Boiler with a single-circuit stainless steel primary exchanger without joints and/or welds, maintaining high efficiency even on older systems. MC2: Multi Combustion Control, a new combustion system with patented gas-adaptive technology derived from industry, for improved adaptability to changing gas network conditions (e.g., fluctuations or reduced pressure). MGR: Natural Gas, LPG, Propane Air Ready. Through a simple configuration, the boiler can operate on natural gas, LPG, and propane air without the use of additional conversion kits.
Technical Features
Model
Ferroli Bluehelix Theta 24C Condensing Boiler Complete with Methane/LPG Flue Gas Exhaust Kit
Product Code: 0TPY2AWA
Energy Efficiency
- ERP Class (Class G - A++) A / (Class G - A): A
- Max / min heating heat output kW: 20.6 / 5,
- Max / min heating power (80/60°C) kW: 20.0 / 4.9
- Max / min heating power (50/30°C) kW: 21.8 / 5.3
Performance
- Max / min domestic hot water heat output (Hi) kW 25.0 / 5.0
- Max / min domestic hot water heating power kW 24.3 / 4.9
- Efficiency Pmax / Pmin (80-60°C) (Hi) % 97.2 / 97.0
- Efficiency Pmax / Pmin (50-30°C) (Hi) % 105.8 / 106.9
- Yield 30% (Hi) % 108.8
- Max / min operating pressure heating bar 3 / 0.8
- Max / min sanitary operating pressure bar 9 / 0.3
- Sanitary flow rate ∆t 25°C l/min 14
- Sanitary flow rate ∆t 30°C l/min 11.7
Dimensions and weight
- Height (mm): 700
- Width (mm): 420
- Depth (mm): 250
- Weight (kg): 27
General Features
FERROLI THETA

- Boiler with single-circuit stainless steel primary exchanger without joints and/or welds, maintains high efficiency even on older systems.
- MC2: Multi Combustion Control, a new combustion system with patented industrial-grade gas-adaptive technology for improved adaptability to changing gas network conditions (e.g. fluctuations or reduced pressures).
- MGR: Methane, LPG, Propane air Ready through a simple configuration the boiler is able to operate on methane, LPG and propane air without the use of additional conversion kits
- Instantaneous production of domestic hot water with a dedicated plate heat exchanger
- User interface with display and multifunction keys for adjusting and setting parameters
- Bypass as standard
- Hydraulic connections covered by the boiler casing
- Removable 3-part casing for quick and easy maintenance
- Refined design and compact size
ADVANTAGES OF THETA C:
- Solar system provision: prepared for the production of domestic hot water combined with solar panel systems
- Sliding temperature operation via optional external probe
- Low-consumption modulating heating circulator (ErP Ready - Class A)
- Digital flame control with three re-ignition attempts in the event of operation being blocked due to lack of flame detection (methane model)
- FPS: Smoke Protection System. Using the optional smoke accessory (041106X0 - exhaust gas flap valve kit) that can be installed outside the boiler, it is possible to easily connect to collective pressurized smoke systems (e.g. in renovations), in accordance with the UNI 7129 regulation. NB: the kit cannot be used in built-in installations.
- Installation location: also for outdoor use in a partially protected area up to -5°C as standard and up to -15°C with the aid of the optional antifreeze resistance kit
- Free conversion from methane/LPG/Propane gas to air during initial product check and activation of the conventional warranty, to be requested from the Authorized Assistance Center