Why a Glossary

Heat-recovery specifications mix thermodynamics, HVAC, and standards language. This glossary collects the terms you will meet most often on HeatRecoveryHub so that every article speaks the same language.

Core Terms

• Effectiveness (efficiency) - the ratio of actual heat transferred to the maximum possible, expressed as a percentage.
• Sensible recovery - transfer of dry-bulb heat only, with no moisture exchange.
• Latent / enthalpy recovery - transfer of both heat and moisture, used in humid climates.
• Counterflow - the two air streams travel in opposite directions for maximum effectiveness.
• Cross-flow - streams cross at right angles; simpler to build, slightly lower effectiveness.
• Frost risk - when exhaust air drops below freezing, condensate can ice up the core.

Equipment Terms

• Rotary wheel - a slowly spinning matrix that carries energy from exhaust to supply air.
• Plate core - stationary stacked plates; air passes in adjacent channels without mixing.
• Heat pipe - sealed tubes with a working fluid that moves heat by evaporation and condensation.

How to Use This

When an article mentions a term you do not recognise, check here first. Consistent definitions keep comparisons and sizing advice unambiguous.