At Rekupex, we offer enthalpy heat exchangers for a wide range of ventilation units from various manufacturers. We continuously expand our range to cover as many commonly used ventilation systems on the market as possible.

To make it easier for you to understand the differences between enthalpy exchangers from RECUTECH, ZERN Engineering, CORE, and AIRWOODS, we have prepared a clear technical comparison of exchangers of the same size 366 × 366 × 400 mm, which can be directly compared thanks to their identical dimensions.

• pressure drop at different air flow rates
• heat transfer efficiency
• moisture transfer efficiency

Input conditions according to EN 308:2022

• Outdoor air temperature: 5 °C
• Outdoor air relative humidity: 72 %
• Extract air temperature: 25 °C
• Extract air relative humidity: 50 %

The results were obtained using the selection and design software of the individual manufacturers.

The input parameters are unified according to EN 308:2022, unless stated otherwise. For AIRWOODS, different input values according to the manufacturer’s documentation were used, therefore the inputs differ.

⭐ best value in the given category

¹ The values were determined based on calculations in the manufacturers’ selection programs under the input conditions defined by EN 308:2022.

* Different input values according to the manufacturer’s documentation were used for AIRWOODS.

Based on our long-term experience with the design and integration of enthalpy heat exchangers into various types of ventilation units, we particularly recommend RECUTECH exchangers, which stand out thanks to their very good efficiency / pressure drop ratio, robust construction, and above all excellent technical support from the manufacturer.

Thanks to this cooperation, the exchangers can be easily adapted to a wide range of ventilation units, including retrofit installations in older equipment.

What is the difference between an enthalpy heat exchanger and a standard heat recovery exchanger?

An enthalpy heat exchanger transfers not only heat, but also part of the moisture from the extract air to the supply air. This helps maintain a more comfortable indoor humidity level, especially during the winter season.

What is the typical efficiency of an enthalpy heat exchanger?

The temperature efficiency of modern enthalpy heat exchangers usually ranges approximately between 75–90 %.
The moisture transfer efficiency is usually lower and generally ranges approximately between 40–75 %.

Both values are significantly influenced by the exchanger design, membrane quality, and especially the air volume flow rate at which the exchanger is operated.

Can an enthalpy heat exchanger be installed in an older ventilation unit?

Yes, at RekupeX we not only sell exchangers, but also technically adapt them for specific ventilation units. We manufacture our own sealing and mounting profiles, and if necessary we also produce reduction casings. Thanks to this, we can offer an enthalpy replacement even for older ventilation units, where compatibility may at first glance appear problematic. A typical example is exchangers for Atrea units.

Note: The technical data and graphs presented in this overview were prepared based on the technical documentation of the individual manufacturers and the results of their selection or design tools. Although we have made every effort to ensure maximum accuracy, individual values may vary depending on the specific operating conditions, unit configuration, or updates to the data provided by the manufacturers.

The stated REKUPEX evaluation is based on our long-term practical experience with the design, sale, and integration of enthalpy heat exchangers into various types of ventilation units.

If any manufacturer identifies an inaccuracy or has a comment regarding the stated data, we will be grateful for the notice and will be happy to adjust the data.

If you are unsure which enthalpy heat exchanger is suitable for your ventilation unit, do not hesitate to contact us. We will be happy to help you choose the right solution.