66 Singlewell Road, Gravesend, Kent, DA11 7PW
Calorifier Descaling & Disinfection

While more difficult to access and clean than cold water systems, calorifiers will often pose a higher risk of Legionella growth.

Calorifiers & Direct Water Boilers

We often deal with calorifiers and direct water boilers where there is no record of cylinder inspection or descaling.

While there is a great deal of emphasis on the visible surfaces of cold-water tanks, the hot water system is often neglected, despite the clear guidance given by HSE. While more difficult to access and clean than cold water systems, calorifiers will often pose a higher risk of Legionella growth.

This is due to high levels of scale in a part of the system where water is at a temperature favourable to the growth of Legionella. Scale is deposited as water heats up, meaning that calcium carbonate will form on and around heat exchange surfaces. Signs of a hot water cylinder suffering from high levels of scale include a reduction to water flow, fluctuating and lower than normal water temperatures.

In the most extreme circumstances, a large build-up of thick layers of scale can all but seal off your water flow.

Our Service

Using a range of biocides and descaling chemicals which all comply with the latest HSE and ACOP L8 guidelines, Evolution Air & Water Hygiene Services can carry out a thorough cleaning and disinfection service to remove any sediment from the calorifiers which may have built up over time, the dirt that has built up inside the calorifier is a perfect environment for legionella growth.

To prevent this from occurring, our engineers can carry out an internal visual inspection of calorifiers with access hatches installed on them. Upon our findings, a report will be generated detailing any build-up of sediments, debris, scale, or corrosion which may taking place within the calorifier. Digital images will be taken, providing extra evidence of the internal condition and cleanliness of the vessel.

If there is scale which has been left within the vessel, it is proven that it will reduce fuel efficiency all the time it has not been maintained correctly. For calorifiers with no access hatch, a sample of drain water can be taken, and its condition noted.

Reasons For calorifier descaling and disinfections

–        Calorifier does not reach 60 degrees

·         High bacteria count or positive results of legionella obtained from calorifier

·         Excessive sediments found in calorifier upon inspection

·         Funny taste, odour or colour of the water at outlet.

·         New installation of hot water calorifier

·         Good practice in the prevention of legionella

Nathan Bal
NSK Contractors Ltd

We use EAWHS for all of our air and water hygiene work and have done for many years.

Fred Mansfield
Event Hire Group

We utilise EAWHS for their specialist water treatment services on a number of sites. They always deliver!

Jack Lee
June Commercial Services

Evolution Air & Water Hygiene Services have worked closely with us on a number of projects in the south east, the service we are provided with is second to none.

Michelle Dormer
Abby Marketing

Our ventilation system and water outlets needed to be tested and disinfected after some neglect. A full survey was carried out with explanations of problem areas showing clarity and good understanding

Jak Cantwell
Aventus Environmental

Specialist within the hygiene industry with a meticulous eye for detail, these are the reasons why we chose EAWHS every time.

David Catchpole
Estate Agent Director

EAWHS always exceed our expectations for the maintenance of our offices. Always pleasure, never a chore to deal with.

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