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Keston Combi 30 boiler

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  2. Keston Combi 30
Plumbproud rating

54.59%

Keston Combi 30 Combi Gas boiler

On the PlumbProud quality scoring system, we rate this Keston Combi 30 Combi boiler at 54.59%. To determine a boiler's quality, we consider many different factors from price installed to manufacturer guarantees, energy efficiency, likely cost of running, and more.

We would anticipate that this Keston Combi 30 Combi boiler would cost you £2,300 fully installed through PlumbProud provided that the fitting is standard and with no complications.

We offer free quotes and professional advice and guidance on whether the Keston Combi 30 is a suitable choice for your home via a phone call on 01604 343053. Alternatively, please click here to email us or enter your postcode in the quote boxes on this page.


Installed price around

£2,300

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Keston Combi 30 Combi Gas boiler frequently asked questions

Keston Combi 30 - a system boiler, regular boiler or combi boiler?

Suitable for a house or a flat, the Keston Combi 30 combi boiler is worth considering if you want a combi boiler.

Traditional boilers require at least one large cylindrical tank to work, normally housed in a large landing cupboard, utility room or the attic. As the UK has some of the world's smallest residential properties, manufacturers introduced the combi boiler in the 1970s to address the issue of space while meeting homeowners' need for central heating and hot water at the same time.

Combi boilers don't need external storage tanks. Instead, they draw water directly from the mains, heat it and then distribute it on demand to the areas where it is needed.

The most important disadvantage of combi boilers is that they have a maximum capacity for the amount of water they can heat up. This means that, if one person in your household is having a shower and another person turns on a hot water tap elsewhere, then the volume, pressure and temperature of the water to both points decreases.

Is a Keston Combi 30 combi boiler suitable for my house or flat?

It's best to choose a boiler whose size or "output" is right for your property. With boilers, however, size does not mean how big a boiler is, it means how much power it has.

The output of a boiler is measured in kilowatts and tells you how much power it has available to heat the water it sends to your hot taps, showers and radiators. The greater the demand for hot water in your home, the larger the output you will need.

It is important to select a boiler with the optimal output rate. Choose one with too high an output and your gas bills will be too expensive. Choose one with too low an output and sometimes the water in your radiators and coming out of your taps will be barely lukewarm.

The output of the Keston Combi 30 combi is 30 kW kilowatts, so which types of property would this be most suitable for?

Most experienced boiler engineers would recommend that this Keston Combi 30 Combi boiler would be suitable for medium-sized homes and larger apartments with 10-15 radiators and two bathrooms.

Homeowners considering fitting a combi boiler to their home need to consider flow rates as well as output rates.

The flow rate is a measurement of the volume of water a combi can instantly heat and send to the taps and radiators around your home. The higher the likely demand for hot water in your home, the higher your combi's flow rate should be. This Keston Combi 30 Combi boiler's flow rate is 12 L/m.

Unlike heat only or system boilers, combi boilers don't store hot water in a tank for later use - instead, they draw it directly from the mains. This means that the volume of water your boiler can actually process is constrained by the flow rate of water in the mains pipe.

So, if you choose a combi boiler with a 15l/m flow rate but the flow rate in your mains pipe is 12l/m, the combi boiler's working flow rate is also 12l/m.

Combi boilers are also not always the correct choice for homes with multiple bathrooms, a high number of radiators, or where more than one family member will want to use hot water at the same time.

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.


The size of the Keston Combi 30

The Keston Combi 30 has the following dimensions - 700 mm high, 395 mm wide, and 278 mm deep.

Is the Keston Combi 30 non-condensing or condensing?

Is the Keston Combi 30 combi environmentally friendly?

Many homeowners are now worried about climate change and the damage they do to the environment from heating their homes has become a subject of increasing concern.

We generate 14% of UK greenhouse gas emissions through centrally heating our domestic properties. Gas boilers are mainly responsible for harmful nitrogen dioxide emissions in larger British cities.

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

Every boiler manufactured and supplied in the UK must have an energy efficiency rating of 92% (SEDBUK “A” rating). These minimums were made law in April 2018 - before that, the minimum energy efficiency rating was 88% (88%/89% = "B" SEDBUK grade, 90%+ = "A" SEDBUK grade).

The Keston Combi 30 was awarded an efficiency rating of 89.6% and a band rating of "TBC".

Energy efficiency ratings for boilers describe the amount of energy they use and waste when switched on and working.

The Energy Related Products (ERP) Directive is a European directive which applies to all products that consume energy over their lifetime.

It encourages companies to create products that are environmentally friendlier at all life cycle stages, including initial manufacturing and end use through to final disposal, with the aim of reducing harmful gas emissions.

The Keston Combi 30 is rated "A" for heat and "A" for water.

How many years' warranty does the Keston Combi 30 combi come with?

The Keston Combi 30 boiler offers 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%

Our PlumbProud quality scoring system considers important factors like energy efficiency, the length of a manufacturer’s guarantee, likely running costs, and installed price to determine a boiler's value for money. This model has received 54.59% from our engineers.

You should budget around £2,300 for the supply and installation of this Keston Combi 30 Combi boiler by PlumbProud.

For professional advice on whether the Keston Combi 30 is the right boiler for your home or to receive a free quotation, please call 01604 343053 to speak to our friendly team. You are also welcome to email us by clicking here or you can enter your postcode into the quotation box on this page.


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 the Keston Combi 30 a combi, system or regular boiler?

The Keston Combi 30 is a combi boiler you may wish to consider if you want this particular type of boiler for your house or flat.

Traditional boilers require at least one large cylindrical tank to work, normally housed in a large landing cupboard, utility room or the attic. As the UK has some of the world's smallest residential properties, manufacturers introduced the combi boiler in the 1970s to address the issue of space while meeting homeowners' need for central heating and hot water at the same time.

Combi boilers don't need external storage tanks. Instead, they draw water directly from the mains, heat it and then distribute it on demand to the areas where it is needed.

The most important disadvantage of combi boilers is that they have a maximum capacity for the amount of water they can heat up. This means that, if one person in your household is having a shower and another person turns on a hot water tap elsewhere, then the volume, pressure and temperature of the water to both points decreases.

Is the Keston Combi 30 combi suitable for my house or flat?

To determine that, we need to consider the size of the boiler. Size doesn't mean how big it is - it means how big its "output" is.

Boiler output is measured in kilowatts and tells you how much power a boiler can use to heat the water your taps, showers and radiators need. The higher the output, the more power it has.

When choosing a boiler, you should choose one that can cope with the peak demand for hot water in your home and not just your typical usage.

If its output is too low, sometimes your hot water will not be hot enough, but if your boiler's output is too high for your needs, your gas bills will go up and not down.

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

Most Gas Safe boiler installers would likely recommend that, at this level of output, this Keston Combi 30 Combi boiler would be a suitable choice for 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 size is the Keston Combi 30 boiler?

The Keston Combi 30 measures 700 mm tall, 395 mm wide, and 278 mm deep.

Combi 30 – non-condensing or condensing?

Is the Keston Combi 30 combi boiler environmentally friendly?

Many homeowners are now worried about climate change and the damage they do to the environment from heating their homes has become a subject of increasing concern.

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

Do the available figures suggest that installing the Keston Combi 30 combi in your property would be an environmentally friendly choice?

All new British boilers must perform to a legal minimum energy efficiency of 92% (a low to good SEDBUK "A" rating). Prior to April 2018, the target was 88% (86-90% = SEDBUK "B" and 90%+ = SEDBUK "A").

Efficiency ratings are intended to let consumers know how much energy a boiler uses in its day-to-day activities and how much energy goes to waste.

The Keston Combi 30 was awarded an efficiency rating of 89.6%, equivalent to a SEDBUK grade of "TBC".

The Energy Related Products Directive (ERP) intends to reduce the amount of energy consumed by individual products over their entire lifetime, from the initial manufacturing process to final disposal and at all points in between.

The legislation is designed to encourage manufacturers to create products that are more environmentally friendly and which result in a reduction in harmful gas emissions.

The ERP rating for the Keston Combi 30 is "A" for heat and "A" for hot water production.

Am I covered if the Keston Combi 30 combi boiler breaks down?

The Keston Combi 30 is supplied with a parts and labour warranty of 5 years.


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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