Ferroli Bluehelix HiTech RRT 24 C 24 kW Condensing Combi Boiler

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 appliance.

The 24C model combines a stainless-steel primary heat exchanger, electronic combustion control, Class 6 NOx performance, a wide modulation range and instantaneous domestic hot-water production.

For the 24C, Ferroli specifies a maximum heating output of 20.0 kW at 80/60°C, up to 21.6 kW at 50/30°C, and a maximum domestic hot-water thermal output of 24.5 kW. The specified DHW flow is 11.7 L/min at a 30°C temperature rise.

Key Features

• Ferroli Bluehelix HiTech RRT 24 C
• Wall-hung condensing combi boiler
• Instantaneous domestic hot-water production
• Up to 20.0 kW heating output at 80/60°C
• Up to 21.6 kW heating output at 50/30°C
• 24.5 kW maximum DHW thermal output
• 11.7 L/min DHW flow at ΔT30°C
• 94% seasonal space-heating efficiency
• Class 6 NOx
• Stainless-steel primary heat exchanger
• M.G.R. natural gas/LPG ready
• MC² gas-adaptive combustion control
• Modulation ratio up to 1:7 on the 24C
• CapSense touch interface
• 2.8-inch graphic display
• Compact wall-mounted design
• Optional remote-control and outdoor-temperature functions

Ferroli Bluehelix HiTech RRT 24 C Combi Boiler

The Bluehelix HiTech RRT 24 C is a combi boiler, meaning one appliance provides both central heating and domestic hot water.

Unlike a system boiler that normally works with a separate hot-water cylinder, the Bluehelix HiTech RRT 24 C produces domestic hot water instantaneously through its dedicated DHW plate heat exchanger.

Ferroli identifies the HiTech RRT C range as wall-hung condensing boilers with instantaneous domestic hot-water production.

20 kW Heating Output

The 24C model should not be marketed simply as a boiler delivering 24 kW of central-heating output.

Ferroli’s technical data specifies:

• Maximum heating thermal output at 80/60°C: 20.0 kW
• Maximum heating thermal output at 50/30°C: 21.6 kW
• Minimum heating output at 80/60°C: approximately 3.4 kW
• Maximum DHW thermal output: 24.5 kW

This distinction is important when sizing the boiler for a property.

24.5 kW Domestic Hot-Water Output

The Ferroli Bluehelix HiTech RRT 24 C provides up to 24.5 kW maximum domestic hot-water thermal output.

Its specified domestic hot-water flow rate is:

11.7 L/min at ΔT30°C

The 11.7 L/min figure should always be understood in relation to the stated temperature rise. Actual hot-water flow will vary according to incoming water temperature, outlet temperature, water pressure and system conditions.

Condensing Boiler Technology

The Bluehelix HiTech RRT 24 C is a condensing gas boiler designed to recover additional heat from the combustion process.

Ferroli specifies 94% seasonal space-heating energy efficiency for the HiTech RRT 24C, with an ErP space-heating class of A.

Actual energy consumption depends on property heat demand, operating temperatures, system design, controls and usage.

Stainless-Steel Primary Heat Exchanger

The boiler uses a high-thickness stainless-steel primary heat exchanger.

Ferroli states that its large-pass stainless-steel exchanger is designed to maintain high efficiency and support durability, including in systems where existing heating circuits may contain oxidation or deposits.

The stainless-steel heat exchanger is therefore an important product entity to include when comparing the Bluehelix HiTech RRT 24 C with other condensing combi boilers.

Class 6 NOx Boiler

The Ferroli Bluehelix HiTech RRT 24 C is classified as Class 6 NOx under EN 15502-1.

Ferroli states that Class 6 corresponds to NOx emissions below 56 mg/kWh under the applicable classification.

This makes the model relevant for searches for:

• Class 6 NOx boiler
• Low-NOx combi boiler
• Ferroli Low-NOx boiler
• Ferroli Class 6 boiler
• condensing boiler Europe

Natural Gas and LPG Ready

The Bluehelix HiTech RRT range is designed for operation with natural gas and LPG.

Ferroli refers to its M.G.R. — Methane LPG Ready system, stating that the boiler can be configured to operate on methane or LPG without additional conversion kits.

The exact fuel configuration must be confirmed for the appliance supplied and the destination-country installation requirements.

MC² Gas-Adaptive Technology

The Bluehelix HiTech RRT incorporates Ferroli’s MC² Multi Combustion Control system.

Ferroli describes this as gas-adaptive combustion technology designed to adapt combustion operation to changes in gas-network conditions, including pressure variations.

Modulation Ratio

The Bluehelix HiTech RRT 24 C has a modulation ratio of up to 1:7.

This allows the boiler to adjust its output over a broad operating range according to heating demand.

Ferroli specifies:

• 24C: up to 1:7
• 28C: up to 1:9
• 34C: up to 1:10

The 24C therefore has a maximum modulation ratio of 1:7.

CapSense Touch Interface

The Bluehelix HiTech RRT features a CapSense touch interface with a large 2.8-inch graphic display.

The interface allows operating parameters and boiler functions to be accessed through the front control panel.

Technical Specifications

The current HiTech RRT technical data gives the 24C dimensions as 700 × 400 × 320 mm and weight at approximately 28.4 kg.

Dimensions and Installation

The Bluehelix HiTech RRT 24 C has a compact wall-hung format:

700 mm H × 400 mm W × 320 mm D

This makes it suitable for installations where a wall-mounted combi boiler is preferred, subject to the required installation clearances and system design.

The boiler must be installed according to Ferroli’s current installation instructions and the regulations applicable in the destination country.

Outdoor Installation

Ferroli’s international documentation states that the Bluehelix HiTech RRT C can also be installed outdoors in a partially protected location down to -5°C as standard, and down to -15°C when the optional antifreeze heater kit is used.

If this EuroFuelSupply product is being sold specifically for outdoor installation, confirm that the required protective and antifreeze accessories are included or available before advertising it as an outdoor package.

Applications

The Ferroli Bluehelix HiTech RRT 24 C can be considered for:

• Apartments
• Houses
• Smaller residential properties
• Renovation projects
• Heating-system replacements
• Properties requiring instantaneous domestic hot water
• Natural-gas installations
• LPG installations where the appropriate configuration is supplied

The correct boiler size should be determined from the property’s heating demand and domestic hot-water requirements.

Ferroli Bluehelix HiTech RRT 24 C for European Markets

The Bluehelix HiTech RRT 24 C is particularly relevant to European customers searching for a compact condensing combi boiler with natural-gas/LPG capability, Class 6 NOx performance and instantaneous domestic hot water.

For European orders, verify:

• Fuel configuration
• Gas category
• Local gas pressure
• Flue requirements
• Heating-system requirements
• Water pressure
• Electrical supply
• Installation clearances
• Local certification
• National gas and building regulations

Requirements can differ between European countries, so the exact appliance configuration should be checked for the destination market.

Professional Installation

The Ferroli Bluehelix HiTech RRT 24 C is a gas boiler and must be installed and commissioned by an appropriately qualified heating professional.

The installer should verify:

• Gas supply
• Gas pressure
• Heating-system design
• Water pressure
• Flue configuration
• Condensate drainage
• Expansion and system pressure
• Electrical connection
• Boiler controls
• Required clearances
• Local regulations
• Manufacturer installation requirements

Do not attempt gas, flue or boiler installation without the appropriate qualifications.

Ferroli Bluehelix HiTech RRT 24 C vs 28 C

The 24C and 28C are part of the same Bluehelix HiTech RRT combi-boiler family, but their heating and domestic-hot-water specifications differ.

These figures come from Ferroli’s published HiTech RRT technical data.

The appropriate model depends on the property’s heating load and hot-water demand rather than simply choosing the larger nominal model number.

Frequently Asked Questions

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

Yes. It is a wall-hung condensing combi boiler with instantaneous domestic hot-water production.

What is the heating output of the Ferroli 24 C?

The maximum useful heating output is 20.0 kW at 80/60°C and 21.6 kW at 50/30°C.

What is the domestic hot-water output?

The maximum domestic hot-water thermal output is 24.5 kW.

What is the hot-water flow rate?

The Ferroli Bluehelix HiTech RRT 24 C provides approximately 11.7 L/min at a 30°C temperature rise and approximately 14 L/min at a 25°C temperature rise.

Is the Ferroli Bluehelix HiTech RRT 24 C condensing?

Yes. It is a high-efficiency condensing combi boiler with a stated seasonal space-heating efficiency of 94%.

Is the Ferroli 24 C suitable for LPG?

The Bluehelix HiTech RRT range is designed to operate with natural gas and LPG through Ferroli’s M.G.R. configuration. Confirm the exact supplied configuration before installation.

Is the boiler Low-NOx?

Yes. The 24C has Class 6 NOx classification under EN 15502-1.

What is the modulation ratio?

The 24C has a modulation ratio of up to 1:7.

What are the dimensions?

The HiTech RRT 24 C measures approximately 700 mm high × 400 mm wide × 320 mm deep and weighs approximately 28.4 kg.

Is it suitable for European installations?

It can be suitable for appropriate European installations, subject to the exact fuel configuration, certification and requirements of the destination country.

Buy Ferroli Bluehelix HiTech RRT 24 C in Europe

The Ferroli Bluehelix HiTech RRT 24 C is a wall-hung condensing combi boiler combining central heating, instantaneous domestic hot water, stainless-steel heat-exchanger technology, Class 6 NOx performance and natural-gas/LPG capability.

For European customers, confirm the required fuel configuration, flue arrangement and destination-country installation requirements before ordering.