Check the current SEAI scheme, eligibility, application order, registered-contractor requirements and eligible control specification before ordering work. Grant rules and amounts change, so a quotation or article cannot confirm approval.

As checked on 6 September 2026, Irish public guidance listed a €700 heating-controls upgrade grant. Recheck SEAI immediately before publication and before any commitment.

Confirm the measure

The controls grant concerns eligible heating-control improvements such as appropriate zoning and time/temperature control. It is not a general boiler-replacement grant and is distinct from heat-pump support.

Ask the contractor to identify the eligible measure, equipment, zones, commissioning and documentation. A retail smart thermostat alone may not meet scheme requirements.

Follow the sequence

1. Read the current SEAI terms.
2. Check property/applicant eligibility and previous grants.
3. Apply and obtain the required approval before starting or committing where the scheme requires it.
4. Use the required registered contractor route.
5. Complete work to the eligible specification.
6. Collect declarations, invoice and grant claim documents.
7. Retain records and complete any required assessment.

Never start early based on an assumption that approval will be backdated.

Compare net cost honestly

Keep gross quote, eligible cost, confirmed grant and household contribution separate. Do not subtract the grant until approval and amount are documented. Compare any maintenance, subscription or additional plumbing/electrical work.

Frequently asked questions

Should I apply before work begins?

Check current SEAI rules and obtain required written approval before committing. Starting early can affect eligibility.

How does this differ from a heat-pump grant?

It funds a controls measure under its own rules; heat-pump support has different technical, assessment and contractor requirements. Confirm whether schemes can be combined.

Suggested on-page component

Use a dated SEAI Controls Grant Readiness Checklist that links to the official scheme and refuses to calculate a grant until the user enters a confirmed amount.

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For regulated domestic gas work in Ireland, verify the installer through the Registered Gas Installer scheme before work and ask for the appropriate completion certificate afterwards. UK Gas Safe registration is not the Irish verification route.

Before booking

Search the official RGI register using the installer’s details. Ask who will attend, confirm the work falls within the registered scope and keep the written quotation. If the person does not appear, contact the RGI scheme rather than relying on a badge or screenshot.

At the appointment

Ask to see the current RGI identification. Check the photograph, number and year, and compare them with the register. Do not allow regulated gas work to proceed if identity or status cannot be confirmed.

Completion documents

RGI guidance states that when an RGI carries out gas work, the appropriate completion certificate is issued to the person who requested it. The certificate type depends on the work; do not assume a service, repair and boiler replacement use the same form.

Keep the certificate with the invoice, commissioning record, appliance manual, guarantee registration and service requirements. Ask the RGI to explain any notification or follow-up relevant to the job.

Frequently asked questions

What if an installer does not appear in the online search?

Pause the booking and contact the RGI scheme with the exact name and number. Do not accept a logo as a substitute.

What paperwork should I ask about for replacement?

The appropriate RGI completion certificate, commissioning information, invoice, control instructions and guarantee registration. Confirm the certificate type with RGI.

Suggested on-page component

Use an Ireland Gas-Work Checklist linking directly to Find an RGI and recording ID, scope and documents without claiming independent vetting.

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Steam and hot-water systems may both use radiators, but their boiler, piping, controls and operating principles differ. Identify the system before requesting replacement quotes.

Visible clues

These clues are not a remote diagnosis. Older buildings can have modified or mixed arrangements.

Information for the survey

Record boiler label, fuel, radiator connection count, visible vents/valves, piping diagram if available, operating issues and any historic conversion documents. Do not operate unfamiliar valves or dismantle vents.

Replacement scope

A steam boiler must be sized and installed for the connected radiation and steam distribution, not chosen using the same method as a hot-water boiler. A hot-water system uses building heat loss and emitter/system design. Existing radiators may remain if compatible and sound; replacement is not automatic.

Converting steam to hot water requires a specialist assessment of radiator and pipe suitability, pressure, leaks, controls and building disruption.

Frequently asked questions

What helps an engineer distinguish the systems?

Boiler controls, sight glass, circulator/expansion equipment, radiator connections, vents, piping and historic documentation.

Does replacing the boiler mean replacing radiators?

Not necessarily. Condition, output, system type and compatibility decide. Conversion requires a separate assessment.

Suggested on-page component

Use a Steam-or-Hot-Water Evidence Checklist that records visible clues and creates a contractor briefing without issuing a definitive result.

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A boiler heats water (or produces steam) and distributes heat through pipes; a furnace heats air and distributes it through ducts. In US and Canadian usage, “boiler” and “furnace” describe different system architectures, not competing names for the same appliance.

Identify what the home has

Look for radiators or hydronic baseboards and water pipes, versus supply/return grilles and large air ducts. Some homes have both, or add ductless cooling to a boiler-heated property.

Do not use a UK “combi versus system boiler” guide to choose a North American furnace. The terminology, fuel standards, codes and contractor licences differ by jurisdiction.

Replacement implications

Replacing within the same architecture usually retains distribution subject to condition and sizing. Converting between water and warm air is a building-wide project involving emitters or ducts, controls, electrical/fuel work, openings and comfort design.

Frequently asked questions

Does a boiler heat air or water?

It normally heats water or makes steam; emitters then heat rooms. A furnace directly warms air for duct distribution.

Can a radiator system be treated like a furnace system?

No. Heat-loss design applies to both, but distribution calculations, components and controls are different.

Suggested on-page component

Use a Heating-System Identifier based on visible distribution features, with “mixed/uncertain” as a valid result and no repair advice.

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A carbon-monoxide alarm is a backup warning, not a substitute for correct installation, ventilation, maintenance or servicing. Choose an alarm certified for the market, install and maintain it exactly to the manufacturer instructions, and know the emergency response before it sounds.

If an alarm sounds or CO is suspected

Leave the property, warn others and use the official gas/emergency route. Seek medical advice for possible exposure. Do not silence the alarm and re-enter to investigate the boiler yourself.

Buying and positioning

Check the current legal requirements for the property’s nation and tenure. Select a compliant alarm from a reputable source and follow its instructions for room, distance, height, obstructions and unsuitable locations. Generic placement graphics cannot override a model’s instructions.

Record model, standard marking, installation date, replace-by date, battery type and test method. Avoid buying an untraceable alarm solely on price.

Testing and maintenance

Use the test button and schedule stated by the manufacturer. Testing the electronics does not prove the room is CO-free or the boiler safe. Replace batteries or the unit when instructed and keep vents clear.

Appliance safety

Have gas work performed by a Gas Safe registered engineer in Great Britain or an RGI in Ireland. Keep boiler service and landlord safety records as applicable. Never block ventilation or alter a flue.

Frequently asked questions

Does an alarm replace a boiler service?

No. It warns of detected CO under its design conditions; it does not inspect, maintain or certify the appliance.

Where should positioning instructions come from?

The alarm manufacturer’s current manual, read alongside current rules for the nation and property type.

Suggested on-page component

Use a CO Alarm Record and Replacement Planner with manufacturer-link, test and replace-by fields. It must open with emergency guidance and never claim to verify safety.

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Treat an older boiler as a due-diligence item, not an automatic replacement bill. Identify the system, request records, understand what the survey did not test, and budget for uncertainty before exchange or completion.

Documents to request

• installation invoice and commissioning record;
• Building Regulations or other applicable compliance certificate;
• guarantee registration and terms;
• service history and recent repair invoices;
• landlord gas-safety records if the property was rented;
• manuals for boiler, controls and cylinder;
• oil-tank records for an oil system; and
• alterations to flue, chimney or protected fabric.

Missing paperwork does not diagnose the boiler, but it changes what can be verified.

What a general survey may not cover

A visual home survey is not normally a strip-down service, combustion test or performance guarantee. Read its scope and exclusions. If heating condition affects the purchase, arrange a specialist inspection with access and seller permission.

Questions during viewing

Record make/model, system type, apparent age, controls, cylinder/tanks, visible pressure, flue, leaks/corrosion, radiator condition and whether all rooms receive heat. Do not remove covers or operate unfamiliar controls without permission.

Budget scenarios

Create three allowances: no immediate work, service/minor repair, and surveyed replacement. Do not insert an online average as a certainty. Include access, controls and system condition, especially in older properties.

Frequently asked questions

Does a general home survey test the boiler fully?

Usually not. Check the survey level and wording. A specialist heating inspection has a different scope.

Which documents should I request?

Installation/compliance, commissioning, service, repairs, guarantee, manuals and any fuel-storage or protected-building records.

Suggested on-page component

Use a Homebuyer Heating Evidence Checklist that records present/missing documents and inspection questions without estimating condition.

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First identify what has stopped, check for immediate danger, then collect model and display information without opening the appliance. This helps the right engineer respond and avoids unsafe guesswork.

Emergency screen

Leave and use the official emergency route if you smell gas or a carbon-monoxide alarm sounds. Keep clear of water near electricity, fire, burning smells or visible damage and seek urgent help. Do not continue troubleshooting.

What is affected?

• Heating only
• Hot water only
• Both
• One zone or one outlet
• Intermittent operation

For a cylinder system, note whether stored hot water is exhausted or whether the heat source failed. For a combi, note what happens when a hot tap opens.

Safe observations

Follow only user checks in the exact official manual. Limit resets to what it permits.

Who to call

Use a Gas Safe registered engineer for gas work, an RGI in Ireland, or appropriately competent oil/electrical/heating support for the system. Tenants should report through the landlord’s emergency process.

Frequently asked questions

Is the issue affecting heating, hot water or both?

Test only normal user controls and outlets. This distinction helps separate a whole-appliance interruption from one circuit or control issue, but it is not a diagnosis.

Which readings and events should I note?

Exact code, pressure, control state, start time, recent work, cold weather, outage, leak, noise and any permitted reset result.

Suggested on-page component

Use a Loss-of-Service Report Builder with an emergency stop screen and official-manual link. It should never instruct internal gas or electrical repair.

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An oil-boiler replacement involves the appliance, oil storage and supply, flue, condensate, heating system and environmental risk. Do not apply Gas Safe checks to oil work; use an appropriately competent oil-heating business and the rules for the property’s nation.

Survey the fuel system

Record the tank material, approximate age, capacity, base, location, visible condition, gauge, isolation, filter and pipe route. The installer should assess separation distances, fire/environmental protection, access for delivery and whether secondary containment is required.

A working tank is not automatically suitable for a new boiler. Do not move, repair or test it yourself if damage or leakage is suspected.

Appliance and system

Request heat-loss-based sizing, exact burner/boiler specification, flue route, condensate disposal, controls, system cleaning and commissioning. For an external boiler, weather exposure, frost protection and service access matter.

Can the tank stay?

Potentially, if a competent assessment finds its condition, siting, support, containment, capacity and supply suitable under current requirements. Put retention or replacement in writing and record who is responsible for any tank work and oil transfer.

Oil disposal and spills

Agree what happens to remaining fuel, redundant equipment and contaminated materials. If a leak is suspected, protect people and drains and contact the appropriate environmental/emergency route; do not wash oil away.

Frequently asked questions

Can the existing oil tank be retained?

Yes only after a competent, documented assessment. Age alone is insufficient, but visible condition alone is also insufficient.

Which professional checks are needed?

Appliance competence, tank/supply assessment, heat loss, flue, condensate, controls, electrical work, commissioning and applicable building notification.

Suggested on-page component

Use an Oil Heating Survey Checklist with tank photos, supply route, access and environmental-risk prompts. It must not declare a tank safe.

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The total price is driven by the surveyed installation, not the boiler box alone. System conversion, location, flue, condensate, controls, supply upgrades, cleaning, access and making good can outweigh differences between appliance prices.

Build the budget by scope

Ask whether labour, materials and VAT are included and how variations are approved.

Moving the boiler

There is no universal add-on because distance is not the only factor. Moving across one room may require a new flue opening and condensate route; a longer move may follow accessible services. Request a separately itemised relocation scope.

Advertised prices

Check assumptions about property, system type, model, controls, flue length, gas supply, condensate, cleaning, parking and regional availability. A “from” price is not a quote for your home.

Use dated evidence

Market price guides become stale. Record source, access date, region and included work for every example. The on-page tool should use visitor-entered quotes rather than an invented national average.

Frequently asked questions

How much does moving the boiler add?

Only a route survey can answer. Itemise fuel, water, electrics, flue, condensate, access and making good.

Which costs can be excluded from an advertised installation price?

Conversions, long flues, supply upgrades, controls, system cleaning, scaffolding, parking, notification and making good may be outside a headline offer. Read the assumptions.

Suggested on-page component

Use an Installation Scope Budget Builder with configurable currency and blank user inputs. Show missing scope rather than market averages.

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Prepare for loss of heating and hot water, protect access routes, and reserve time for a proper controls demonstration and document handover. Installation is not complete when the casing is on the wall.

Before the team arrives

• Confirm arrival window, expected duration and named contact.
• Clear the boiler, cylinder, radiators, stopcock, meter and route between them.
• Protect valuables, floors and pets; agree who supplies coverings.
• Plan for vulnerable occupants and temporary loss of heat/hot water.
• Photograph existing finishes and meter readings.
• Reconfirm parking, keys, alarm and waste arrangements.
• Keep the written specification and variation process available.

During the work

Ask before any change to location, model, flue, controls or quoted scope. Record approved variations in writing with cost and time impact. Do not enter the work area or interfere with isolated services.

The team may drain and clean the system, alter pipework, fit controls, commission combustion and balance emitters depending on the job. The exact sequence varies.

Handover checklist

In England and Wales, qualifying gas appliance work is notified through the appropriate route and a compliance certificate follows. Other nations differ. Ask what applies before installation.

After the team leaves

Use the system as demonstrated and record unexpected codes, pressure loss, leaks, noise or rooms not heating. Contact the installer rather than altering engineer settings. Keep all documents together for servicing, claims and a future sale.

Frequently asked questions

How should I prepare the work area?

Clear safe access to every agreed location and route, remove valuables and plan for service interruption. Do not dismantle the existing appliance.

Which documents and demonstrations should I receive?

The exact list varies, but typically includes commissioning information, control manuals, invoice, guarantee registration, service requirements and applicable compliance notification.

Suggested on-page component

Provide a printable Installation and Handover Checklist with variation, document and outstanding-work fields. The download should mirror this page rather than create another indexed article.

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