Buying A New Boiler
Choosing a new boiler means balancing the type, size, fuel and efficiency that suit your home. This guide walks through the key decisions — from combi versus conventional to the makes we fit and what installation actually costs — so you can invest with confidence.
Choosing the Right Boiler Type
There are three main types of boiler. Combination (combi) boilers provide hot water whenever you turn on the hot tap and work best for small to medium homes with a maximum of two bathrooms. Conventional boilers connect to both hot and cold-water tanks, making them suitable for larger homes with two or more bathrooms. System boilers supply heating direct to your radiators using built-in pumps and expansion vessels, and need good water pressure to perform well.
Getting the Size Right
Domestic gas boilers range from 15 kilowatts (kW) to 42kW. Bigger is not better — an over-large boiler will waste energy and push up your energy bills. A qualified engineer should assess your property to recommend the correct output for your heating and hot-water demand.
Fuel Options
Most UK homes run gas-fired boilers, but alternatives include oil, liquid petroleum gas (LPG), or a stove burning wood or biomass. With all new homes built from 2025 set to be heated by low-carbon alternatives, it is worth considering renewable options such as solar thermal panels and ground or air source heat pumps.
Energy Efficiency Standards
All modern gas boilers are energy efficient, with a minimum Energy-related Products (ErP) efficiency rating of 92% required by law. New installations must also be fitted with time and temperature controls to help you manage your heating and keep running costs down.
Makes and Models We Fit
Liverpool Heating works with trusted manufacturers including Worcester Bosch, Vaillant, Baxi, Glow-Worm and Ideal boilers, so we can match a reliable unit to your home and budget.
What It Costs
Boiler units alone typically cost between £800 and £2,500. Full installations range from £2,000 – £2,850 for a straightforward combi-to-combi replacement, up to £2,300 – £3,200 where the boiler is being relocated, and £3,000 – £5,000 for a back-boiler-to-combi conversion.
