Why Counterflow
In a counterflow core the streams run in opposite directions, so the cold outgoing air meets the coldest part of the incoming stream. This squeezes out more energy than crossflow - typically 70 to 75 percent versus 60 to 65 percent sensible.
Customization Levers
- Plate spacing - tighter spacing raises area but also pressure drop
- Pass arrangement - number of counterflow passes and port layout
- Material - aluminium, polymer, or coated foil per duty
- Core depth - deeper core at lower face velocity lifts effectiveness
- Port size and position - match the AHU ductwork
When to Customize
Custom counterflow cores suit passive-house, low-temperature heating, or tight space where every point of effectiveness counts. For standard commercial jobs, a stock crossflow core is usually sufficient.
Verify
Confirm the customized core rating at your face velocity, not the catalogue nominal, and check the pressure drop against the fan.
What This Product Does
This unit is built as a compact air-to-air heat exchanger that transfers thermal energy between two separate air streams without allowing them to mix. Warm exhaust air passes over one side of the core while cooler supply air passes over the other, and the temperature difference drives heat from the warm stream to the cool one. The result is pre-conditioned make-up air that needs far less external heating or cooling, which lowers the load on the building or process system.
Construction and Materials
The core is formed from corrugated aluminium or stainless-steel plates bonded into a counter-flow pack, with sealed channels that keep the two air paths isolated. Frames are typically galvanised or powder-coated steel, and service doors give access for inspection and cleaning. Gasket materials are selected for the operating temperature and any mild chemical exposure, so the unit stays reliable in demanding ventilation duties.
Where It Fits
In the Counterflow Plate Core Customization configuration the exchanger is suited to HVAC make-up air units, paint and coating ovens, food and pharmaceutical drying, and general process ventilation where energy cost is a concern. It can be mounted horizontally or vertically to match the available plant layout, and it connects with standard flanged ductwork for straightforward integration with existing fans.
Frequently Asked Questions
Does it need power to operate? The passive core needs no electricity; only the associated fans and controls consume power. How often should it be cleaned? Inspect at least once per season and clean the exhaust side when temperature recovery begins to drop.