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We understand that installing a new gas heating system is a major investment for your home. To help you make an informed decision, we’ve answered some of the most common questions our customers ask about gas boiler installation, efficiency, safety, and maintenance. If you have a question that isn’t covered below, our team will be happy to assist you directly.

Our gas heating installation service includes the supply and installation of your new gas boiler or heating system, all necessary pipework, system flushing, and safety testing. We also remove and dispose of your old unit and ensure your new system operates efficiently before completion.

Most standard installations are completed within one working day, though larger or more complex systems may take two. We always confirm an estimated timeframe during the site assessment so you can plan accordingly.

In most cases, yes. Older boilers are often inefficient and incompatible with modern heating controls. Replacing them ensures optimal performance, safety, and compliance with current energy regulations.

Gas Boiler Sizing is an important aspect of an installation or replacement, and it’s usually very easy to figure it out. If you are considering upgrading or replacing your existing boiler it is important to think about the hot water and heating requirements of your home.

The size of the boiler you will need directly relates to the output rating your property requires. Simply put the greater number of radiators you have, the larger boiler you will need.

When we discuss boiler size, we are not referring to the physical dimensions, but rather the amount of output. Choosing the correct size boiler helps to run your heating system more efficiently and reduce energy bills.

While there is no quick and easy rule for the size of the boiler you will need. There are some guidelines which you can use to help decide the optimum gas boiler size.

A common mistake people make when selecting a new boiler for a small house or flat is getting a boiler which has too large an output. This can cause energy bills to rocket.

For a small house or flat with approximately 10 radiators or less, we recommend a system with an output of 9-18 KW. Prices from €2095 + VAT (13.5%).

Basing our estimations of a 3-bedroom house having between 10-15 radiators, you should be looking at a boiler size with an output of 18-26 KW. Of course, if you have a larger number of radiators within your property it is worth getting in touch with one of our registered gas engineers. Prices from €2195 + VAT (13.5%).

If you have a 4-bedroom house, it is likely that you may have more than one bathroom. Based on an estimate of a 4-bedroom house having between 15-20 radiators, we would advise a boiler with an output of 25-30+ kw or preferably more. Prices from €2249 + VAT (13.5%).

Choosing the right size boiler in a large house with multiple bedrooms and bathrooms is crucial. While each house is individual and unique, we offer a guideline of a boiler with an output of 35kw or more. In order to ensure you get the perfect boiler, get in touch with one our team who will be able to provide consultation and a quote for your new boiler. Prices from €2795 + VAT (13.5%).

Yes, Grants of up to €6,000 are available to homeowners of houses built before 2006. These grants are not income related – anyone can apply regardless of income. For more information on this refer to The Better Energy Homes grant scheme.

Yes, Gas boiler financing offers the average Irish family home the opportunity to access a high quality gas boiler that is fully installed by our expert team at a reasonable month to month payment plan that fits in with the family budget.

Gas boiler financing generally is secured against your new gas boiler unit and therefore our finance partner is able to provide even more competitive interest rates. You will get a fixed amount to pay each month that fits in with your monthly budget and will potentially even save you money in energy bills for many years to come.

Yes. All our gas heating engineers are RGI (Registered Gas Installer) certified and trained to meet Irish safety and quality standards. You can rest assured your installation will be fully compliant and safe.

Yes. Modern gas boilers are up to 90% more efficient than older models. By upgrading, you could save up to 40% on your annual heating bills, depending on your current system’s age and condition.

Absolutely. All new gas boilers come with a manufacturer’s warranty (typically 5–10 years), and our workmanship is covered by our own installation guarantee for added peace of mind.

We recommend clearing access to your boiler area and ensuring someone is home to provide entry. Our team handles everything else—from system removal to clean-up—leaving your home tidy and your heating ready to use.

Yes, we provide annual gas boiler servicing and maintenance plans to keep your system running efficiently and safely year-round. Regular servicing also protects your warranty and helps prevent costly repairs.

Yes. We are fully insured, including public liability and employer’s insurance, for your complete peace of mind. This ensures you’re protected in the unlikely event of any damage or issue during the installation process.

Gas Boiler Prices from €1,895

Prices For Supply & Installation In Dublin – No Hidden Fees

Ideal Boilers was founded in 1906, with over 100 years of providing the best quality boilers to our customers continually working to meet ever-changing domestic heating needs. Being built on its rich heritage, Ideal’s company values are to look into the future with adding value, quality and innovation.

Ideal Gas Boilers

Ideal Logic System 15kW

  • Capacity:  Up to 8 radiators

  • Warranty:  7 Years

  • Price:  from €1,895

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Ideal Gas Boilers

Ideal Logic System 18kW

  • Capacity:  Up to 10 radiators

  • Warranty:  7 Years

  • Price:  Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Ideal Gas Boilers

Ideal Logic System 24kW

  • Capacity:  Up to 12 radiators

  • Warranty:  7 Years

  • Price: Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Ideal Gas Boilers

Ideal Logic System 30kW

  • Capacity:  Up to 14 + radiators

  • Warranty:  7 Years

  • Price: Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector

Ideal Logic versus Ideal Logic Max? The main difference between the Ideal Logic and Ideal Logic Max series lies in the warranty length and some additional features. The Logic Max models come with a longer warranty, typically up to 10 years, compared to the standard Logic series, which usually offers a shorter warranty period.

Ideal Max

Ideal Max 18kW

  • Capacity:  Up to 10 radiators

  • Warranty:  10 Years

  • Price:  from €2,095

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Ideal Max

Ideal Max 24kW

  • Capacity:  Up to 14 + radiators

  • Warranty:  10 Years

  • Price:  Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Ideal Max

Ideal Max 30kW

  • Capacity:  Up to 16 + radiators

  • Warranty:  10 Years

  • Price: Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector

Worcester Engineering Co was founded in 1962 by Cecil Duckworth and in 1992 acquired by Robert Bosch adopting the new name of Worcester Bosch Group. Worcester has a loyalty scheme where you can buy an extended warranty to your boiler.

Worcester Bosch Boilers

Worcester Bosch 18i

  • Capacity:  Up to 10 radiators

  • Warranty:  6 Years

  • Price:  from €2,195

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Worcester Bosch Boilers

Worcester Bosch 24i

  • Capacity:  Up to 12 radiators

  • Warranty:  6 Years

  • Price:  Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Worcester Bosch Boilers

Worcester Bosch 30i

  • Capacity:  Up to 14 + radiators

  • Warranty:  6 Years

  • Price: Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector

The Viessmann Group is a family owned business founded in 1917. Their systems have been awarded multiple times. The company’s core values are to act responsibly and maintain the balance between ecology, social responsibility and economy. Veismann tries to meet the needs of our generation without compromising the quality of life of the future.

Viessmann Boilers

Viessmann Vitodens 100-W 19kW

  • Capacity:  Up to 10 radiators

  • Warranty:  10 Years

  • Price:  from €2,295

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Viessmann Boilers

Viessmann Vitodens 100-W 25kW

  • Capacity:  Up to 12 radiators

  • Warranty:  10 Years

  • Price:  Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Viessmann Boilers

Viessmann Vitodens 100-W 32kW

  • Capacity:  Up to 14 + radiators

  • Warranty:  10 Years

  • Price: Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector
Viessmann Boilers

Viessmann Vitodens 100-W 35kW

  • Capacity:  Up to 16 + radiators

  • Warranty:  10 Years

  • Price: Enquire below

  • Gas Boiler Prices include:

    • Magnetic Filter
    • Heating Inhibitors
    • Chemical Flush
    • Carbon Monoxide Detector

What is a system boiler?

Ideal Logic System boiler

Viessmann Vitodens 100 range

Save up to 40% on your Gas Bills

Every gas boiler loses efficiency over time. Replacing your old boiler could save you up to 40% on energy bills. As boilers age, they require more power to produce the same heat, making them less cost-effective. Upgrading to a new, efficient model can help you cut costs and avoid wasting money on repairs. Contact our team today to see if it’s time for a replacement.

Most Irish homes follow standard layouts, and if you’re unsure of your measurements, our team will determine the ideal gas boiler for your property. We exclusively recommend high-efficiency, modern models to ensure maximum performance, energy savings, and long-term value from your investment.