Heatrae Sadia FBM 25 ECO 3kW Cistern Type Water Heater
The Heatrae Sadia FBM 25 ECO 3kW is a cistern-type vented electric water heater with a 25 litre capacity, designed for commercial and domestic applications where a gravity-fed hot water supply is needed without mains pressure. Being fully vented, it requires no pressure relief valve or external venting — simplifying installation and long-term compliance. With an integral cold water cistern built into the unit, the FBM 25 ECO replaces the need for a separate loft tank, and includes Heatrae Sadia's intelligent Legionella Control System and fault-reporting electronics for improved commercial hygiene management. 25L Capacity 3.0kW Heating Element 30 min Heat-Up Time 3.5 minutes at 7L/min Fill Rate B ErP Class 5 Yr Warranty Integral Cistern Design The FBM 25 ECO incorporates its own cold water storage cistern, removing the need for a separate loft tank and simplifying installation in properties without existing hot water storage. No External Vent or PRV Needed As a vented water heater, it doesn't require a pressure relief valve or external tundish/discharge pipework — reducing installation complexity versus unvented alternatives. Intelligent Legionella Control Built-in Legionella Control System helps protect against harmful waterborne bacteria in commercial and multi-occupancy settings. Automatic Fault Reporting Electronic diagnostics provide automatic fault reporting, helping facilities teams identify issues quickly rather than relying on manual inspection. 3.5 minutes at 7L/min Fill Rate Rated fill flow of 3.5 minutes at 7L/min gives a clear benchmark for expected refill performance after draw-off. ErP Compliant Design Meets current Eco-Design and Energy Labelling Directives for water heaters, rated Class B for water heating energy efficiency. Performance Capacity 25 litres Heating Element 2.8kW @ 230V / 3.0kW @ 240V Heat-Up Time 30 minutes Fill Rate 3.5 minutes at 7L/min Efficiency (ErP) Load Profile S Water Heating Energy Efficiency Class B Water Heating Energy Efficiency 35.1% Annual Electricity Consumption 526 kWh Daily Fuel Consumption (Q elec) 2.48 kWh Heat Loss 0.56 kWh/24h Pressure & Water Supply Maximum Inlet Pressure 1 MPa (10 bar / 145 psi) Minimum Dynamic Supply Pressure 0.5 bar Type Direct, cistern-fed (vented) Construction & Physical Weight (Empty) 15kg Weight (Full) 40kg Dimensions (H x W x D) 832 x 514 x 236mm Compliance Product Code 95040300 Approvals Kiwa approved (Water & Building Regulations), Nemko approved (electrical safety), CE marked Warranty 5 years Does the FBM 25 ECO need a separate cold water tank?No — it has an integral cistern built in, so a separate loft tank isn't required.Does it need a pressure relief valve?No. As a vented water heater it does not require a pressure relief valve or external tundish, unlike unvented alternatives.How long does the FBM 25 ECO take to heat up?The manufacturer's rated heat-up time is 30 minutes from cold.What's the difference between FBM ECO and R Plus?Both are vented cistern-type heaters from Heatrae Sadia sharing similar footprints, but FBM ECO offers a higher ErP efficiency class and a 5-year warranty, while R Plus is a more budget-focused option with a 2-year warranty and simpler fault reporting via a flashing LED.Is the Legionella Control System automatic?Yes, it operates automatically as part of the unit's built-in electronics, requiring no manual intervention from the user.