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What do people ask?

Frequently asked questions ordered by popularity. Remember that if the visitor has not committed to the call to action, they may still have questions (doubts) that can be answered.

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Frequently Asked Questions

Frequently asked questions ordered by popularity.

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

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 do I find the model name and number of my HRV? Plus icon Close icon
There are several ways to identify the manufacturer and model of your recuperator:
  1. Check the label on the unit itself, which usually displays the manufacturer and model number.
  2. Contact your installer or the developer/builder of your property for details.
  3. 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.
  4. 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.

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Support details to capture customers that might be on the fence.

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