From the smallest private pool to the largest leisure complex, you need to meet regulations
for water quality and make sure that your pool users are safe and comfortable in the water.
Chloramines in your pool water can cause unpleasant smells and even allergic reactions.
Hanovia UV systems destroy them as well as dangerous waterborne micro-organisms
including Cryptosporidium and Giardia. Your pool users will enjoy fresher-smelling, clearer
and more hygienic water, while you enjoy the reliability and effectiveness of a highly efficient
water treatment system.
A superior solution that guarantees high quality pool water. The benefits of Hanovia’s UV treatment system are far-reaching:
• Destroys chloramines – easily meets statutory
combined chlorine levels and typically reduces levels
to less than 0.5ppm
• Effective against all micro-organisms, including the
chlorine-resistant pathogens Cryptosporidium and Giardia
• Improves water clarity
• Treats full recirculating flow
An energy efficient and environmentally
• Reduces the need for dilution
• Cuts the use of chemicals and avoids the need for routine
shock dosing with chlorine
• Reduces requirement for free chlorine residual
• Creates no hazardous by-products
• Reduces corrosion of steel structures – minimising
• Cuts your use of chemicals
• Requires little maintenance
• Reduces energy bills if you use the Power Switching option
• Reduces water bills, as there is no need to control combined
chlorine levels by dilution and back-washing
• Avoids repair and replacement costs from chemical wear
and tear on pool fittings
Attractive pool environment
• Increases bather and employee comfort
• Appeals to new customers and visitors and enhances
• Competitive advantage compared to other local
Two ways that UV improves pool water
Chloramines are the unpleasant chemicals formed when
chlorine combines with the nitrogenous compounds (uric acid,
urea, ammonia, histidine and creatinine) introduced by bathers.
They are responsible for eye irritation, headaches, unpleasant
odours and occasional skin irritation, particularly in indoor
pools. Swimmers, lifeguards, instructors and coaches can all
be affected. Chloramines also damage the structure of the pool,
corroding structural steel and roof supports.
UV treatement is a high performance alternative to superchlorination
(or “shock” dosing), dilution with fresh water
or activated carbon. Low pressure UV lamps are not effective
against all chloramines. Hanovia’s medium pressure UV lamps
break the bonds within chloramine molecules and destroy
them. The lamps’ polychromatic spectrum includes the optimum
wavelengths for chloramine photolysis.
Monochloramine (NH2Cl): 245 nm
Dichloramine (NHCl2): 297 nm
Trichloramine (NCl3 ): 260 nm and 340 nm
The polychromatic spectrum of Hanovia medium pressure
lamps includes all these wavelengths. The monochromatic
UV emission of low pressure lamps at 253.7 nm will not be
absorbed by dichloramine or trichloramine molecules and no
photolysis of these compounds will occur.
Disinfects and clears comprehensively
The disinfecting power of Hanovia UV means you can drastically
reduce residual chlorine levels to as little as 0.5 ppm. Organic
molecules in the pool water are oxidised, for noticeably
improved water clarity.
Even chlorine-resistant pathogens like Cryptosporidium and
Giardia are effectively treated with UV. Cryptosporidium is
responsible for hundreds of thousands of outbreaks of gastric
illness every year, with outbreaks often traced back
to swimming pools. It is a parasite whose structure makes
it resistant to chlorine disinfection. Using Hanovia UV
technology you can reduce its presence in your water
by 99.99%, according to the United States Environmental
Eighteen outbreaks of Cryptosporidiosis associated with swimming
pools are known to have occurred in the UK between 1989 and 1999.
In the USA from 2003 to 2004, Cryptosporidium was responsible for
55.6% of gastroenteritis outbreaks associated with swimming pools.