | No health risks associated with UV | ||
| Total Capital Costs | 55,000 | 29,925 | CAPITAL SAVING 25,075 | ||
| Item | Description - Ozone plant | Cost - Ozone | Description - UV plant | cost - UV | UV saving |
| Operating Costs | |||||
| Power | Typical consumption inc pumps 10kW | 2,700 | 2.2 kVA | 600 | |
| Annual maintenance costs inc spares | Typical annual contract costs, inc dielectric tubes from major supplier | 5,500 | Service contract inc lamp replacement as required, seals and labour | 2,750 | |
Ozone detector recalibration | 500 | n/a | 0 | ||
| Filter vessels | Epoxy lining £15,000 every five years | 3,000 | n/a | ||
| Filter vessels | Carbon replacement, £4,000 every five years | 800 | n/a | ||
| Chemical savings | Deozonisation carbon removes free chlorine - extra chemical use | 1,000 | |||
| Total operation costs | 13,500 | 3,350 | SAVING PER YEAR 10, 150 |
Please note that only full flow systems of each type are compared. Slipstream or bypass systems, which cannot provide primary disinfection are not considered suitable for professional systems.
