External plant space was very limited on this project and so required a compact, fresh air solution with a high efficiency heat recovery mechanism. LMF’s HPR product range provided an AHU with a heat recovery wheel and integral DX heat pump system to temper air as a comprehensive solution. Normally, to maintain the heat pumps operation during a cold morning start up, an electric heater batter is usually placed to add energy to the air being drawn from the building. This means that the temperature of air entering the evaporator coil is enough to maintain operation and prevent it freezing, when the AHU is outside its operational envelope.
To meet the sites power supply limitations preventing the use of multiple electric heater batteries, we developed a method using DX, operating as effectively, but 5 times more efficient than conventional methods

“Reducing power consumption whilst maintaining effective operation.”

Outdoor units
2 x HPR 92
1 x HPR 144
3 x LG High COP frost protection units