Boiler installation: a homeowner's planning and handover guide

Start with the household and existing system

Explain how many bathrooms you use, when hot water demand is highest and how well the current heating performs. The installer should assess the property and existing system rather than choose an appliance from the bedroom count alone.

Discuss whether you want a like-for-like replacement, a change of location or a different system type. Those choices can affect pipework, hot water storage, controls, access and other work. A suitable specification should explain the reasoning behind the proposed equipment.

Check who will do the work

For gas work, check the engineer's Gas Safe registration and qualifications for the specific work. HSE advises consumers to verify the engineer through the register; the name on a quotation is not a substitute for checking the person attending.

Ask who is responsible for the installation, who handles any additional electrical or building work and how queries will be resolved. Do not attempt gas connections, flue work or internal appliance installation yourself. This article explains how to plan a job, not how to install a boiler.

What to cover during the survey

1. The existing boiler, heating system and hot water requirements.
2. The proposed location and the installer-assessed requirements for flue, condensate and services.
3. Radiators, controls and any system preparation or cleaning proposed.
4. Access, parking, shared areas and the expected interruption to heating and hot water.
5. Permissions or approvals that may be relevant, including landlord, factor or building arrangements.

Compare written scopes, not just totals

Ask for the appliance model and an itemised description of the included work. A lower price may cover a different appliance, fewer controls or less associated work. Clarify removal and disposal, making good, testing and what happens if an unexpected problem is found.

Agree how variations will be explained and authorised before extra work proceeds. Ask about the estimated programme and practical preparations, but avoid treating a generic installation duration as a guarantee for your property. Access and the extent of alterations make a difference.

What a useful handover should explain

At completion, ask the installer to demonstrate the controls and explain the normal user checks for your equipment. Retain the manual, installation and commissioning records, invoice and warranty information. Clarify which registrations or notifications apply to this installation and who completes them.

Read the warranty conditions, including any maintenance requirements and registration deadline. Confirm the contact route for a problem after installation. A clear handover helps you distinguish a normal setting adjustment from a fault that needs professional attention.

Planning a replacement in an Edinburgh flat

Tell the installer about your floor, entry arrangements and any shared access. If alterations could affect shared parts of the building, ask what approvals need checking. Do not assume a neighbouring flat's installation makes the same arrangement suitable for yours.

For rented accommodation, arrange the work through the person authorised to approve it. If a change to low-carbon heating is being considered, compare the whole system and seek a property assessment before committing to a replacement gas appliance. See our separate guide to heating alternatives for the questions to ask.