Considerations Before Installing a New Boiler

Mar 30, 2023

Installing A New Boiler


Having a new boiler installed or replaced can be a big decision. Of course, if your existing boiler is beyond repair then it may not be a decision you have to make, as it will be decided for you, but there are still things to consider, and to ensure you get the replacement of your boiler done right.


Installing a new boiler is a significant investment. Choosing the right company to install it and ensuring the boiler will be reliable and suitable for your home or business is critical to ensure it will give you years of fault-free service.


Here's our guide to help you prepare for your new boiler installation:


Choose the Right Boiler


Before installing a new boiler, you need to choose the right one for your home. Consider factors such as your budget, heating requirements, and fuel type. Consulting with a professional heating engineer can help you make an informed decision.

There are 3 main types of boilers, these are:


  • Combi boiler - this heats water instantly when you turn on a hot tap of the heating
  • System boiler - suitable for larger homes with 3-5 bathrooms
  • Conventional boilers - usually found in older homes with a hot water cylinder, and are more often the type we are asked to replace due to age, failure or inefficiency


To find out more about the different types of boilers, please visit our boiler types page

Learn About Boiler Types

Get Quotes


It's essential to get quotes from different plumbing and heating companies to ensure you're getting a competitive price. Ensure the quote includes the cost of the boiler, installation, removing the old boiler and any additional work that may be required.


If the plumber you choose is local plumbing and heating firm, this will likely include a visit to the premises, however, this is actually a good thing as it can help the plumber to assess the existing boiler (you never know, it may still be repairable), the pipework to ensure it’s suitable for the type of boiler they will be replacing and also the size and type of home or business premises, as this can all help them to recommend the best boiler for both you, your property and your pocket.


Choose a Professional Boiler Installer


Choose a professional heating engineer to install your new boiler. Look for a reputable company that is Gas Safe registered and has experience in boiler installation. Don't be afraid to ask for references and check online reviews to check they are a trusted local trader before making a decision.  And do not be pressured into a sale, as you must feel comfortable with the company and the heating engineer that you choose.


Many national companies advertise boiler replacement services, and these can offer some good deals but do ensure you give them as much information as possible, as the first time you may see the engineer is when they appear at your door to install the new boiler, and if the pipework or house size has been incorrectly assessed, the installation prices can quickly escalate unexpectedly from your original budget.


Prepare Your Home for your New Boiler


Before the installation day, prepare your home by clearing the area around the boiler and ensuring there's enough space for the engineer to work. If you have pets, or young children make sure they're safely secured away from the work area.


Boiler Installation Day


On the day of the boiler replacement installation, the engineer will remove your old boiler and install the new one. They will also check for any leaks and ensure everything is working correctly. The engineer should provide you with instructions on how to use and maintain your new boiler.


You can usually get an estimation from the plumber ahead of time on how long the boiler installation may take, but for the average house boiler installation you should expect the installation to take most of the day, and you will be without heat for most of that, and without water for a portion of the day also, so it may be worth pre-filling the kettle and some bottles or saucepans with water ahead of time so you have plenty to drink and cook with, and also ensure everyone in the house has had a bath or shower before the work begins.

Boiler Replacements

After the Boiler Installation


After the installation, your engineer will provide you with a Gas Safe certificate to confirm that the new boiler installation has been carried out safely and to the required standards. Make sure you keep this certificate in a safe place.

You will need to maintain the servicing of your new boiler to benefit from the warranty supplier with it, and your plumber or heating engineer should be able to advise on the ongoing maintenance required.  If it's a local plumber who is doing the work, they may have a process in place to remind you of annual boiler servicing to maintain your warranty, so do remember to ask.


Installing a new boiler can improve the energy efficiency of your home and provide you with reliable heating and hot water. By following this guide and choosing a professional boiler installer, you can ensure a successful boiler installation and a warm and comfortable home.


Do you need a boiler replacement?


If your boiler is not working, is over 10 years old, makes a lot of noise, or is out of warranty and is frequently breaking down then it may be time to consider installing a new replacement boiler.


To assess your existing boiler and heating system or for a free no obligation quotation contact Assett Plumbing, your local Gas Safe registered heating engineer who can advise you if your boiler needs to be repaired or replaced. 

Assett Plumbing For Boiler Installations


Contact Assett Plumbing today on 01604 372395 for an assessment of your heating system, and no-obligation quote for a new, replacement boiler or for a boiler service of your existing one.


Call 01604 372395 Today for Boiler Installation

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