Ferroli KALIS 24 C Condensing Boiler

The Ferroli Kalis 24 C (Ref. 695W00244) is a wall-mounted condensing boiler that offers the perfect balance of efficiency, durability, and thermal comfort. Designed for homes with medium heating and domestic hot water needs, it features advanced electronic controls that optimize performance and reduce energy consumption.

What’s included

• Ferroli Kalis 24 C boiler
• Flue outlet chimney (concentric kit)
• Installation and user manual

Key features

• High energy efficiency with condensing technology for lower gas consumption.
• Stainless steel heat exchanger for outstanding durability and corrosion resistance.
• Quiet operation with a low-noise modulating fan.
• Digital display with precise temperature control and fault diagnostics.
• Adaptable to natural gas or propane with a conversion kit.

Main technical data

• Heating output: 20 kW (useful).
• DHW output: 24 kW.
• Approximate DHW flow rate: ~13.7 l/min at ΔT 25 °C.
• Efficiency (LHV): up to 109 %.
• Dimensions (H × W × D): 700 × 400 × 250 mm.
• Weight: 28 kg.
• NOx class: 6 (low emissions).
• Power supply: 230 V / 50 Hz.
• Sound level: ~49 dB(A).
• Flue outlet: horizontal or vertical via concentric duct (kit included).
• Gas type: natural (convertible to propane).

Installation and compatibility

• Installation and commissioning by an authorized professional.
• Compatible with Ferroli modulating thermostats and remote control systems.
• Complies with European ErP efficiency and low emissions standards.

Recommended for

• Apartments and single-family homes with 1–2 bathrooms.
• Users seeking an efficient, quiet, and durable unit.
• Renovations replacing a conventional boiler with a modern condensing model.