

Ultra compact, thermal battery for the storage of heat for domestic hot water. FlexTherm Eco is a thermal charging station. It converts electricity directly into heat and stores it for the provision of hot water. With its compact design and efficient operation, FlexTherm Eco fits in every home and is a very energy efficient appliance (energy label A+<> for inactivity losses).
Boost your low primary network temperature for the domestic hot water preparation with our new product combination “LogoEco Hybrid FL”. The LogoEco Hybrid FL is a unique combination of a Heat Interface Unit (HIU) and a FlexTherm Eco, an ultra-compact and efficient thermal battery for the preparation of Domestic Hot Water (DHW). The FlexTherm Eco stores energy (electrical or thermal) to make it available for instantaneous hot water generation. Click here for more information about the LogoEco Hybrid FL.
Technical specifications | FlexTherm Eco | ||
3E | 6E | 9E | |
Energy label (by inactivity losses) | A+ | A+ | A+ |
Storage capacity [Tc=75 °C] [kWh] | 3.5 | 7.0 | 10.5 |
Water content - Low power circuit (B-C) [l] | 1.30 | 2.36 | 3.46 |
Water content - High power circuit (A-D) [l] | 2.24 | 4.48 | 6.76 |
Power - Low power circuit (B-C) [kW] | 7 | 12 | 18 |
Power - High power circuit (A-D) [kW] | 15 | 25 | 35 |
V40, Volume of hot water available at 40 °C [l] | 85 | 185 | 300 |
Heat loss rate 24h [kWh/24h] | 0.449 | 0.649 | 0.738 |
Heat loss rate 1h [W] | 18.7 | 27.0 | 30.7 |
Recommended maximum HW flow rate [l/min] | 6 | 15 | 20 |
Minimum cold water supply pressure at inlet to the heat battery [bar] | 1.0 | 1.5 | 1.5 |
Maximum working pressure [bar] | 10 | 10 | 10 |
Pressure loss: Kv value for the low power circuit (LPC) | 1.623 | 1.255 | 1.066 |
Pressure loss: Kv value for the high power circuit (HPC) | 2.871 | 2.356 | 1.951 |
Minimum heat source flow temperature [°C] | 65 | 65 | 65 |
Maximum heat source flow temperature [°C] | 80 | 80 | 80 |
Hot water outlet temperature at design flow rate [°C] | 50 - 55 | 50 - 55 | 50 - 55 |
Heat battery controller: CC power supply rating at 230V, AC, 50Hz [A] | 6 | 6 | 6 |
Heat battery controller: Electric heater supply rating at 230V, AC, 50Hz [A] | 16 | 16 | 16 |
Standby power consumption [W] | < 1.0 | < 1.0 | < 1.0 |
Power rating of the heater at 230V, AC, 50Hz [kW] | 2.8 | 2.8 | 2.8 |
Weight Phase Change Material (PCM) [kg] | 40 | 75 | 110 |