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How to change AHU filters correctly?

This is one of the main questions that arise when a customer receives 2 ventilation filters. Especially when you change them the first time. Actually changing filters is easy, so you don’t need to pay any installers to do it. Just follow these rules 1. If the filter classes are different, a more efficient filter is always installed on the outdoor air duct. Meanwhile, G3-G4 (Coarse) or M5 (ePM10) class filters are used for exhaust air filtration, as they provide sufficient protection of the recuperator from contamination while using less…

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Rules of filter selection for the air handling unit

Facebook Which filter to select from all the alternatives? Whether it is SALDA, Komfovent, Systemair, Flexit or Wolf AHU, the basic rules are as follows: 1. Technical documentation of the manufacturer.  The AHU comes with the original set of filters. The ventilation units are tested according to these filters. The manufacturer specifies filter alternatives to this ventilation unit. Therefore, if you choose another class of filters (e.g. cheap Coarse instead of ePM10 or more effective ePM1, if only Coarse is allowed), you would violate the warranty requirements and in case…

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What ventilation equipment seller won’t tell you, or how much does energy your air handing unit use

Facebook If you are planning to build your own house, you will need ventilation with a heat recovery and a bunch of sellers will praise their products. The most of them will point out fantastic amount of energy you will save and will not bother to tell that there is Commission regulation (EU) No. 1253/2014, which requires to provide unit data according to certain conditions, not to theoretical 95% efficiency. Even by providing the data sellers won’t tell that Eco-design data is calculated and not measured at the most cases,…

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Reasons to change filters

I often receive a question from my clients: why do I need to change the filters? One of my friends was surprised to know that he needs periodically change filters in its Domekt R 400 V: „Of course I understand that I need to change filters in my vacuum cleaner, but this is different!“. First, all manufacturers of air handling units, doesn’t matter, is it SALDA, Wolf or Swegon, clearly state that if you don’t change the filters on time, your warranty is being voided. And don’t be surprised that…

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Fresh air does not have to be expensive

18 years ago, I’ve bought my first inkjet printer from HP. When it ran out of ink, I was extremely surprised that a new printhead costed about 1/3 of the printer’s price. I’ve looked everywhere and eventually found a company what refilled for ¼ of new printheads price. Nowadays there are a lot of sellers of aftermarket printheads in a price 2 times lower than original one. The same situation is with air filters. Whether it’s a car or a ventilation unit filter you can select OEM (original) or PMA…

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