Energi- och kostnadsmässig jämförelse av FTX- och FVP-system i ett flerbostadshus : Jämförelse av ventilationssystem i ett flerbostadshus

The choice of heating system and to add heat recovery is becoming increasinglyimportant in order to meet the climate goals. The need for renovation of homesbuilt in the so-called million program is extensive. The purpose of the work is toevaluate two different ventilation systems and its profitability in connection withthe renovation of a property in Ljungby. The systems to be compared are asystem with presence-controlled FTX-apartment units and a system with exhaustair heat pumps. The goal is to present a result about which ventilation systemleads to the largest energy and cost savings compared to the existing ventilationsystem in the property.The results show that the ventilation system with presence-controlled FTXapartment units in each apartment should generate the lowest primary energy.The life cycle cost analysis showed that the most economically profitableventilation system is with FTX apartment units. The results also showed thatprojected and calculated average heat transfer coefficient can vary markedly. Insummary, the best choice is FTX apartment units with presence control. Thesystem consumes less energy than the FVP system, while avoiding dependenceon electrical energy