How do you know when you have a clean fan coil?


14 August 2017
Regular cleaning and maintenance of ACR units not only helps to prolong the life of the units, but helps your bottom line by reducing power consumption — as well as your carbon footprint.

But when it comes to cleaning the coils, are you actually doing what’s best or are you in fact causing yourself more issues in the long run?
The problem — which won’t come as a surprise — is the dirt itself. Dirt comes in many different forms: grease, fats, organic debris, rust, scale, inorganic salts and more, and this is the nub of the problem.

Different types of dirt can be at wildly different places along the pH acid–alkali spectrum and need different pH cleaners to combat them, so finding the correct cleaner is paramount.

Extreme build-up
You can typically categorise dirt into one of four types depending on where it sits on the pH scale and the oil–salt scale. Fundamentally, you have acidic oils, basic oils, basic salts, and acid salts.

HVAC cleaning products tend to skew sharply towards one end of the pH scale or the other to go in strong on particular dirt types. These products can be perfectly fine to use from time to time, when there may be an extreme build-up which needs shifting.

However, if you find yourself employing these harsh chemicals for regular maintenance, it may come at a high cost. While application of these chemicals may make them appear shiny and new and give the understandable impression of a job well done, they can strip the aluminium coils of their oxide layer, leaving them vulnerable to further dissolution. This will result in coils with a reduced mass and a significant reduction in energy efficiency.
Effective cleaning
As a response to this industry-wide problem, Advanced Engineering spent three years developing a product which could provide effective coil cleaning – across all four types of dirt – on a regular basis… without the detrimental side-effects.

The result was VerteX: a full-spectrum pH-neutral aqueous -based cleaner specifically designed for condensers and evaporators.

Unique within the HVAC market, the formulation of VerteX means it is able to adapt its pH value to better deal with dirt it comes into contact with… without damaging or etching coils.

VerteX has a low VOC (volatile organic compound). What’s more, VerteX has odour-neutralising properties, non-carcinogenic and SUPER-environmentally-friendly (this means that every ingredient in VerteX is 100% non-bioaccumulative, and that the chemistry framework is based on organic salts). This ensures it’s suitable for use, even during daytime shifts.

So, how clean are your coils? If the answer is too clean then it could be time to switch your maintenance regime. 
For more information on VerteX, suppliers and engineers can call Advanced Engineering on 01256 460300 or visit
Advanced Engineering has produced a new video to explain more about VerteX. You can watch it at
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