I often received 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, if it is 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 in case of AHU failure, the first question of the service company will be “when did you change the filters?”. And even if the dirty filters are not a cause of a malfunctioning, all of the ventilation companies will take chance to recall their warranty obligations. The same happened with Volvo of my former colleague: he “forgot” to do the first obligatory maintenance and his warranty was terminated. Let’s hope it will not break in 5 years.
But one of the main reasons to change filter is not related to warranty issues. One of the main reasons is higher electricity consumption (especially important if the high utility payments significantly cut your funds). If your heat recovery unit is stuffed with a more advanced control system, as e.g. Smarty 3XP from SALDA, you can set to maintain constant airflow volume (I can see Komfovent representatives shouting, that you can also connect sensors for constant volume to Domekt. But only show us diploma in electrical engineering at first ????). In such case, a comfortable indoor climate will be maintained even if the filter gets more contaminated. Nevertheless, electricity consumption will increase gradually? But how much?