EAHP Design

The performance of Exhaust Air Heat Pumps (EAHPs) is highly sensitive to system design. Two factors are critical.

• First, ductwork strategy. EAHPs depend on efficient air movement; long or complex duct runs increase static pressure, drive higher fan energy and reduce airflow which directly undermines cooling performance.
• Second, unit positioning. Locating EAHPs close to the façade enables short, direct duct routes, minimising resistance and preserving system efficiency and therefore achieving the name plate cooling.

Optimising these not only improves operational performance but also supports robust Part O compliance. Reliable ventilation rates are far more achievable where systems are not constrained by unnecessary duct length or pressure losses—reducing performance risk at both design and delivery stages.