Compare original KF kits and compatible Aerauliqa QR filter sets. Check model, dimensions, F7 + G4 or F7 + M5 and the declared ISO 16890 rating.
For an Aerauliqa QR unit, the best filter is the one that matches your exact model, dimensions, thickness, position and specified filtration class. There are three practical routes: an original Aerauliqa KF kit, a compatible replacement set verified for your model, or an individually assessed custom filter when the unit or housing has no catalogue match. This guide compares the options and explains how to read G4, M5, F7 and ISO 16890 before ordering.
Heat-recovery ventilation units are designed to operate across a range of airflows and pressures. Their actual operating point depends on the ducts, terminals and system settings. A correctly sized compatible filter with specifications suitable for the unit does not damage it simply because it is not an original part. Dimensions, sealing, filtration class and airflow resistance all matter. Maintenance makes the difference: a heavily loaded filter increases resistance and may reduce airflow or make the fans work harder to maintain it. Regular replacement helps keep the system working properly.
The QR range includes different sizes and variants. The KF catalogue lists pairings by full model designation: do not choose using “QR” or a photograph alone. Our examples cover QR180A / QR180M / QR180PH / QR230E and QR280A / QR280E / QR280M / QR280PH.
The manufacturer’s KF data sheet lists separate filter versions for sizes 100, 120, 180, 280, 340 and 400, with their own codes and classes. There is no universal QR filter.
Before looking for a replacement, record:
These four details make the choice a comparison rather than a guess.
Four types of offer are worth distinguishing. An original Aerauliqa KF kit carries the unit manufacturer’s replacement code: check the precise kit and availability through distributors or installers. A compatible ZenAero set lists specific QR variants, dimensions and declared filtration ratings; your complete model must appear in the compatibility list.
Other compatible replacements should be assessed using the technical sheet for the specific product, including thickness and pressure drop. Custom-made filters require exact measurements and the appropriate frame and class, particularly for modified or non-standard housings.
The KF range includes G4, M5 and F7 filtration elements. The catalogue lists G4 and F7 for size 180 and M5 and F7 for size 280, with model-specific pairings. Original kits are normally obtained through distributors or the installer.
The KF sheet identifies codes and classes; it is not a photographic comparison of ZenAero compatible sets. The replacement photographs below come from the relevant ZenAero product pages.
Compatible filters are independently made replacements, not original parts. Prefer a product sheet naming the exact compatible units, dimensions in millimetres and declared ISO 16890 class over a generic “suitable for Aerauliqa” description. If considering a higher class such as F9, check whether the unit permits it and compare pressure drop at the same airflow. Material, area and construction affect resistance as well as class.
If the unit is absent from catalogues, the housing has been modified or only the filter measurements are known, provide accurate dimensions and the required class. Have the suitability of the proposed custom replacement confirmed rather than improvising an approximate fit.
G4, M5 and F7 come from the former EN 779 standard and remain common commercial descriptions. ISO 16890 classifies performance against particle fractions using ISO Coarse, ePM10, ePM2.5 and ePM1, with the relevant declared efficiency. The testing methods differ: an F7 is not automatically ePM1 60%.
For the ZenAero sets in this guide, the declarations are:
| Filter | Commercial class | Declared ISO 16890 rating | Typical purpose |
|---|---|---|---|
| Coarse | G4 | ISO Coarse | Capture dust and coarse particles |
| Medium | M5 | ePM10 60% | Capture a proportion of smaller particles |
| Fine | F7 | ePM1 60% | Increase capture of fine particles |
In a balanced heat-recovery unit, filtration has two roles. As discussed in the REHVA Journal article on filtration in MVHR homes, coarser filtration can protect the heat exchanger, while a finer supply-air filter reduces outdoor particles entering the dwelling.
Use the pair specified for the model or a permitted alternative. Fitting two F7 filters where F7 + G4 is intended, or swapping their positions, is not an automatic improvement.
| Compatible unit models | Combination | Declared ISO 16890 classification | Dimensions of each filter |
|---|---|---|---|
| QR180A, QR180M, QR180PH, QR230E | F7 + G4 | ePM1 60% + ISO Coarse | 200 × 200 × 46 mm |
| QR280A, QR280E, QR280M, QR280PH | F7 + M5 | ePM1 60% + ePM10 60% | 250 × 183 × 21 mm |
The manufacturer’s KF catalogue supplies class and model pairings; the dimensions and ISO percentages in this table come from ZenAero product specifications. The thicknesses are 46 mm and 21 mm: these sets are not interchangeable. Check the complete unit variant and the position of each filter.
The QR280 set contains F7 + M5, declared as ePM1 60% + ePM10 60%. One pack is one set of two filters; verify the selected pack and quantity before ordering. For other QR sizes, use the catalogue or ask us to check the unit rather than choosing an approximate match.
If a detail does not match, or previous replacements have no identifiable specification, return to the unit manual. Read the compatibility guide.
There is no interval suitable for every QR unit. Frequency depends on model, class, running hours, airflow and outdoor conditions. Traffic or nearby building work can load filters faster than a cleaner location. Use the unit manual and any maintenance indication as the starting point.
During inspection, look for heavily darkened or clogged media, a distorted frame, damaged seals, reduced airflow at terminals, damp filters or signs of mould. Clean or wash only when the instructions explicitly permit it for that filter type; otherwise replace the loaded filter.
If the unit is installed in an unheated garage or technical room, also check humidity and condensation. Cold surfaces can collect condensation, as discussed in this external article on garage condensation and sectional doors. A damp environment also affects filter housings.
When to replace ventilation filters.
Our aim is to offer European-quality compatible filters, effective filtration and good value. At ZenAero, the value of a replacement lies in its materials, careful assembly and suitability for the ventilation system.
The ePM1 60% declaration describes efficiency against PM1 particles under ISO 16890; it does not mean that every particle or allergen is removed. Choose the set specified for your model and maintain it according to the unit’s instructions.
These sets fit different models and have different dimensions. Choose only the set listing your complete unit designation. Price and availability depend on the selected pack.
Available in selected options
Price range: 22.45 € through 76.95 €
Available in selected options
Price range: 22.95 € through 77.95 €Our catalogue includes compatible QR180/QR230E and QR280 sets with model lists, dimensions and ISO 16890 ratings. If your model is absent or the housing is non-standard, ask us to verify the replacement or request Custom-made ventilation filters with the unit designation and measurements.
G4 mainly captures coarser dust and protects the heat exchanger. F7 captures a larger proportion of small particles. For the ZenAero QR180 set, the G4 element is declared ISO Coarse and the F7 element ePM1 60%; always read the individual product sheet.
Balanced units such as QR180 and QR280 use two filters, one in the outdoor-air stream and one in the extract-air stream. Replacement sets commonly combine two classes. Check the exact number and positions in your model’s manual.
Yes, when dimensions, thickness and class meet the unit’s requirements and the ISO 16890 declaration is clear. It is still an independently manufactured replacement, not an original part. The full model designation remains essential.
Follow the unit’s manual, maintenance indication and actual filter condition. Outdoor air, operating hours and class all affect the interval; there is no universal schedule for every installation.
All trademarks belong to their respective owners and are used only to identify equipment and replacement compatibility. ZenAero compatible filters are not original parts from the ventilation-unit manufacturer. Before ordering, check the full model, dimensions and product specifications.
