RGI & SEAI Registered Installers

Boiler Replacement & Upgrades

Q: How do I know if I need a new boiler?

If your boiler is over 10–15 years old, breaks down often, makes unusual noises, or struggles to heat your home or supply hot water, it may be time to replace it. A modern condensing boiler can improve efficiency, reduce energy bills and give more reliable heating.

Q: What is the difference between a gas and an oil boiler?

Gas boilers connect to the natural gas network and are generally more cost-effective and easier to install where mains gas is available. Oil boilers suit homes without a gas supply and run on stored heating oil. Modern oil boilers are highly efficient and ideal for rural or off-gas properties.

Q: Do I need to replace my radiators when replacing a boiler?

Not always. Radiators only need replacing if they are damaged, incompatible with the new system or affecting efficiency. A heating assessment will confirm whether any upgrades are needed, and in most cases they aren't.

Q: How long does it take to install or replace a boiler?

Most boiler replacements are completed in a single day. More complex systems, or those needing extra pipework or controls, can take longer. We give you a clear schedule before work starts.

Q: Do I need a certified engineer for installation?

Yes. In Ireland, all work on domestic natural gas installations, including installing, replacing or servicing gas boilers, must be carried out by a Registered Gas Installer (RGI).

Q: Can I improve energy efficiency with my new boiler?

Yes. Modern condensing boilers are much more efficient than older models, often saving up to 30% on heating bills. We can also recommend controls, thermostats and system upgrades to maximise efficiency and comfort.

Q: Do you provide servicing after installation?

Yes. Regular servicing is essential for safe and efficient operation. We offer maintenance packages for gas and oil boilers, including annual safety checks, cleaning and system optimisation.

Q: How much does boiler replacement cost?

Cost depends on the boiler type, size, brand and installation complexity. The price typically includes the new unit, labour, removal of the old boiler and any system upgrades required. We need to inspect your system to give an accurate quote.

Upgrade or replace your boiler with confidence. Our certified registered engineers install high performance gas and oil boilers, ensuring reliable heating, lower energy costs and full compliance with safety standards across Dublin, Meath, Kildare & Louth.

Boiler Replacement

Boiler Replacement & Installation for Homes and Businesses

Whether your boiler has broken down, is nearing the end of its lifespan, or you want to upgrade to a more efficient model, our experienced heating engineers deliver fast, reliable boiler installation services for residential and commercial properties. We install all major boiler brands and can often complete replacements within one day, minimising disruption to your home or business. For properties considering renewable heating, we also provide advice on transitioning to heat pump systems as an alternative to conventional boiler replacement.

Gas Boiler Replacement

Replace your old gas boiler with a modern, high-efficiency model. Fitted by RGI registered installers, usually in a single day.

Oil Boiler Replacement

Upgrade your ageing oil boiler for a more efficient, reliable one. Fitted properly and usually done in a single day.

Past Projects

Recent Boiler Replacement Projects

Here are a few of our most recent Gas & Oil Boilers we’ve installed with the attention to detail and quality our customers have come to expect from our team.

Benefits

4 Benefits Of Replacing Your Old Boiler

Reduce Energy Costs

Modern condensing boilers are far more efficient than older models, so more of your fuel becomes heat. That means a lower bill for the same comfortable home.

Fewer Breakdowns

An old boiler that keeps failing costs you in call-outs and cold mornings. A new one gives you dependable heating, backed by a warranty.

Safety Standards

A new boiler is installed by registered installers and meets current safety standards. That gives you peace of mind, especially compared with an ageing unit.

Control & Comfort

New boilers work with smart thermostats and zoned controls, so you heat only what you need, when you need it. Your home warms up faster and stays comfortable.

Our Process

From Consultation To New Boiler In 3 Simple Steps

We keep it quick and hassle-free. Most boiler replacements are done in a single day, so you’re never without heating for long.

Step 1

Free Quote Consultation

We check your current boiler, pipework and controls, then talk through your options. You get a clear, fixed quote with no obligation.

Step 2

Installation

We remove your old boiler and fit the new one, with heating and hot water back on the same day wherever possible.

Step 3

Handover

We test and commission the system, then show you how to use your new controls to get the best from it.

Brands We install

We install new gas & oil boilers and replace old systems with the latest energy efficient models. Modern condensing gas boilers are designed to save energy, reduce heating costs, and provide reliable hot water and heating for your property. We work exclusively with the industry leading Viessmann boilers when replacing or installing new boilers.

Our Qualifications

Why Choose Dawson Mechanical & Renewables

Your safety and satisfaction are our top priorities. We follow the highest industry standards, all health and safety regulations, ensuring every job is safe, legal and of exceptional quality. With ongoing training and certifications including RGI, SEAI and the National Guild of Master Craftsmen you can trust Dawson Mechanical and Renewables to deliver expert heating, plumbing and renewable solutions you can rely on.

FAQ

Boiler Replacement FAQ

Choosing a new boiler or replacing an old system can raise a few important questions. Below are answers to the most commonly asked questions about gas and oil boiler installation, replacement, and maintenance. This guide will help you understand your options and make an informed choice for your property.

How do I know if I need a new boiler?

If your current boiler is over 10–15 years old, frequently breaks down, makes unusual noises, or struggles to heat your home or supply hot water, it may be time to replace it. Upgrading to a modern gas or oil condensing boiler can improve efficiency, reduce energy bills, and provide more reliable heating.How do I know if I need a new boiler?

What type of boiler should I choose?

The best boiler depends on your home size, hot water demand, and existing heating system. Common options include combi boilers, system boilers, and conventional boilers. Dawson mechanical and renewables heating and plumbing experts can recommend the right size and model for efficiency and performance.

What is the difference between a gas and an oil boiler?

Gas boilers are connected to the natural gas network and are generally more cost-effective and easier to install if mains gas is available. Oil boilers are used in homes without gas supply and rely on stored heating oil. Modern oil boilers are highly efficient and ideal for rural properties or off-gas locations.

Do I need to replace my radiators when replacing a boiler?

Not always as radiators only need replacement if they are damaged, incompatible with the new system, or affecting efficiency. A heating assessment will determine if upgrades are necessary, it’s more the exception than the rule in most cases.

How long does it take to install or replace a boiler?

Most replacements are completed in a single day. Larger or more complex systems may take longer, but we provide a clear schedule before starting work.

Do I need a certified engineer for installation?

In Ireland, it is a legal requirement that all work carried out on domestic natural gas installations, including the installation, replacement or servicing of gas boilers, must be performed by a Registered Gas Installer (RGI)

Can I improve energy efficiency with my new boiler?

Modern condensing boilers are much more efficient than older models, often saving up to 30% on heating bills. We can also recommend controls, thermostats, and system upgrades to maximise energy efficiency and comfort.

Do you provide servicing after installation?

Yes, regular servicing of your boiler is essential for safe and efficient operation. We offer maintenance packages for both gas and oil boilers, including annual safety checks, cleaning and system optimisation.

How much does boiler replacement cost?

Boiler replacement costs vary depending on the boiler type, size, brand, and installation complexity. The total price typically includes the new unit, labour, removal of the old boiler and system upgrades if required. A professional inspection is needed for an accurate quote.

Areas Covered

Boiler Replacement Covering Dublin, Meath, Kildare & Louth

Based in Kilcloon, Co. Meath, we replace gas and oil boilers for homeowners across Dublin, Meath, Kildare and Louth. Outside these areas? Get in touch, as we’re happy to travel depending on the job. Every project starts with a free, no-obligation quote.

Replacement Quote

Schedule A Free Boiler Replacement Quote Consultation

We’ll start with a quick chat to understand what you need, then check your current boiler, pipework and controls and give you a clear, fixed quote with no obligation. Most replacements are done in a single day, so you’re never without heating for long. We cover Dublin, Meath, Kildare and Louth.