Testing Standards
- EN 308 - test methods for air-to-air heat recovery components; the basis for published effectiveness.
- EN 16798 - energy performance of buildings, including ventilation and recovery requirements.
- AHRI 1060 - rating of air-to-air energy recovery ventilation equipment (North America).
Certification
- Eurovent - independent certification that the claimed performance is real.
- CE marking - conformity with applicable EU directives.
Efficiency Regulation
- ErP / Ecodesign Lot 6 - minimum efficiency requirements for ventilation units with heat recovery in the EU.
- ASHRAE 90.1 - energy standard that sets recovery thresholds by climate zone.
How to Read a Citation
When a datasheet cites EN 308, it should state the test conditions (airflow, temperature difference, face velocity). A bare standard number without conditions tells you little. Our Standards section explains each document in plain language.
What to Look For
When gathering Air-to-Air Heat Exchanger Standards Index material, prioritise measured performance data over marketing claims. Look for independent test results, clear effectiveness and pressure-drop figures at your operating airflow, and drawings that show how the core is built. Case studies from a similar duty are more useful than generic brochures because they reveal real installation and maintenance lessons.
Standards and References
Recognised ventilation and energy standards give consistent definitions of effectiveness, air leakage, and conditioning, which make products comparable. Manufacturer submittals, AHRI and Eurovent style ratings, and energy-agency guides are good starting points. Keep a folder of the data you actually used so the specification can be audited later.
Using These Resources
Turn the data into a short comparison table for the options you are weighing, with airflow, effectiveness, pressure drop, and cost in the same units. Share it with the installer before order, because field conditions often differ from the leaflet. Good references also help during commissioning, when you check the installed unit against the stated performance.
Frequently Asked Questions
Which rating matters most? Effectiveness at your real airflow, not the peak catalogue value. Are vendor numbers reliable? Weigh them against independent or third-party test data where possible.
Practical Selection Checklist
For the Air-to-Air Heat Exchanger Standards Index duty, confirm the measured airflow and the temperature difference between the two airstreams before specifying any unit. Choose the core type that matches the exhaust cleanliness and the recovery target, allow margin for fouling, and verify the pressure drop stays inside the fan curve. Place filtration ahead of the core and provide a condensate drain where the supply side may fall below the dew point.
When to Specify This Solution
Energy recovery suits any plant or building that expels warm exhaust continuously while drawing in fresh air that must be conditioned from ambient. Common candidates include make-up air units, drying rooms, commercial kitchens, paint booths, and general process ventilation. Where the annual cost of heating or cooling make-up air is material, a correctly sized exchanger usually pays back within one to three operating seasons.
Next Steps
Start by logging the supply and exhaust conditions for a full duty cycle, then size the core from those numbers rather than from nameplate estimates. Compare the projected energy saving with the equipment and installation cost to get a payback figure, and review the comparison and product guides for the specific configuration that fits your site.