Start with how your home uses heat and hot water
A boiler should be selected for the property and the people using it, rather than by choosing the largest output or the most familiar model. The number of bathrooms, how many taps may run together, the number of radiators and your current hot-water arrangement all help narrow the options. In the online calculator, answers about bedrooms, radiators and the existing boiler give an initial direction. They are a starting point for a conversation, not a replacement for checking the installation.
Your existing system is often the clearest clue. A combi boiler heats tap water when you need it and usually works without a separate hot-water cylinder. A system boiler heats a stored cylinder, while a heat-only or regular boiler works with a cylinder and, in many homes, tanks in the loft. Changing system type can involve more work than exchanging a similar boiler, so tell us if you are considering a conversion.
Choose the right boiler type and output
1st Climate offers boilers from Ideal, Worcester Bosch, Vaillant and Baxi. The range includes combi options as well as system and heat-only models. We currently recommend Ideal models first in the combi recommendations; the calculator presents alternatives that match the answers you have given. Heat-only boiler choices are from Baxi. The suitable options depend on the type of system and the required output, so a particular brand or model should not be treated as a universal fit.
Output is measured in kilowatts, but a higher number is not automatically better. A correctly sized boiler needs to meet your heating demand and, for a combi, provide enough hot water for your usual use. The guide calculator uses the details you enter to suggest a size range. An engineer should check the home, pipework, controls, flue route and hot-water demand before the final model is agreed.
What can change an installation quote?
A straight swap in the same position is different from a conversion, a relocation or a flue route through a roof. Boiler type and output also affect the equipment price. Your guide price reflects the answers in the calculator, including choices such as a roof flue or square flue where those questions apply. If a detail is uncertain, choose the closest answer; the final scope can be checked before work is booked.
Other property-specific work can affect a fixed quote. The engineer may need to check access, the condition and route of the pipework, drainage for the boiler condensate, the controls and whether existing components are suitable for the replacement. We will explain any change before you decide. The homepage shows boiler installation from £2,030; your own guide price depends on the boiler and installation details you select.
What to expect on installation day
For a like-for-like replacement, plan for the heating and hot water to be unavailable while the old boiler is removed and the new one is connected. A straightforward swap is commonly planned as a one-day job; a conversion, relocation or extra work can take longer. We will confirm the expected schedule for your particular installation rather than assume every home follows the same timetable.
Before the visit, clear a path to the boiler, controls and any cylinder or loft equipment that needs inspection. Keep pets and children away from the work area. The engineer will need to test the completed installation and explain the controls. Gas work on a gas boiler must be carried out by an appropriately Gas Safe registered engineer. Ask for the relevant installation paperwork and retain the boiler and warranty documents.
Aftercare, warranty and arranging a visit
Boiler warranties depend on the exact product and the manufacturer's conditions. Selected installations may have warranties of up to 12 years; terms apply and the precise duration should be checked against the boiler offered. Keep the installation record and ask what servicing or registration steps are needed to protect the manufacturer's cover. A warranty is not a promise that every part or visit is covered in every circumstance.
Next-day installation may be available for some homes, but availability and the work required need to be checked. Monthly payment options may be available; ask 1st Climate for the current terms and eligibility before relying on them. If you have a like-for-like comparison, you can also ask about the price match guarantee. To get started, use the online quote journey without a postcode; your postcode and contact details are requested only at the end. For ongoing care, see our boiler servicing guide.
Common questions
How much does a new boiler installation cost?
The homepage currently shows boiler installations from £2,030. Your guide price depends on the model, output, boiler type, flue and work required. The final quote is confirmed after the property details are checked.
How long does a boiler replacement take?
A straightforward like-for-like swap is commonly planned for one day. A conversion, relocation or additional work can take longer, so confirm the expected schedule for your home.
Can I get next-day installation?
Ask about next-day availability. It depends on the installation details, equipment and available appointment slots.
What boiler brands do you install?
1st Climate offers Ideal, Worcester Bosch, Vaillant and Baxi boilers. The options shown depend on your existing system and the calculator answers.