Boiler Installation & Replacement

Conventional Boiler Installation

A conventional (heat-only) boiler installation is a planned upgrade or replacement that restores dependable heating and hot water in homes and small premises with a hot water cylinder. The service focuses on correct boiler selection, safe installation, and thorough commissioning so the system runs efficiently and meets current UK safety and building requirements.

More information

What the service covers

A conventional boiler installation is designed to deliver reliable performance and a clean handover, with minimal disruption.

Typically, the service includes:

  • A pre-install assessment of your existing boiler, cylinder, controls and pipework
  • Advice on suitable boiler output and compatibility with your current system
  • Safe isolation and removal of the old boiler (and related components where agreed)
  • Installation of the new heat-only boiler and connection to heating and hot water circuits
  • Upgrades to key safety parts where required (for example, valves, condensate routing, flue components)
  • Commissioning, performance checks and system balancing
  • Gas Safe sign-off and relevant compliance paperwork
  • A clear walk-through of controls, settings and basic user care

Who this service is for

This is usually the right choice if:

  • Your property has a hot water cylinder and cold water storage tanks
  • You want to keep the existing conventional system layout
  • Your current boiler is failing, inefficient, or no longer economical to repair
  • You are renovating and need a planned, compliant boiler replacement
  • You are a landlord or facilities lead needing reliable, document-ready work

How installation is delivered

Work normally follows clear stages:

  1. Site survey and checks: system type, flue route, ventilation, gas supply, pressure and controls.
  2. Installation day: protect the work area, isolate services, remove old equipment and fit the new boiler.
  3. Commissioning: test gas tightness, set up the boiler, verify hot water and heating operation, and confirm safe flue performance.
  4. Handover: explain controls, outline what to monitor, and provide required documentation.

Timing depends on access, condition of existing pipework, and whether controls or associated parts need updating.

After the installation

You get a system that has been tested and set up correctly, plus the documents you need for records, insurance, and lettings. To protect efficiency and reliability, plan routine servicing and address any early warning signs such as pressure drops, unusual noise, or uneven radiator heating.

Frequently Asked Questions

What is a conventional (heat-only) boiler?
A conventional boiler heats water for your radiators and heats a separate hot water cylinder for taps and showers. It is commonly used in properties that already have a cylinder and often cold water storage tanks.
Can you replace my old conventional boiler with the same type?
In many cases, yes, provided the existing system is suitable and meets current safety requirements. A survey confirms compatibility, correct boiler sizing, and whether any updates to flue, controls or safety components are needed.
Do I need to keep my hot water cylinder?
A heat-only boiler works with a hot water cylinder, so the cylinder normally stays in place. If you want to change to a different setup, you would need a separate assessment to discuss alternatives and any pipework changes.
How long does a conventional boiler installation take?
Many straightforward replacements can be completed in a day, but it can take longer if pipework, controls, or the flue route need modifications. You will be advised of expected timings after the site checks.
What paperwork will I receive after installation?
You should receive Gas Safe documentation and confirmation of compliance where applicable, along with commissioning details. You will also be shown how to use the controls and what to do if you notice a fault.

Related Services

Complete your experience with these services

  • System Boiler Installation
    View
  • Replacement Boiler with Powerflush
    View
  • Oil Boiler Installation
    View
  • LPG Boiler Installation
    View
Show more services
  • Combi Boiler Installation
    View
  • Boiler Upgrade
    View
  • Boiler Replacement
    View
  • Boiler Relocation
    View
  • Boiler Installation with Controls Upgrade
    View
  • Boiler Installation for Landlords
    View
  • Boiler Installation Survey
    View
  • Boiler Installation & Commissioning
    View
  • Boiler Installation
    View
  • Boiler Conversion
    View