E.C.A Arceus EK 15, MT Electric Combi Boiler – 15kW (MPN: 8116271010) is a high‑efficiency, wall‑mounted electric combi boiler designed for properties without a gas supply or where an all‑electric solution is preferred. The MT (Monothermic Type) configuration incorporates two water heating circuits within a stainless steel tank‑formed heat exchanger, enabling the boiler to act as both a central heating source and instantaneous domestic hot water heater in one compact appliance.

Key Features

• 15kW electric combi boiler – delivers both central heating and instantaneous domestic hot water from a single compact wall‑hung unit.
• Monothermic tank design – dual water circuits inside a stainless steel tank‑type heat exchanger provide separate CH and DHW functions.
• 100% point‑of‑use efficiency – all electrical input is converted to heat on site, with no flue losses or combustion emissions.
• Staged electric elements – multiple resistors are switched in stages for simple, reliable modulation and smoother load management.
• Range‑rateable output – heating output can be range‑rated to better match property demand and improve ErP efficiency rating when configured.
• Very low noise level – quiet operation at approximately 38 dB makes it suitable for use in kitchens, cupboards and utility rooms.
• WRAS‑approved – certified for use on UK potable water systems.
• Built‑in smart modulator – optimises staging of elements, helping maintain stable temperatures and improve comfort and efficiency.
• OpenTherm compatible – supports OpenTherm smart room thermostats, improving control and offering potential 15–20% energy savings.
• Automatic filling loop and bypass – factory‑integrated components simplify installation and help protect the boiler and system.
• Frost protection & ECO modes – built‑in frost protection and ECO/COMFORT modes on the domestic hot water circuit.

Performance & Applications

• Central heating output: approx. 14.9kW (about 50,840 BTU/h), suitable for well‑insulated small to medium properties (typical heated area up to ~110–120 m², load‑dependent).
• Domestic hot water: maximum DHW output around 14.9kW with a flow rate up to about 9.3 litres per minute at a 35°C temperature rise.
• ErP ratings: ErP D for space heating seasonal efficiency, ErP C for domestic hot water efficiency.
• Ideal applications: all‑electric homes, apartments, off‑grid and low‑carbon projects, or properties pairing electric heating with PV, batteries and smart tariffs.

Technical Highlights

• Manufacturer: E.C.A
• Model: Arceus EK 15, MT Electric Combi Boiler
• MPN: 8116271010
• GTIN / EAN‑13: 8682182000980
• Nominal output: 14.9–15kW (central heating and DHW)
• Supply options: 400V three‑phase or 230V single‑phase (up to 15kW, configured according to site supply and wiring design)
• Boiler type: wall‑hung electric combi, sealed system
• Heat exchanger: stainless steel tank‑type, with electric elements that can be removed and cleaned
• Controls: digital front panel with LCD, built‑in diagnostics, ECO/COMFORT modes, OpenTherm interface
• Safety features: 3‑bar safety valve, automatic bypass, frost protection, overheat thermostat, pressure sensor, flow sensor and error logging
• Dimensions (H x W x D): approx. 678 x 410 x 288 mm
• Weight: around 27 kg (approx. 30 kg gross with packaging)
• Warranty: typically 3–5 years depending on distributor and registration (check specific T&Cs)
• Approvals: CE, WRAS and other regional conformity marks.

Installation Notes

• Installation and commissioning must be carried out by a suitably qualified engineer in accordance with the E.C.A installation manual and local electrical and plumbing regulations.
• Designed for sealed central heating systems; ensure an appropriately sized expansion vessel, safety valve and system treatment (inhibitor) are provided.
• Electrical supply, cable sizing and protective devices must be correctly selected for the 15kW load and supply type (single‑phase or three‑phase).
• For best efficiency and comfort, pair the boiler with an OpenTherm thermostat and consider integration with smart tariffs or home energy management where available.