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unplug AHU summer
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TIPS for Summer: Turn off Ventilation Unit or Not

This is a question for a large number of our consumers. Especially in a time of crisis, when declining incomes are forcing us to look for ways to save. Let’s analyze the arguments. Reasons to switch off HRVU 1. In summer there is no need for heat recovery(unless in the first days of summer when it was cold 😊). Until mandatory by-pass requirements, some plate heat exchangers temporarily had been replaced with the special summer cassette. The rotor of the rotary heat recovery ventilation unit is stopped. 2. The HRVU…

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Domekt R 400 V
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F7+F7 filter set may increase the energy consumption of the ventilation unit even up to 30%

The vast majority of ventilation equipment manufacturers such as SALDA, Komfovent, Brink, Zehnder, etc. do not use a more efficient F7 class (ePM1) filter for the extracted air filtration. In general, 2 options are available: Standard set (mostly intended for the protection of internal components): G3+G3, G4+G4 or M5+M5 Efficient one to supply of clean and healthy air to the premises: F7+G3, F7+G4, F7+M5. Quite often analog filters suppliers offer only one set F7+F7. It is obvious that the second F7 filter on the extracted airside is excessive, it is…

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corona virus ventilation filters
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Do filters of residential heat recovery ventilation units protect from COVID-19?

The main purpose of filters of air handling units is to protect its internal components from contamination by particles and to supply healthy air into the premises. Ventilation filters are classified according to ISO 16890 standard into 4 categories: ePM1 (captures PM1 particles by higher efficiency than 50%), ePM2.5 (captures PM2.5 particles by higher efficiency than 50%), ePM10 (captures PM10 particles by higher efficiency than 50%), %), Coarse (captures PM10 particles by lower efficiency than 50%). Filters are being tested with a special mixture of particles in specialized laboratories to…

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Which one to choose: Original or analog filter?

A lot of our clients ask us why analog filters are cheaper. The others ask about the quality. Let’s dispel common myths: 1. Ventilation equipment manufacturers rarely produce filters themselves. In fact, up to 90% оf them buy filters directly from manufacturers of filters. Filters we sell are used as “original” ones by some ventilation manufacturers. 2. The self-costs of original and high-quality analog filters are similar. The same or similar materials and equipment are used to manufacture these filters. Most of the original filters are manufactured in Central or…

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FLEXIT filters with a synthetic frame!

Synthetic frame is usually used in the automotive industry due to the large filtering area, resistance to extreme climate conditions and hygienic properties. Therefore, Flexit selected such types of filters for some of their ventilation units. The same construction as original ones; 100 % moisture resistant. Suitable for humid Europe climate; Resistant to microorganism growth. Synthetic materials do not provide the possibility to grow microorganisms like molds, bacteria, etc. Wider filtering area. Usually, cardboard or metal frame coverts up to 1 cm to the surface in the edges. Synthetic frame…

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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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Why pay more? The right price for quality filters! Tested in Germany according to EN 16890 Dismiss