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Reduced Electricity Costs

Clogged filters increase resistance, making the unit use more energy. Clean filters help save electricity.

Cleaner Air at Home

Reduced airflow hinders ventilation, allowing dust, bacteria, and other particles to linger in your home.

Reduced Operating Noise

Dirty filters force the fan to work harder, increasing resistance and noise in the ventilation system.

Fewer Unpleasant Odors

Filters remove odors from bathrooms, kitchens, and closets. Old filters reduce their effectiveness.

Customer Reviews

The experience was seamless, they communicated well, and I got what I ordered quickly. I also found a product that I didn’t know existed, and ordered it as well. All in all, an excellent experience!

Steve Schafer

Trustpilot review

Top, fast shipment, good product

Tim Soenen

Trustpilot review

Get what I ordered, cheaper than in my country (post service included).

Matej

Trustpilot review

Fast and easy to order

Peter Postruznik

Trustpilot review

Everything was ok but it took like a week to receive the order when it appeared as completed in the status. Maybe more reliable information on the delivery process would be appreciated.

Toni Almansa

Trustpilot review

Most important: No fake shop 🙂 (i wos looking for an impressum and country of operating headquarters). Summary: Fast delivery. Moderate price. Good Quality. Quick and easy purchase. Good online-Shop. I miss Paying with Paypal.

Hans-dieter Tinhof

Trustpilot review

Very good product and good price

CARLOS MARTINS

Trustpilot review

Frequently Asked Questions

Frequently asked questions ordered by popularity.

What is the difference between G4, M5, F7, etc. class filters?

Filter class refers to the size and amount of particles a filter can trap. The higher the classification, the more effectively the filter removes particles from the air.

For incoming outdoor air, it’s generally recommended to use higher-class filters. However, we always suggest following the manufacturer’s guidance and using the specific filter sets outlined in your unit’s eco-commissioning documentation.

For more information, take a look at our comprehensive guide to filter classes for heat recovery units.

How often do I need to change the filters in my HRV?

It is recommended to change the filters in your MVHR every 3 to 6 months, depending on how dirty they become. However, the key signs that your filters need replacing include:

- An increase in noise from the MVHR

- A reduction in the amount of air being supplied or extracted

Smart MVHRs with an electronic control panel and display screen show the volume of air supplied and extracted per hour.

For example, if a Zehnder ComfoAir Q350 MVHR in a 140m² home operates at an optimal rate of 190m³ per hour but drops to 150–170m³, the filters should be replaced.

How do I change the filter on my recuperator?

It is recommended to change the filters in your HRV every 3 to 6 months, depending on how dirty they become. However, the key signs that your filters need replacing include:

- An increase in noise from the HRV

- A reduction in the amount of air being supplied or extracted

Smart HRVs with an electronic control panel and display screen show the volume of air supplied and extracted per hour.

For example, if a Zehnder ComfoAir Q350 HRV in a 140m² home operates at an optimal rate of 190m³ per hour but drops to 150–170m³, the filters should be replaced.

How do I find the model name and number of my HRV?

There are several ways to identify the manufacturer and model of your recuperator:

Check the label on the unit itself, which usually displays the manufacturer and model number.
Contact your installer or the developer/builder of your property for details.
Measure the width, length, and height of the filter, then use these measurements to browse our online shop. Our system will suggest the correct recuperator filters for your unit.
If none of the above help, please get in touch via the chat box at the bottom right of the page, and we’ll be happy to assist you.