Ferroli Bluehelix HiTech RRT 24 C 24 kW Combi Boiler with Horizontal Flue

Ferroli Bluehelix HiTech RRT 24 C combi boiler

The Ferroli Bluehelix HiTech RRT 24 C is a wall-hung condensing combi boiler designed to provide central heating and instantaneous domestic hot water from a single compact appliance.

The 24 C model delivers up to 20 kW heating output at 80/60°C, up to 21.6 kW at 50/30°C, and 24.5 kW maximum domestic hot-water output. It provides up to 11.7 litres per minute at ΔT30°C, making it suitable for residential heating and hot-water applications where compact installation and instantaneous DHW production are required.

This product page is configured around the horizontal flue option. The correct Ferroli flue arrangement, terminal position, pipe diameter and maximum permissible length must always be selected according to the appliance installation manual and the regulations applicable in the country of installation.

Key Features

• Ferroli Bluehelix HiTech RRT 24 C
• Wall-hung condensing combi boiler
• Central heating and instantaneous domestic hot water
• 20 kW maximum heating output at 80/60°C
• 21.6 kW maximum heating output at 50/30°C
• 24.5 kW maximum DHW output
• Up to 11.7 L/min DHW flow at ΔT30°C
• Class 6 NOx emissions
• Stainless-steel primary heat exchanger
• Multi Gas Ready technology for natural gas and LPG configuration
• MC² gas-adaptive combustion technology
• Modulation ratio up to 1:7 on the 24 C model
• CapSense touch controls and 2.8-inch graphic display
• ECO function for DHW operation
• Horizontal flue configuration
• Compact wall-hung design

Ferroli Bluehelix HiTech RRT 24 C Technical Specifications

The technical data above is based on Ferroli’s published Bluehelix HiTech RRT specifications.

Stainless-Steel Heat Exchanger

The Bluehelix HiTech RRT 24 C uses a high-thickness stainless-steel primary heat exchanger. Ferroli states that its large-pass design is intended to support durability, reduce maintenance requirements and maintain efficient operation, including when replacing older heating generators.

Condensing Boiler Technology

As a condensing boiler, the Bluehelix HiTech RRT 24 C is designed to recover useful heat from the combustion process.

Its published heating efficiency figures include approximately 94% seasonal space-heating efficiency, while the technical data gives efficiency values above 100% when calculated against the lower heating value under condensing test conditions.

Actual system performance depends on installation design, operating temperatures, controls, heat emitters, building characteristics and maintenance.

Instantaneous Domestic Hot Water

The Bluehelix HiTech RRT 24 C produces domestic hot water instantaneously through its dedicated DHW plate heat exchanger.

The manufacturer specifies:

• 11.7 L/min at ΔT30°C
• Approximately 14 L/min at ΔT25°C
• Maximum DHW useful output of 24.5 kW

This makes the boiler suitable for applications where heating and domestic hot water are required from one wall-mounted appliance.

Class 6 Low-NOx Gas Boiler

The Ferroli Bluehelix HiTech RRT 24 C is classified as Class 6 NOx. Ferroli states that the range complies with the applicable ErP NOx requirements and specifies emissions below 56 mg/kWh.

Natural Gas and LPG Configuration

Ferroli describes the Bluehelix HiTech RRT C range as Multi Gas Ready (M.G.R.), allowing configuration for natural gas or LPG without an additional conversion kit according to the manufacturer’s configuration procedure.

Before ordering, verify the gas configuration supplied with the specific product and confirm compatibility with the gas available at the installation location.

Horizontal Flue Configuration

This product is intended for a horizontal flue configuration.

Ferroli’s technical documentation provides coaxial flue options including 60/100 mm and 80/125 mm systems. For the Bluehelix HiTech RRT 24 C, Ferroli’s documentation specifies a maximum horizontal coaxial length of up to 7 m for 60/100 mm and up to 28 m for 80/125 mm, subject to the prescribed installation configuration and reductions for bends.

The flue supplied with your particular EuroFuelSupply package should be checked against the product listing before installation. Flue length, terminal position, condensate drainage and clearances must comply with the manufacturer’s instructions and local regulations.

Smart Controls and User Interface

The Bluehelix HiTech RRT 24 C features Ferroli’s CapSense touch interface and a 2.8-inch graphic display.

The controls are designed to make boiler settings and operating information easier to access. Ferroli also supports connection to compatible controls and system accessories for additional heating-management functionality.

MC² Gas-Adaptive Combustion

Ferroli’s MC² Multi Combustion Control technology is designed to adapt combustion to variations in gas-network conditions, including pressure fluctuations.

This technology forms part of the Bluehelix HiTech RRT range and is one of the product’s key technical features.

Where Can the Ferroli Bluehelix HiTech RRT 24 C Be Used?

The boiler can be considered for applications such as:

• Residential central heating
• Apartments and houses
• Replacement boiler installations
• New heating installations
• Central heating with instantaneous domestic hot water
• Natural gas heating systems
• Compatible LPG installations
• Properties requiring a wall-hung condensing combi boiler
• Installations using an approved horizontal flue arrangement

Correct boiler sizing should be determined from the heating load and domestic hot-water requirements of the property rather than from the model number alone.

Installation Requirements

Installation should be completed by an appropriately qualified heating professional in accordance with:

1. Ferroli’s current installation manual
2. The approved flue configuration
3. Gas-safety requirements
4. Electrical requirements
5. Condensate drainage requirements
6. Local building regulations
7. Applicable national and European requirements

Do not select a flue length or terminal location based solely on the product photographs. The installer should verify the complete flue route and required accessories before installation.

Why Choose the Ferroli Bluehelix HiTech RRT 24 C?

The Bluehelix HiTech RRT 24 C combines:

• Condensing heating technology
• Stainless-steel primary heat exchanger
• Instantaneous domestic hot water
• 20 kW heating output at 80/60°C
• 24.5 kW maximum DHW output
• 11.7 L/min DHW flow at ΔT30°C
• Class 6 NOx technology
• Gas-adaptive combustion
• Natural gas/LPG-ready configuration
• Compact wall-mounted installation
• Horizontal flue compatibility

Frequently Asked Questions

Is the Ferroli Bluehelix HiTech RRT 24 C a combi boiler?

Yes. The Bluehelix HiTech RRT 24 C is a wall-hung condensing combi boiler providing central heating and instantaneous domestic hot water.

Is the Ferroli 24 C a 24 kW heating boiler?

The 24 C is the model designation. Ferroli specifies a maximum heating output of 20 kW at 80/60°C and 21.6 kW at 50/30°C, while the maximum domestic hot-water output is 24.5 kW.

What is the hot-water flow rate?

The published DHW flow rate is 11.7 L/min at ΔT30°C, increasing to approximately 14 L/min at ΔT25°C.

Is the Ferroli Bluehelix HiTech RRT 24 C condensing?

Yes. It is a wall-hung condensing boiler designed for central heating and instantaneous domestic hot-water production.

Can it operate on LPG?

Ferroli describes the Bluehelix HiTech RRT C range as Multi Gas Ready for natural gas and LPG configuration. The exact gas configuration should be confirmed before installation.

Does this version use a horizontal flue?

This product listing is specifically optimized for the horizontal flue configuration. The exact flue kit and installation arrangement should be verified against the supplied product and Ferroli’s current installation documentation.

What flue sizes are available?

Ferroli’s technical documentation describes coaxial 60/100 mm and 80/125 mm flue systems for the Bluehelix HiTech RRT C range. Maximum permissible lengths depend on the diameter, configuration and number of bends.

Is professional installation required?

Yes. Gas appliance, flue and condensate installation should be performed by an appropriately qualified professional and must comply with the regulations applicable in the installation country.

Buy Ferroli Bluehelix HiTech RRT 24 C in Europe

Order the Ferroli Bluehelix HiTech RRT 24 C combi boiler with horizontal flue configuration from EuroFuelSupply for European delivery.

Before purchasing, confirm the required gas type, flue arrangement, accessories and installation requirements for your destination country.

For technical or product-order questions, contact EuroFuelSupply before placing your order so the correct configuration can be confirmed.