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Designs compared

All four designs work in crossflow and keep the air or gas streams separated. They differ in how they are installed and which temperatures they withstand.

Design AEC-100 Insert block AEC-200 Bypass with damper AEC-300 Gas-tight welded AEC-400 Flange frame
Purpose Plate pack without casing for installation in air handling units. Material and plate spacing matched to your process.Insert block with integrated bypass. The louvre damper routes the air through the plate pack or past it.Fully welded and without seals: for very high temperatures and processes in which the gas streams must not mix.The plate pack sits in a surrounding frame and is flanged directly to the ducts of both air paths.
Material Aluminium, coated aluminium, stainless steel, plasticBlock as insert block, damper in aluminium, for corrosive air in stainless steel or plasticStainless steel, grade matched to the mediumAluminium, coated aluminium, stainless steel or plastic
Strengths
  • Plate spacing selectable per air side
  • Material matched to the medium
  • Bypass for summer operation and defrosting
  • Prepared for rotary or linear actuators
  • No leakage between the gas streams
  • Connection frames for welding or flanging
  • Direct duct connection without a separate unit casing
  • Plate material selectable to suit the medium
Limits
  • Needs a unit casing that separates the two air paths
  • Does not transfer moisture; an enthalpy block is available on request
  • Dampers and actuator need regular maintenance
  • Takes more space than the plain installation block
  • Stainless steel only, heavier than an aluminium block
  • Welded and therefore not dismantlable for cleaning
  • Frame and flanges need space in the duct network
  • Without dampers there is no bypass for frost protection or free cooling
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Should moisture be transferred as well? The difference between crossflow and enthalpy is explained in the article design comparison.

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