DosaFil-Duo conditioning device cleans up police authority HVAC system

A brand new police authority headquarters in the Midlands has had its closed, low temperature hot water system saved from potential failure thanks to DosaFil-Duo®, a unique conditioning device that combines solid or liquid chemical treatment dosing with constant side stream filtration and continuous air removal.  The patent-pending technology is providing an economical and convenient alternative to powerflushing by cleaning and protecting the system online. DosaFil-Duo was installed after Anker Elemental, a fast-growing water treatment specialist contracted on the site, discovered there were harmful levels of contaminants within the system’s circulating water.

Despite being only recently installed, the hot water system, which controls ambient temperature in the building, contained extremely poor quality water, as Ian Looms, Managing Director at Anker Elemental explained:

“The water’s pH was wrong, it was full of suspended metal solids and so on. In-depth testing revealed that the system had not been cleaned correctly, or possibly at all, while the inhibitor concentration was insufficient. It was also apparent that water treatment had not been maintained in the lengthy period between completion and handover. These conditions are likely to lead to serious problems such as accelerated corrosion, blocking of the system’s control valves, and even complete system failure.”

In the absence of correct system cleaning and flushing, contaminants, such as flux residues, installation debris, and greases and oils from manufacturer components, will remain in system water. Such impurities not only cause corrosion but prevent subsequently dosed inhibitor from working effectively. Furthermore, water treatment - even when applied correctly - must be maintained to ensure lasting protection.

The first step in Anker Elemental’s remediation programme was to clean the system. Traditionally, the company may have chosen powerflushing for this purpose, however, DosaFil-Duo presented a better solution:

“It is our role, as custom water treatment specialists, to devise programmes that ensure the safe and reliable operation of critical systems while minimising energy, water and maintenance costs for our clients. In this case, powerflushing would have necessitated the opening of every valve on the system, all of which are behind wall panels. This would have been an extremely expensive endeavor and incredibly disruptive, potentially requiring large parts of the building to be shut down, a situation that is far from ideal for a police headquarters where operational continuity is imperative,” said Mr. Looms.

“DosaFil-Duo, on the other hand, enables commercial and industrial systems that are fouled with corrosion, limescale and harmful deposits to be cleaned up online (filtration is possible to 0.5 microns). By installing DosaFil-Duo, we eliminated the need for costly and inconvenient offline cleaning, and made it possible to optimise the energy efficiency, performance and longevity of the system, as well as minimise unplanned maintenance and system downtime. DosaFil-Duo was the obvious choice.”

Once installed on the system – a process which took less than a day as DosaFil-Duo removes the need for separate bypass chemical feeder, auto air vent and filter devices – the DosaFil-Duo’s filter feeder was dosed with BSK100, an innovative solid cleaning chemical from SolidTek Limited.

“We chose to use SolidTek’s solid online cleaning chemical because it is easier for us to introduce the quantities required. Also, solid chemicals dissolve at a steady, constant rate, as opposed to liquid chemicals which are introduced in one go. This ensured even distribution of the cleaning chemical throughout the system and meant that suspended solids were not mobilised too quickly, preventing potential blockages,” clarified Mr. Looms.

The remainder of Anker Elemental’s remediation programme includes bi-monthly visits to the site, where water quality samples are taken for analysis and the filter bags inside DosaFil-Duo are changed (a process which takes less than five minutes).

DosaFil-Duo is the only water conditioning device on the market with smart monitoring technology that automatically notifies users when filter bags require changing (with communication options for BMS built-in as standard). This feature was particularly attractive to the Head of Maintenance at the Police authority, as well as the principal mechanical contractor on the job:

“The filtration alarm provides reassurance to the customer that filter bags are changed as necessary, ensuring active and efficient management of the remediation process. Without such an alarm, the client would have to rely on the filter bags being checked regularly. This approach leaves room for error, or at best wastes labour and resources,” explained Mr. Looms.

Work started over the summer period, when large parts of the system were offline. For the parts of the system that were online, DosaFil-Duo delivered excellent results:

“We worked down from a 50 micron filter to a 10 micron filter, which shows just how much suspended solids the DosaFil-Duo picked up,” explained Mr. Looms. “We’ve only had to switch back up to a 25 micron filter since the offline sections of the system were placed online, as this mixed dirty water back in to the cleaner water. However, we’re confident that the system will be clean soon given DosaFil-Duo’s efficient performance,” he continued.

Results from the water quality samples have also been positive. “We test each sample for variables such as iron content, turbidity, conductivity and so on, and have seen vast improvements in water quality. In addition, we have documented progress for the client, who is pleased to receive visual and data evidence of the cleaning and protection programme.”

Anker Elemental has also since introduced a liquid chemical corrosion inhibitor into the system via the DosaFil-Duo device. “It is really important for us that we can use solid and liquid chemicals in the system as it gives us more control over the water treatment process, and DosaFil-Duo is the only device on the market which can do this,” said Mr. Looms.

The Police authority has been so impressed with DosaFil-Duo that a second device has now been installed in another building, this time on an existing medium pressure hot water system. DosaFil-Duo’s standard operating pressure and temperature ranges are unmatched in the market, enabling DosaFil-Duo to be used in a far wider range of systems (such as medium pressure hot water systems) than most other similar devices.

Furthermore, the principal mechanical contractor recommended DosaFil-Duo to the council, where two further devices have since been installed.

“The contractor and end-user have recognised the value of DosaFil-Duo as a means of cleaning, protecting and maintaining closed circuit systems in a cost-efficient and convenient manner. As a relatively new British manufacturer in the highly competitive HVAC industry, we are delighted that DosaFil has so quickly established itself as a highly-regarded and exceptionally effective conditioning device,” concluded Steve Crick, Managing Director of DosaFil.

For more information about DosaFil, please visit:

Specifi event – is it worth exhibiting?

Doesn’t matter whether you’re a large company or an ambitious and growing startup (like us),
putting valuable budget into exhibitions is always a little nerve-wracking. Will anyone show up? Will
the right people show up? Is it worth the cash?

DosaFil is a relatively new company (incorporated March of last year), so we have to balance getting
our name and product ‘out there’ with bringing sales in. But we’re big believers in marketing, so we
decided to take the plunge with Specifi.

Specifi is a built environment roadshow, so attendees come from a range of industries. It’s a very
unique event with a more relaxed focus on networking; specifiers can meet with technical experts
from a range of industries to discuss products which could benefit their businesses.

We exhibited at the Manchester show on the 3 rd July and the London show on 17 th July with our
DosaFil-Duo®S+ and DosaFil-Duo®Micro+ closed system conditioning devices on the stand (they
provide safe addition of liquid or solid chemicals, continuous side stream filtration from 50 micron
down to 0.5 micron, and automatic air removal). We also showcased solid on-line cleaning chemicals
from SolidTek, which are designed to be used in combination with the DosaFil-Duo® device.It was the first Specifi event for Andy Freer (DosaFil Sales Director) and Chris Harrison (DosaFil
Technical Director). They met with multiple specifiers and Mechanical and Electrical contractors
from the construction, design and building services industry who have requirements for water
treatment during the day, and, thanks to the networking dinner, spent the evening discussing the
unique concept and benefits of DosaFil-Duo® again! (of course, everyone was there to network over
dinner, so the exchange of information, and food, flowed freely). We certainly had great interest in
our products, especially as the device can save money and create significant efficiencies for water

Overall, Specify was a really interesting event to exhibit at. The right people did show up, there was
a great atmosphere, and the networking side was great. Definitely one to consider if you are in the
industry and looking to market your product or service.
What do you think? Which exhibition have you found most useful?

Eco-friendly water treatment? Must be DosaFil

Did you know that combining DosaFil-duo® devices with solid paste chemical sticks results in the UK’s most environmentally-friendly chemical system? Now you do! Here’s how DosaFil, together with solid chemicals, is the perfect solution for cleaning, protecting and maintaining commercial and industrial HVAC systems.

How do DosaFil-Duo devices work?

DosaFil-duo® devices combine chemical dosing with constant side stream filtration and continuous air removal. They are the ONLY devices on the market to combine these treatments. Consequently, DosaFil devices are able to clean even the most heavily fouled systems online, eliminating the need for long flushing processes and water waste.


How do SolidTek® solid chemical sticks work?

DosaFil® devices deliver on many levels, but the partnership magic happens when they are combined with SolidTek® solid chemical sticks. When you add solid sticks to the mix, DosaFil becomes the UK's most environmentally friendly chemical system.


SolidTek® solid sticks are more compact and lightweight than liquid chemicals, come in fully recyclable packaging, and are made in Britain. They save money on storage and transport costs, lessen H&S concerns (no heavy lifting!), and are really easy to dose - just pop them in to the DosaFil® device and go.


How combining DosaFil-Duo® and SolidTek® sticks will benefit you:


Steve Crick, MD of DosaFil® said:

"We set out to challenge the status quo, creating a safe, easy to install and operate water conditioning system that also addresses common key concerns of modern business, such as health and safety, eco-friendliness and reduction of energy consumption. A true revolution  in water treatment, DosaFil® plus solid chemical sticks represents the greenest approach to cleaning, treating and protecting systems”.



The easiest, most cost-effective way to prevent heating system problems

It is that time of year again when the weather gets colder and heating systems are fired up - possibly for the first time in months. Unfortunately, it’s also that time when many building owners and operators find that their system is not performing as it should.

There are multiple reasons why heating systems lose efficiency or fail; radiator blockages, pump failures, plate heat exchanger failures, small bore pipework becoming blocked, the list goes on. These issues are often caused by stagnation during the summer shut down period.

If a heating system fails, building owners don’t just face the inconvenience and cost of repair and remediation. Failure could lead to more serious consequences such as closure of buildings, relocation of tenants, loss of revenue and significant financial penalties.

What’s the easiest and most cost-effective way to prevent these issues? A system health check from DosaFil, as Chris Harrison, Technical Director DosaFil®, confirms:

“Regular water quality monitoring of closed heating systems is vital to ensure efficient system operation and quick resolution of potential issues.

Our system health check service offers building owners and operators a quick turnaround solution to determine current system water conditions and help identify any potential issues before they can turn into a system failure.”

A winter health check from DosaFil® is quick and simple thanks to our postal water sampling service.

Here’s how it works once you request a health check from us:

This service could save you time and money in the long run by avoiding costly downtime and failures, so if you want to find out more please get in touch: or 0345 605 0405

Which is safer: a magnetic device or physical filter?

Health and safety is one of the biggest considerations in plant rooms, so it's worthwhile assessing the pros and cons of magnetic devices vs physical filters in terms of safety and operation.

Devices containing magnets pose significant health and safety risks to people, and risks to equipment. The stark danger signs on the sides of these devices often include warnings such as:

Because of the risks, risk management then becomes quite a big job for those using magnetic devices (as opposed to those using physical filters, for example).

In contrast, magnet-free physical filtration devices pose no such health and safety risks, nor do they pose a risk to equipment. As such, they can be considered the safer option.

In our next blog post, we'll talk about the risk management required for those using magnetic devices (as opposed to physical filters, for example).


Why properly maintained systems don't need magnets

Magnetic filters are often pitched as the answer to keeping closed heating and cooling systems free of harmful and energy draining contaminants. Yet, they are actually not required in systems which are properly maintained.

BSRIA BG50.2021 states:

"Magnetite has an average particle size of 8um, which is too small to be captured by conventional barrier filter technology."

It goes on to say….

"Not all debris is magnetic and filters incorporating an element of non-magnetic retention may be preferred".

Let's take a closer look at the types of fouling in closed systems and whether the contaminants are attracted to magnets:

So, out of eight types of fouling, only one type - iron magnetite - is attracted to magnets.

On the contrary, correctly specified physical filters will remove ALL of these types of fouling.

Offering little advantage (and many disadvantages, including higher expense and health and safety considerations), why fit magnets?

Physical filters are clearly the most beneficial choice for closed systems where suspended solids are of concern.

At DosaFil, our devices combine side stream filtration with automatic air removal and chemical dosing.

DosaFil-Duo® devices are able to filter down to 0.5micron meaning they are able to effectively remove even the finest particles of suspended solids without the need for a magnet.

To find out more about our devices, please get in touch.


How to save energy and reduce commercial heating costs

Skyrocketing energy costs have increased commercial heating bills by 100% - or more in many cases – putting serious financial strain on businesses. One of the most simple and yet greatly overlooked ways to lower energy bills, often dramatically, is through adequate and effective water conditioning. Consequently, water conditioning represents a viable solution.


Hidden cost of poor water conditioning

In the absence of adequate water treatment, all commercial heating systems will experience fouling of the circulating water. This fouling typically comprises different types of corrosion products (which can form exceptionally quickly, especially where there is oxygen ingress as oxygen accelerates the rate of corrosion), limescale, and bio-fouling.

All of these forms of suspended solids can lead to serious problems within commercial heating systems, not only reduced energy efficiency, but also poor system performance, component failure, premature repairs and compromised operating life. In other words, the cost of poor water conditioning often runs into tens of thousands of pounds.


Even new systems fall foul

Got a new heating system? Don’t think that it can’t fall foul to suspended solids. In fact, detrimental levels of suspended solids can occur quickly, sometimes within a few months of a system being installed.


The benefits of efficient water conditioning

Conversely, a correctly applied and maintained water treatment programme will optimise system energy efficiency, operation, heat transfer and life expectancy. It is therefore essential for water quality to be carefully managed and controlled, a process which is best achieved via a combination of solid or liquid chemicals (cleaning agents, inhibitors and biocides, for example) and equipment.

The most convenient solution

DosaFil devices combines safe chemical dosing with automatic air removal and continuous side stream filtration. It ensures that all contaminants from 50 to 0.5 microns are filtered from the system (unlike magnetic filters which only remove ferrous suspended solids, but leave harmful non-ferrous solids in the system water), and is able to clean systems online – no downtime necessary.

DosaFil devices are also magnet free, a feature which eliminates the health and safety concerns, and take just two minutes to clean. Solid or liquid chemicals can be used in the devices, the range of which boasts unmatched standard operating pressure and temperature ranges.

If you’re concerned about skyrocketing energy costs and want a solution which can lower them, get in touch with DosaFil today.


Exhibiting the UK’s most eco-friendly chemical system in 2022

DosaFil was incorporated in 2017, and as a start-up, we were geared up to take every opportunity to exhibit our range of innovative DosaFil® conditioning devices for the water treatment industry. Those attracting the right crowd enabled us to speak to like-minded people who were passionate about innovative solutions for the water treatment industry and allowed us to get our name and our brand out there.

Then in 2020 Covid hit, having a profound impact on the working, home and family life of our whole team. All opportunities to attend trade shows, exhibitions, conferences came to a halt, and left us feeling ‘will we ever get back to life as it was before?’

We certainly hope so. For the first time in over two years, DosaFil® has committed to exhibiting at several events throughout 2022, Specifi and the CSA conference.

Specifi ‘Building Services - Mechanical’, Glasgow (Hilton Hotel), 16th June.

The Specifi events act as a key tool across the built environment sector, connecting people and putting suppliers in front of fourteen+ practices in each city to create new business opportunities or maintain existing relationships. Their face to face mini meets are a great opportunity to showcase your company, products and talk projects with influential specifiers from the best practices.

CSA (Commissioning Specialists Association): Making Buildings Work conference, London, 22nd June.              

The ticket only event will have presentations from speakers from across the commissioning and construction industry and will provide insight into the correct way to design, plan and install building services to ensure optimum best practice and in turn a successful commissioning phase, leading to an effective and efficient building.

There will be lunch provided and more informal sessions throughout the day so that attendees can network and meet with technical experts from a range of industries to discuss products which could benefit their businesses.

We have also confirmed space at further Specifi events in the UK and Ireland later this year.

At all of the shows, we will be exhibiting our range of devices, including the DosaFil-Duo® family and our DosaFil-Duo® Pumped Version family.

The DosaFil® range offers the widest range of conditioning devices in the industry. The innovative devices are designed and made in Britain and combine safe chemical dosing with automatic air removal and continuous side stream filtration. DosaFil® devices filter all contaminants from 50 to 0.5 microns, meaning no downtime necessary. They also become the UK's most eco-friendly chemical system when used with solid chemicals.

So, back to it, and perhaps back to a little glimpse of pre-pandemic “normality”. If you are attending the CSA Event (this is ticket only event, tickets available at, or if you are attending the Specifi event; please come and say hello to Team DosaFil®.



DosaFil® appoints Aquachem DAC as sole distributor for its innovative water conditioning equipment range in Ireland

DosaFil®, the UK’s leading manufacturer of smart and sustainable closed system water conditioning solutions, has partnered with Irish water treatment company, Aquachem DAC, to expand its presence in the Irish market. The partnership will ensure that commercial end-users and water treatment specialists in Ireland will benefit from knowledgeable and fast delivery of DosaFil’s® innovative solutions. This includes the DosaFil-Duo® range of water conditioning devices, which combines safe chemical dosing with automatic air removal and continuous side stream filtration, and DosaFil’s® new CPR-Technology – a time, cost and eco-saving system that enables pre-treatment cleaning of system fill water.

The partnership is a perfect match, with both companies having over 40 years’ experience in the industry, as well as an unrivalled passion for creating safe, easy, and sustainable water treatment solutions.

Aquachem DAC is based in Co. Meath, Ireland, and supplies tailored water management plans to solve the many problems encountered by industrial and commercial water users. The company boasts an impressive portfolio of clients thanks to decades of delivering impressive results in water management solutions, increased efficiency, and reduced energy costs.

Barry Higgins, Technical Director of Aquachem DAC said:

“We are often faced with challenges in heating and cooling systems which can take some time to resolve as there was never one piece of equipment that could solve the problem, but now thanks to DosaFil-Duo® these issues can be solved in a matter of weeks.

We have used DosaFil-Duo® devices at a number of our sites already and the results are remarkable, what makes it even more valuable is that our customers don’t need to turn off their water supply when we are flushing their system.

We are very impressed with DosaFil® and their team, they really have developed a state-of-the-art piece of equipment, which helps us give our customers peace of mind that their water is safe, and their systems are running as efficiently as possible”

DosaFil® Managing Director, Steve Crick, is equally happy about the partnership. He said:

“Aquachem DAC provide an exceptional service to clients throughout Ireland, and the team are as passionate about DosaFil® as we are. We are delighted that they are officially distributing the range in Ireland and have absolute confidence in their ability to deliver results to their clients.”

For more information about DosaFil®, please visit, and Aquachem DAC please visit

Treating a system <40,000 ltr? Get fast ROI with the New DosaFil-Duo® Nano

Closed loop heating and cooling systems of 40,000 litre volume or less, maximum temperatures of 90 degrees and maximum pressures of 10 bar now have the option to benefit from tailor-made DosaFil-Duo® technology. The new DosaFil-Duo® Nano family is perfectly suited to smaller sized systems, providing a cost and operationally efficient solution to water conditioning, combining safe dosing of solid or liquid treatment chemicals with constant side stream filtration and continuous air removal.

The DosaFil-Duo® Nano family comprises:
- DosaFil-Duo® Nano
- DosaFil-Duo® Nano+
- DosaFil-Duo® Nano+PV (Pumped Version)

The family of devices are a “do-it-all” conditioning device for the cleaning, protection and maintenance of closed heating and cooling systems, and enable compliance with BSRIA BG29 & BG50. Each model offers varying system volume, operating pressure and temperature ranges meaning there’s a wider choice to suit customer needs.

The DosaFil-Duo® Nano and DosaFil-Duo® Nano+ are small, compact units and both are wall mounted. Each unit holds up to 40,000 litres system volume, they have a maximum temperature of 90 degrees and a maximum pressure of 10 bar. The additional feature of the DosaFil-Duo® Nano+ is that it comes with smart monitoring built in which instantly notifies user when the filter bags need changing. It also has options for BMS built-in as standard.

The DosaFil-Duo® Nano+PV (Pumped Version) is a backboard mounted device enabling compact installation in tight plant rooms. It has a dedicated recirculation pump with controls to ensure good flow through the device and micro bubble coalescence. The Nano+PV is suited to system volumes up to 10,000 litres with a maximum temperature of 90 degrees and pressure of 10 bar.

Like the rest of the DosaFil® PV range, the DosaFil-Duo® Nano+PV devices come with OEM Grundfos smart pump technology, a 5-year guarantee and round the clock support from the DosaFil technical team. The entire range is manufactured in Britain and each unit proudly displays the official Made In Britain registered collective mark.