If you’re looking to get a new boiler installed you may be wondering what the process is to getting one is.  Let the expert heating engineers at T.Griffin explain.


Installing a new boiler is a significant investment that requires careful planning and execution to ensure optimal performance and safety. Whether you’re upgrading your existing heating system or installing a boiler in a new property, following a step-by-step guide can help simplify the installation process and avoid common pitfalls. Here’s a comprehensive overview of the steps involved in boiler installation:

Step 1: Assess Heating Needs

Before selecting a new boiler, assess your heating needs based on the size of your property, hot water demand, and desired energy efficiency. Consider factors such as boiler type (combi, system, or regular), fuel type (gas, oil, or electric), and efficiency ratings to determine the best option for your requirements and budget.

Step 2: Choose a Qualified Installer

Hiring a qualified and experienced installer is crucial for ensuring a successful boiler installation. Look for Gas Safe registered engineers or OFTEC technicians with relevant certifications and experience in installing boilers. Research local plumbing and heating companies, read reviews, and obtain multiple quotes to compare prices and services.

Step 3: Site Survey

Once you’ve selected an installer, schedule a site survey to assess the existing heating system, pipework, and ventilation requirements. The installer will evaluate the suitability of the chosen location for the new boiler, identify any potential obstacles or modifications needed, and provide recommendations for the installation process.

Step 4: Boiler Selection

Based on the site survey and heating needs assessment, select the most suitable boiler model and size for your property. Consider factors such as heating capacity, hot water demand, energy efficiency, and budget when choosing the boiler. Consult with your installer to ensure compatibility with existing components and compliance with building regulations.

Step 5: Installation Preparation

Prior to installation day, prepare the site by clearing the area around the boiler location and ensuring access for the installer. Arrange for any necessary permits or approvals from local authorities, if required. Disconnect and remove the old boiler and prepare the space for the installation of the new boiler and associated components.

Step 6: Boiler Installation

On the scheduled installation day, the installer will begin by assembling and positioning the new boiler in the designated location. They will connect the boiler to the existing pipework, flue system, and electrical supply, following manufacturer’s instructions and building regulations. The installer will also install any additional components, such as thermostats, valves, and controls, as needed.

Step 7: Testing and Commissioning

Once the boiler is installed, the installer will conduct thorough testing and commissioning to ensure proper operation and safety. They will check for leaks, test the pressure and flow rates, adjust settings, and verify compliance with building regulations. The installer will also provide instructions on how to operate and maintain the boiler for optimal performance.

Step 8: Handover and Documentation

After completing the installation and testing, the installer will provide you with documentation, including a commissioning certificate, user manual, and warranty information. They will explain the features and controls of the new boiler and answer any questions you may have. Ensure you understand how to operate and maintain the boiler properly to maximise its lifespan and efficiency.

Step 9: Follow-Up Service

Following boiler installation, schedule a follow-up service with your installer to ensure everything is functioning correctly and address any issues or concerns. Regular servicing and maintenance are essential for prolonging the lifespan of the boiler, maintaining efficiency, and ensuring safety.


Boiler installation is a complex process that requires careful planning, skilled labour, and adherence to safety regulations. By following a step-by-step guide and hiring a qualified installer, you can ensure a smooth and successful installation process, providing reliable heating and hot water for your home or business.


If you’re ready to get a new boiler installed in Bognor RegisMiddleton on SeaElmer

FelphamAldwick or Rose Green the surrounding areas please in get in touch to discuss your requirements.


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Our experienced and helpful staff are always happy to help, get in touch today.