Modification of existing PAU with additional dehumidification section was successfully performed for a hotel.

The room air conditions of guest rooms can be kept at 22 deg. C and 55% RH.

Spreadsheet programs equipped with tailor-made VBA functions were developed to size the heat pump components.

The dehumidification process can be presented with a psychrometric chart and is attached here as reference for our users.

By Sam Yip