Ferroli Bluehelix HiTech RRT 24 C Combi Boiler with Vertical 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 provides up to 20 kW heating output at 80/60°C, with a maximum domestic thermal power of 21.6 kW and a domestic hot-water flow rate of 11.7 L/min at ΔT30°C.

This EuroFuelSupply product listing is specifically optimized for the vertical flue configuration, making it suitable for installations where the flue route is designed vertically through the appropriate roof/terminal arrangement.

The correct Ferroli flue components, lengths, terminal arrangement and installation clearances must always be confirmed against the current manufacturer documentation and the regulations applicable in the installation country.

Key Features

• Ferroli Bluehelix HiTech RRT 24 C
• Wall-hung condensing combi boiler
• Central heating and instantaneous domestic hot water
• Up to 20 kW heating output at 80/60°C
• Up to 21.6 kW maximum domestic thermal power
• 11.7 L/min DHW flow at ΔT30°C
• Class 6 NOx emissions
• Stainless-steel primary heat exchanger
• Multi Gas Ready (M.G.R.) technology
• Natural gas and LPG configuration
• MC² Multi Combustion Control
• Up to 1:7 modulation ratio on the 24 C
• CapSense touch interface
• 2.8-inch graphic display
• ECO function for DHW operation
• Vertical flue configuration
• Compact wall-hung installation

Ferroli Bluehelix HiTech RRT 24 C Technical Specifications

Ferroli’s published technical data confirms the 24 C specifications, including 20 kW heating output at 80/60°C, 21.6 kW maximum domestic thermal power, 11.7 L/min DHW flow and 94% seasonal space-heating efficiency.

Condensing Heating Technology

The Bluehelix HiTech RRT 24 C uses condensing technology to provide central heating while recovering useful heat from the combustion process.

Ferroli specifies a 94% seasonal space-heating energy efficiency for the range and an ErP heating energy class of A. Actual system performance depends on system design, operating temperatures, controls, installation and maintenance.

Stainless-Steel Primary Heat Exchanger

The boiler uses a high-thickness stainless-steel primary heat exchanger with large water passages.

Ferroli states that the exchanger is designed to support long service life, reduced maintenance and efficient operation, including when replacing older heating generators.

Instantaneous Domestic Hot Water

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

The manufacturer specifies:

• 11.7 L/min at ΔT30°C
• 21.6 kW maximum domestic thermal power
• Instantaneous DHW production
• DHW energy class A
• XL DHW load profile

These specifications make the 24 C suitable for residential applications requiring heating and domestic hot water from one appliance.

Class 6 Low-NOx Boiler

The Bluehelix HiTech RRT 24 C is a Class 6 NOx gas boiler.

Ferroli specifies NOx emissions below 56 mg/kWh for the range and identifies Class 6 NOx compliance as one of the principal product characteristics.

Natural Gas and LPG Ready

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

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

Vertical Flue Configuration

This product page is specifically intended to target customers searching for a Ferroli Bluehelix HiTech RRT 24 C with vertical flue.

A vertical flue arrangement can be appropriate where the installation requires the combustion-air/flue route to rise vertically toward a roof terminal.

The exact flue diameter, maximum permitted length, number of bends, terminal position and required accessories must be determined using the current Ferroli installation documentation.

Do not select a flue configuration solely from the product photograph. The installer should confirm the complete flue route before installation.

MC² Gas-Adaptive Combustion

Ferroli’s MC² Multi Combustion Control system uses gas-adaptive combustion technology designed to adapt operation to changing gas-network conditions, including pressure variations.

This is particularly relevant when comparing modern condensing boilers where stable combustion control is an important part of appliance operation.

Modulation Ratio

The 24 C model has a modulation range of up to 1:7, according to Ferroli’s current technical information. The wider Bluehelix HiTech RRT range has different modulation ratios depending on the model, with 1:7 for the 24 C, 1:9 for the 28 C and 1:10 for the 34 C.

This means the page should not incorrectly claim a 1:10 modulation ratio for the 24 C.

CapSense User Interface

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

The interface is designed to provide access to operating parameters and boiler settings through the appliance’s control panel.

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

The boiler can be considered for:

• Houses
• Apartments
• Residential heating systems
• Boiler replacement projects
• New heating installations
• Central heating with instantaneous DHW
• Natural gas installations
• Compatible LPG installations
• Wall-hung heating systems
• Installations requiring a vertical flue arrangement

Correct boiler sizing should be based on the property’s heating load and domestic hot-water requirements rather than simply selecting a boiler by its model number.

Vertical Flue vs Horizontal Flue

The main difference between these two product configurations is the flue route and terminal arrangement.

Vertical flue

A vertical flue configuration is designed for installations where the flue travels upward, typically toward a roof terminal.

It can be relevant where:

• A roof exit is required
• A suitable vertical flue route is available
• Wall-terminal positioning is unsuitable
• The building layout makes a vertical route more practical

Horizontal flue

A horizontal flue normally exits through a suitable external wall.

It can be relevant where:

• An external wall is available
• A wall terminal is permitted
• The appliance location allows the required clearances

The correct arrangement depends on the property, flue route, regulations and manufacturer-approved components.

Installation Requirements

Gas boiler installation should be performed by an appropriately qualified professional.

The installation should comply with:

1. Ferroli’s current installation manual
2. Approved Ferroli flue components
3. Local gas-safety regulations
4. Building regulations
5. Electrical requirements
6. Condensate-drain requirements
7. Required flue clearances
8. Applicable national requirements

For European installations, requirements can differ between countries. Always verify the rules applying at the actual installation address.

Why Choose the Ferroli Bluehelix HiTech RRT 24 C?

The Bluehelix HiTech RRT 24 C combines:

• Condensing boiler technology
• Wall-hung installation
• Stainless-steel primary heat exchanger
• 20 kW heating output at 80/60°C
• 21.6 kW maximum domestic thermal power
• 11.7 L/min DHW flow at ΔT30°C
• Class 6 NOx technology
• Natural gas/LPG-ready configuration
• MC² gas-adaptive combustion
• Up to 1:7 modulation
• CapSense control interface
• Vertical flue configuration

Frequently Asked Questions

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

Yes. It is a wall-hung condensing combi boiler providing central heating and instantaneous domestic hot water.

Is the Ferroli 24 C a 24 kW heating-output boiler?

Not exactly. The 24 C is the model designation. Ferroli specifies 20 kW maximum heating output at 80/60°C and 21.6 kW maximum domestic thermal power.

What is the hot-water flow rate?

The published DHW flow rate for the 24 C is 11.7 L/min at ΔT30°C.

Is the Bluehelix HiTech RRT 24 C a condensing boiler?

Yes. It is part of Ferroli’s Bluehelix HiTech RRT high-efficiency condensing combi boiler range.

Can the boiler use LPG?

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

Does this version use a vertical flue?

Yes, this EuroFuelSupply listing is specifically positioned for the vertical flue configuration. The exact flue kit and route must be checked against the current Ferroli installation documentation.

Is it suitable for European installations?

The Bluehelix HiTech RRT C is a Ferroli product marketed across European markets, with manufacturer documentation available for multiple countries including Germany, France, the Netherlands, Croatia, Bulgaria, Hungary, Ukraine and other markets.

However, local installation, gas and flue requirements must always be checked for the destination country.

Does it have low-NOx emissions?

Yes. Ferroli classifies the Bluehelix HiTech RRT 24 C as Class 6 NOx, with published NOx emissions below 56 mg/kWh.

Buy Ferroli Bluehelix HiTech RRT 24 C with Vertical Flue

Looking to buy a Ferroli Bluehelix HiTech RRT 24 C combi boiler with vertical flue in Europe?

EuroFuelSupply supplies heating equipment to residential, trade and commercial customers across supported European markets.

Before ordering, confirm:

• Gas type
• Vertical flue requirement
• Required flue accessories
• Installation country
• Boiler sizing
• Delivery destination
• Local installation requirements

For larger quantities, installer orders or project requirements, EuroFuelSupply also provides quotation enquiries for heating products and commercial purchases.