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Keston Combi 30 boiler

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Plumbproud rating

54.59%

Keston Combi 30 Combi Gas boiler

This Keston Combi 30 Combi boiler scores 54.59% on our PlumbProud boiler quality benchmark tests. To determine our rating, we consider many factors, such as the cost of installation, manufacturer guarantees, energy efficiency, and likely running costs.

This Keston Combi 30 Combi boiler will cost approximately £2,300 supplied and fully installed through PlumbProud assuming that there are no unexpected complications during the fitting.

Get a better understanding of installation costs for the Keston Combi 30 by entering your postcode in the box supplied on this page. You can also call our professional team with any boiler-related queries on 01604 343053. Alternatively, please click here to email us.


Installed price around

£2,300

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Keston Combi 30 Combi Gas boiler frequently asked questions

Which category of boiler does the Keston Combi 30 fit into?

Keston’s Combi 30 is one you might consider if you’re looking for a combi boiler for your house or flat.

Traditional boilers have one or two tanks - one holds hot water to keep it warm and the other water for later heating. Because UK residential property is among some of the smallest in the world, manufacturers introduced combi boilers and the heat pumps that go in them in the 1970s to reduce the amount of space boilers needed to take up.

The hot water needed for your radiators and taps is available on demand when you have a combi boiler. Combi boilers use technology located within the boiler to heat cold water, which it draws from the mains, and to distribute hot water where it's needed around your home.

A combi boiler, however, has the disadvantage of a maximum capacity for the amount of water it can heat. The result is that if someone uses the shower while another uses a hot water tap simultaneously, the amount of water reaching each point falls, causing water pressure to drop.

Is the Keston Combi 30 combi boiler the right choice for my house or apartment?

You should make sure that the boiler you install in your property is the right "size". And size doesn't mean its physical dimensions, size means how much power it has - the "output".

Your boiler should be able to cope with peak hot water demand in your property and not just your average hot water usage. The output rate of a boiler is measured in kilowatts and tells you how much power a boiler can use to provide hot water to your taps, showers and radiators.

If the output of your boiler is too low, there will often be times when your water isn't as hot as you want. But if your boiler output is too high, it will be more costly to run (often unnecessarily).

The output of the Keston Combi 30 combi boiler is 30 kW kilowatts. Which types of property would this be appropriate for?

Most experienced Gas Safe boiler installers would suggest that the Keston Combi 30 combi boiler would be a suitable choice for installation in medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

You also need to choose a combi boiler with the right flow rate for where you live.

A combi boiler's flow rate is the maximum volume of water (measured in litres per minute) that it can heat and distribute to your radiators, taps and showers at the same time. This Keston Combi 30 Combi boiler's flow rate is 12 L/m.

However, combi boilers like the Keston Combi 30 draw water directly from the mains and heat it instantly.

If your mains pressure is 12 litres per minute, your boiler can only heat and distribute hot water at a rate of 12 litres per minute even if it has a higher flow rate.

Combi boilers also struggle when multiple people in your home want to use hot water at the same time - for example, someone running the hot water tap in the kitchen and two people wanting to shower in separate bathrooms.

When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


What dimensions does a Keston Combi 30 have?

The size of the Keston Combi 30 boiler is 700 mm tall, 395 mm wide, and 278 mm deep.

Is the Keston Combi 30 non-condensing or condensing?

Is the Keston Combi 30 combi boiler good for the environment?

With more and more of us concerned about environmental issues and climate change, how we heat our homes has become an important issue to many homeowners.

The heating of our homes accounts for 14% of the UK's greenhouse gas emissions. Especially in the big cities, gas boilers are responsible for dangerous levels of nitrogen dioxide emissions.

Would installing a Keston Combi 30 combi boiler in your home help combat climate change? What do the figures suggest?

In the UK, by law, all boilers manufactured since April 2018 must have a SEDBUK “A” rating and operate to a minimum level of 92% energy efficiency. Prior to this, the minimum was 88% – 88/89% would score a "B" and 90% or more an "A" on the SEDBUK scale.

The energy efficiency rating measures the amount of energy a boiler consumes when it's in use and how much it loses on non-core operations.

Following testing, the Keston Combi 30 was given an efficiency rating of 89.6% and a SEDBUK grading of "TBC".

All products that consume energy throughout their lifespan must comply with the Energy Related Products (ERP) Directive.

Companies are legally obliged to reduce harmful gas emissions at all stages of a product's life cycle, from initial manufacturing right through to final disposal as well as when the product is in actual use.

The Keston Combi 30 scores "A" for heat and "A" for water.

Will I be covered if the Keston Combi 30 combi breaks down?

The Keston Combi 30 boiler comes with a parts and labour warranty of 5 years.


Keston Combi 30 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Efficiency rating89.6%
P/L Warranty5 Years
Output in kW30 kW
Height700 mm
Width395 mm
Depth278 mm
MountingWall
Flow rate12 L/m
ERP HeatA
ERP WaterA

The top 10 rated Gas Combi boilers

Using the Plumbproud scoring system, the current 10 ten Gas Combi boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%

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Keston Combi 30 boiler

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Keston Combi 30 Combi Gas boiler

  1. Home
  2. Keston Combi 30
Plumbproud rating for this boiler
54.59%

We scored this Keston Combi 30 Combi boiler at 54.59% on our internal benchmarking system. To determine a score, we take into consideration a number of different factors including the boiler's energy efficiency, installed price, likely running costs, and the length of the manufacturer's warranty.

We anticipate the supply and installation cost for this model of boiler will be around £2,300 on a standard fit.

For a free quote on the Keston Combi 30 boiler and to get professional advice and guidance on whether it is the right choice for your home, please enter your postcode in the quote boxes on this page, click here to email us, or call us on 01604 343053.


Installed price guideline
£2,300

Get your free quote

Keston Combi 30 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Efficiency rating89.6%
P/L Warranty5 Years
Output in kW30 kW
Height700 mm
Width395 mm
Depth278 mm
MountingWall
Flow rate12 L/m
ERP HeatA
ERP WaterA

Keston Combi 30 Combi Gas boiler frequently asked questions

Is this Keston Combi 30 boiler a combi, system or regular boiler?

The Keston Combi 30 boiler could be suitable for your house or flat if you are looking for a new combi boiler.

Combination or combi boilers are highly efficient and save a lot of space in your home. Combi boilers heat water directly from the mains when you turn on a tap and, as a result, you don’t need a hot water storage cylinder or a cold water tank in the roof space.

These boilers are, therefore, suitable for smaller homes and especially those without a loft. They are also cost-effective as the water is heated instantly and distributed on demand rather than being stored. Combi boilers are the most popular type of boilers in the UK and replacing an older boiler with a new combi boiler will reduce your gas bills significantly.

However, there are downsides to this type of boiler. If you take a shower while someone else is using a tap, less water will reach each point of usage at lower rates of pressure and temperatures as combi boilers can only heat a certain volume of water at any given time.

Is a Keston Combi 30 combi boiler right for my house or apartment?

Whether this Keston Combi 30 Combi boiler is right for where you live depends on its size or "output" level. Size does not mean its physical dimensions, however - it means how powerful it is.

Measured in kilowatts, a boiler's output level is an indication of the amount of power it has available to it to heat the water coming from your taps and for warming your radiators. The greater the output level, the more water it can heat.

If you choose a boiler whose output level is too low, you'll often find that the water is not as hot as you want it to be. If you choose a boiler whose level is too high, you'll be paying higher gas bills than you need to for years to come.

The output of the Keston Combi 30 combi is 30 kW, so which types of property is this Keston Combi 30 Combi boiler appropriate for?

An experienced Gas Safe boiler installer would recommend that, at this level of output, the most suitable type of property for this Keston Combi 30 Combi boiler would be medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

Flow rates are important when choosing a combi boiler as well as output rates.

A combi boiler's flow rate (measured in litres per minute) describes how much water it can instantly heat then distribute to the taps and radiators in your home - you will need to factor this into your decision on a new combi boiler. This Keston Combi 30 Combi boiler's flow rate is 12 L/m.

If you have a lot of radiators and bathrooms in your home and there's lots of demand within your household for hot water at the same time (like morning or evening showers and baths), you'll need a boiler with a high flow rate.

However, it's not quite that simple. If your local mains water pressure is low, you're not going to gain any benefit from choosing a combi boiler with a high flow rate because that higher flow rate doesn't mean it can draw more water from the mains pipes.
When our engineer comes out to quote you, they may recommend that you choose a heat only boiler or system boiler instead if your family's demand for hot water is higher than normal.


What size is the Keston Combi 30 boiler?

Keston’s Combi 30 is 700 mm tall, 395 mm wide, and 278 mm deep.

Is the Keston Combi 30 a condensing or non-condensing boiler?

Is the Keston Combi 30 combi a good choice for the environment?

How we heat our homes and the effect that has on climate change has become important to many homeowners worried about the environment.

In Britain's bigger cities, gas boilers, in particular, are responsible for dangerous levels of nitrogen dioxide emissions. Overall, 14% of all of the UK’s greenhouse gas production comes from heating our homes.

Will installing a Keston Combi 30 combi be a positive contribution to the environment? Let's see what the experts say.

Boilers manufactured or supplied to UK domestic properties must achieve a legal minimum energy efficiency rating of 92% (equivalent to a good "A" grade using the SEDBUK scale). Prior to this, the minimum was 88% (88% and 89% are a "B" SEDBUK grade and anything 90% or above is an "A" grade).

The energy efficiency rating of a boiler refers to the amount of energy it uses to perform its everyday functions as well as the amount of energy it wastes.

The Keston Combi 30 has been given a rating of 89.6% for energy efficiency, equivalent to a SEDBUK "TBC" rating.

Energy-efficient boilers help the environment as they require less fuel and emit fewer harmful gases. In 2015, the EU introduced the Energy Related Products Directive (ERP), the aim of which was to ensure that all manufacturers, including boiler manufacturers, developed more efficient products and processes.

The legislation aims to conserve energy at all life cycle stages from initial production to actual use by the customer, through to the point of disposal.

The Keston Combi 30 has been given an ERP rating of "A" for heat and "A" for water.

What is the length of the warranty on the Keston Combi 30?

Keston offers a parts and labour warranty of 5 years on the Keston Combi 30.


The top 10 rated Gas Combi boilers

Using the Plumbproud scoring system, the current 10 ten Gas Combi boilers assessed using a number of important variables are as follows:

1Vaillant ecoTEC Plus 82593.35%
2Vaillant ecoTEC Plus 83292.98%
3Worcester Bosch Greenstar 2000 25kW92.89%
4Viessmann Vitodens 050-W 29kW92.66%
5Vaillant ecoTEC Plus 83592.60%
6Worcester Bosch Greenstar CDi Compact 2892.57%
7Vaillant ecoFIT Pure 82592.39%
8Vaillant ecoTEC Plus 83892.16%
9Vaillant ecoTEC Exclusive IQ 83591.90%
10Vaillant ecoTEC Pro 2491.77%
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