Choosing the Right New Boiler for Your Home

Replacing a boiler is one of the bigger decisions a homeowner makes, and the right choice is rarely about the most expensive unit. It is about matching the boiler type and output to how your household actually uses heat and hot water. Get that right and you pay less to run a system that lasts; get it wrong and you live with weak showers, cold rooms or a unit working harder than it should. This guide explains how we help customers across Hampshire, Surrey and Sussex make that call.

The Three Boiler Types

Almost every domestic installation comes down to one of three boiler types, and the differences matter.

• Combi boilers: the right choice for most homes with a single bathroom. They heat your home and provide hot water on demand with no separate cylinder or loft tank, which saves space and reduces maintenance.
• System boilers: better suited to larger homes running several bathrooms. They work with a hot water cylinder so multiple outlets can draw hot water at the same time without the pressure dropping away.
• Regular boilers: usually retained in older homes that already have a loft tank and cylinder arrangement worth keeping. They suit properties where replacing the wider system would be unnecessarily disruptive.

There is no single best answer. The right type depends on your property, the number of bathrooms and how much simultaneous hot water you need, and we talk every customer through the trade-offs before anything is ordered.

Getting the Size Right

Output, measured in kilowatts, is just as important as type. An undersized boiler struggles to keep up; an oversized one cycles inefficiently and costs more to run. Correct sizing comes down to the number of bathrooms, household size and overall water demand, which is exactly why a proper survey beats an over-the-phone guess. We calculate the right output for your home rather than fitting whatever is on the van.

What It Really Costs

A new boiler installation typically runs from £3,000 to £6,000 or more. The spread is wide because the boiler itself is only part of the picture: the manufacturer you choose, the size and complexity of the system and any additional work all move the figure.

• Likely extras: new pipework, a flue upgrade, a chemical system flush or upgraded thermostats and controls.
• Why we survey first: a proper survey means the written quote reflects the real job, so the price you are quoted is the price you pay.

Installation Day

A straightforward swap is usually a one-day job. Where pipework, the boiler location or the system type needs changing, expect two to three days. You will typically be without heating and hot water for most of one day while the old system is removed and the new one fitted, so it is worth planning the work outside the coldest weeks if you can. Every installation is carried out by Gas Safe registered engineers and finished with full commissioning and safety testing.

Aftercare and Warranty

Once the boiler is in, looking after it is simple: keep an eye on the pressure, bleed radiators if a room is slow to warm, and book an annual service. That yearly service is not just good practice; most manufacturer warranties require it to stay valid. We register the warranty for you and remain on hand for servicing and support for the life of the boiler.

Frequently Asked Questions