Our Blog

Determine Boiler Installation Cost With Our New Instant Quote Tool

Posted on November 22nd 2017
How to Determine Boiler Installation Cost

How to Determine Boiler Installation Cost

Afraid a new boiler will evaporate your finances?

Nearly a third of homeowners (33 percent) dread a boiler breakdown over the winter months. It’s not just the cost – many don’t understand the technical ins and outs of a boiler replacement.

That’s why we designed our free quote tool to help. Below, we’ll take a look at how you can use it to figure out your boiler installation cost.

Type of Home

The first thing our quote tool does is ask what kind of home you have.

Your property type will have two major effects on your new boiler costs. First, there’s the size of your home. Second, there are shared walls, floors, and ceilings to consider.

We talk about boilers in terms of ‘size’, which is another way of saying ‘output’. Boiler output is measured in kW. It describes the amount of heating your boiler can kick out.

But bigger isn’t always better. Your boiler should be large enough to heat your home. Any larger, and you’re just wasting energy. Flats and bungalows benefit from their small size, while houses may require a little extra.

But terraced and semi-terraced houses, along with flats, have their own advantages. Insulated party walls between homes can reduce the risk of heat loss, resulting in lower heating needs. Flats may be insulated by other units in the block above, below, and to the sides.

That’s not a definite, however. RdSAP guidelines were revised in 2014 when a research program found that uninsulated party walls can cause huge amounts of heat loss.

Our tool looks at your property type as an initial guide for your costs.

Number of Bedrooms

The next question our quote tool will ask is the number of bedrooms you have.

The number of bedrooms gives an indication of the size of the property. We can draw on our experience to calculate for the average 3-bed house, for instance.

It doesn’t stop there, though. Bedrooms also suggest any infrastructure which might need revising.

Bedrooms form one of the most important “habitable rooms” in a property. Habitable rooms are those where occupants expect a reasonable level of comfort over time, so it includes most rooms except hallways and bathrooms.

Habitable rooms should all have a radiator with an attached thermostat. A new boiler might mean new pipes and radiator work, so we factor that into our quoted boiler installation cost.


Having more than one bathroom could increase your boiler installation cost.

Our free quote tool factors the number of bathrooms into the price. Having more bathrooms in your home places higher demands on your heating system. Water pressure becomes a concern for bigger properties with multiple bathrooms.

Many homes with more than one bathroom are older properties. These tend to have pipework that hasn’t been overhauled since their original build. Modern combi boilers can struggle to cope with large homes and outdated pipework.

But it’s not all bad news. Our quote tool can account for the number of bathrooms and give you a realistic idea of what to expect when you need a replacement. Knowing the cost now could save you headaches at a later date.

Water Heating

Finally, we need to know what water heating system you have.

Many homes still have separate water heating. In homes like these, boilers only exist to heat the house. Water heating is provided by a separate hot water cylinder. If you’re in a house with multiple bathrooms, there’s a good chance you still have a hot water cylinder.

Your water heating situation may also affect your boiler installation cost. The extra work required to remove a hot water cylinder and install new piping results in higher costs. But installing a combi boiler can go a long way to modernising your home, reducing your bills in the long run.

Alternatively, you can choose to keep your existing water cylinder. This might lead to lower initial costs. But if you want to upgrade your water cylinder, you’ll have to do it separately. This might be the right option for larger homes, in which case you might opt for a regular or system boiler.

When you run through our free quote tool, we’ll ask whether you want to remove your hot water cylinder and replace it. That way, we can give you an idea how much it might cost for the additional work required.

Which Boiler Do I Choose?

Boiler installation cost will always vary depending on your boiler type. We’ve briefly touched on a few, but let’s take a closer look at the heating options available to you. That way, you’ll be better informed to make the right choice for you.

Combination Boiler

A combination or “combi” boiler acts as a water along with providing central heating to your home. It works best for small properties with few bathrooms, as this ensures water pressure stays at a decent level.

If you already have a combi boiler, then swapping for an equivalent modern model is usually ideal. If you have separate water heating and live in a smaller home, you might choose to opt for a combi boiler install.

Regular Boiler

Regular boilers (as known as “heat only”) are the older, traditional type that usually accompanies a water cylinder. Regular boilers require tanks in the loft space to deliver water to the system. These boilers usually find use in older and larger homes, where maintaining water pressure in pipes is a concern.

System Boiler

System boilers use a hot water tank to deliver heating and hot water, but its major components are built into a single unit. So it doesn’t demand loft space like a regular boiler and benefits from ease of installation. System boilers are an economical solution for houses with multiple bathrooms.

Get a Quote for Your Boiler Installation Cost

Now you know how it works, you’re ready to get your boiler quote for free. Think about what options you want, then head to our quote page to get an idea of your boiler installation cost. If you still have questions, don’t hesitate to contact us – we’d love to hear from you.

Need more advice? Be sure to visit our blog!