– KPI
2-way Energy Recovery Ventilation Unit
– KPI
2-way Energy Recovery Ventilation Unit
– Reduce annual electricity consumption by up to 79%
Normally, ventilation will significantly increase the loading on the AC because it has to work much harder to condition the incoming fresh air to the set temperature indoors. However, the KPI unit is able to reduce annual electricity consumption by up to 79%[1] compared to using a normal ventilation exhaust fan, because the incoming fresh air is pre-conditioned to be closer to the set temperature indoors.
– Energy recovery ventilation
The KPI unit works through an energy-recovery process that efficiently transfers the energy between the indoor and outdoor air streams without mixing them. It achieves this through use of a cross-flow sheet made of ultra-thin celluloid material.
– Suitable for both VRF and commercial split systems
Because it does not connect to any refrigerant system to pre-condition the air, it can be used in both VRF and commercial split systems through a ducted connection and can continue to operate effectively when the AC system is switched off.
Three different energy recovery modes are supported:
• Automatic Mode switches the ERV function on or off based on the gap between the set temperature, the indoor temperature and the incoming fresh air temperature. It automatically manages the ERV in order to maximize energy efficiency.
• Forced Exchange Mode ensures the ERV function is always on so that energy recovery is always performed
• Bypass Mode means that the ERV function is never performed and the outdoor fresh air is distributed into the indoor space without adjusting the air temperature.
Additionally, in all modes it is possible to set the fan speeds individually, creating air pressurization in a room to avoid smoke and pollution transfer from one room to another. Either the supply fan or the exhaust can be increased one step higher than the other to create pressurization or de-pressurization.
– Air filtration and CO2 monitoring
The unit comes with G3 filters fitted to both the air inlet and outlet, with the option to add an additional F7 filter at the final air treatment stage. An optional CO2 sensor can be installed to enable more precise control of the ventilation based on the levels of CO2 detected indoors.
– Near-silent operation
The expanded polystyrene (EPS) internal structure has been designed to reduce the weight of the unit and the degree of air resistance. Combined with the use of highly-efficient EC fan motors, this has the effect of reducing the noise generated by the unit. In fact, KPI energy recovery ventilation units can run as low as 24dB(A) noise levels[2]. The EC fan motors themselves are up to 50% more energy efficient than normal fan motors[3].
– Connect to a Central Station controller
Control of KPI units can be fully integrated with an Hitachi VRF system using H-LINK wiring and a Central Station controller, making it easier to operate and monitor ventilation and air conditioning as an integrated system.