The RRU-FA range was conceived by Roccheggiani to meet the growing demand for air quality and energy savings. These units are intended to suit all systems where primary air supply needs to be ensured: systems with hydronic terminals or chilled beams, induction systems, radiant systems and existing systems needing improvement in order to provide the appropriate level of fresh air.
Fresh air handling is initially performed through a first stage of sensitive and latent heat recovery by means of a thermal wheel, with efficiencies exceeding 85%; a second stage of heat recovery is performed through a fully integrated refrigeration/heat pump cycle with R410A ecological refrigerant (thermodynamic recovery). A third stage of heat recovery takes place during cooling using the latent heat in condensation; during the summer dehumidification phase, a fourth heat recovery stage is performed by reheating the air using appropriately drawn hot R410A.
The units can be equipped (as an optional) with a water-filled pre-heating/cooling coil.
This kind of coil can be fed with return water from radiant systems or chilled beams; alternatively, RRU-FA units can also be integrated with geothermal or solar heat sources. Ten sizes are available with nominal air flows ranging from 2.500 to 25.000 m³/h.