Ferroli 25S System Boiler + Heating Controls

The Ferroli 25S System Boiler is part of the Ferroli’s new range of wall-mounted A-rated Modena HE boilers has set a new standard for the domestic market. As a high performance, energy efficient and affordable appliance, the Modena HE is unbeatable in its class.


Ferroli 25S System Boiler


Save Money

Save up to 30% on your Energy Bills

5 Year Warranty

5 Year Parts & Labour Warranty

Expert Installers

Directly Employed Expert Installers

Ferroli 25S System Boiler Package Includes:

    • Ferroli 25S System Boiler
    • Entry Level Heating Controls
    • Boiler removal & installation
    • Horizontal flue
    • Upgrade & extension of gas line (1-1.0m)
    • Comes with integral filling loop
    • No plate to plate heat exchanger or diverter valve
    • Boiler condensate connected into internal waste
    • Power Flush your Central Heating System
    • Gas commisioning of system
    • Maximum operating temperature 90°C
    • Only 4 moving parts – pump, fan, gas valve and DHW water flow meter
    Central flueing for easy replacement installations



Ferroli 25S System Boiler Features & Benefits:

The Ferroli 25S System Boiler is so compact that it can be sited virtually anywhere and because it is extremely lightweight, installation can be completed with only one pair of hands. It’s so easy to fit that it takes less time to install than comparable boilers which allows for cost savings to be passed on to the customer for an attractively priced job. An exceptionally low operating noise level means it’s barely audible.

With only four moving parts – pump, fan, gas valve and DHW water flow meter – and no plate to plate heat exchanger or diverter valve, the Ferroli 25S System Gas Boiler guarantees exceptional reliability and is very easy to service and maintain.

The Ferroli 25S System Boiler more than meets consumer demand for constant heat and hot water whilst saving them money on fuel bills and helping them to reduce their carbon footprint.


    • NOx Class 5+ & SEDBUK A rated for extremely low emissions and high performance
    • Operates on both natural gas and LPG
    • No plate to plate heat exchanger or diverter valve
    • Only 4 moving parts – pump, fan, gas valve and DHW water flow meter
    • New unique stainless steel innovative bi-thermal heat exchanger
    • Robust stainless steel burner for long life
    • Comes with integral filling loop
    • Condenses in hot water mode
    • Central flueing for easy replacement installations
    Maximum operating temperature 90°



When should I get a Gas Boiler Replacement?

The Sustainable Energy Association of Ireland (SEAI) recommends that you should replace or upgrade your gas boiler if it is more than 15 years old. Even if there are no apparent problems, it’s unlikely to be running above 70% efficiency (new gas boilers are more than 90%) and reliability is likely to be an issue.

    • Help it run more efficiently, reducing your heating costs
    • Reduce your heating costs by up to 25%
    • Improve reliability and safety
    Improve your Building Energy Rating (BER)



How Much Can I Save by Getting a Gas Boiler Replacement?

Save up to 20% operational improvement in efficiency. That means more than 25% in fuel savings. Combine it with zoned controls and your savings can increase to over 35%.

In other words, you can cut your fuel bills by a third by replacing an older, low efficiency gas boiler with a high efficiency gas boiler and zoned controls.



Get a Free Gas Boiler Replacement Quote

1. Contact our office

Gas Boiler Replacement Contact
Contact our office by phone ( 01 514 3344 ) or email and we will arrange a time and day for our sales rep to call out to you.

Book Call Back Online

2. Sales rep visit

Gas Service Van
We pass on your details to our sales rep and they will call to let you know when they will be arriving. (There is no charge for visit)

Book Call Back Online

3. Free written quotation

Gas Boiler Upgrade Quote
The sales rep will survey what works need to be done and will give you a free written quotation for the gas boiler replacement.

Book Call Back Online

Please Note * If earth bonding is required in the installation of the boiler to bring it up to current regulations I.S. 813, there will be an additional flat rate fee of €350 for up to 10 metres of bonding.

Customer Testimonials

DeWAR Gas Service

We provide 24/7 emergency Dublin Gas & Oil Boiler Services, Repairs and Replacements to 1000’s of customers for their homes and business all around Dublin.

Contact Us Today


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