GET A COMPETITIVE QUOTE

Please enter your postcode below to get a free, no obligation, personalised quotation from PlumbProud

Keston Combi 35 boiler

  1. Home
  2. Keston Combi 35
Plumbproud rating

54.10%

Keston Combi 35 Combi Gas boiler

Considering lots of different factors such as price installed, manufacturer guarantees, energy efficiency, and the likely running cost, we’ve given this Keston Combi 35 Combi boiler a rating of 54.10% using our PlumbProud quality scoring system.

This Keston Combi 35 Combi boiler will cost around £2,400 fitted through PlumbProud where there are no complications during the installation.

Enter your postcode in the box provided and receive a free quote for the Keston Combi 35 boiler for your home. We are also happy to answer any questions you might have about any of our boilers. You can do this by emailing the team or calling us today on 01604 343053.


Installed price around

£2,400

GET A COMPETITIVE BOILER QUOTE

Please enter your postcode below to get a personalised quotation for the perfect boiler for your home

Keston Combi 35 Combi Gas boiler frequently asked questions

Keston Combi 35 - a system boiler, regular boiler or combi boiler?

If you are searching for a combi boiler for your house or flat, the Keston Combi 35 is certainly one to consider.

Traditional boilers have one or more large tanks in which they store either heated water or water to be heated later. Manufacturers originally introduced combi boilers to the market in the 1970s to enable homeowners to save space - UK residential properties are among the smallest in the Western world.

Combi boilers don't need these tanks because they draw water directly from the mains and instantly heat it on demand thanks to the technology inside the boiler. Combi boilers then distribute this hot water to your home’s taps and radiators when needed.

The most significant disadvantage of combi boilers is that they are not ideal in larger homes where multiple people might want hot water at the same time – for example, if someone is having a shower while another wants to wash dishes in the kitchen. This is because combi boilers have a maximum volume of water that they can heat. When two people want hot water at the same time, the water temperature, pressure and volume delivered to both points drop.

Should I install a Keston Combi 35 combi boiler in my house or apartment?

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 35 combi is 35 kW kilowatts, so which types of property would this be most suitable for?

A heating engineer would recommend that this Keston Combi 35 Combi boiler would provide adequate heating and hot water for larger properties including detached homes with up to 15 or more radiators and two or more bathrooms.

With combi boilers, you need to consider the flow rate as well as the output rate. The flow rate (shown in litres per minute) measures how much water your boiler can draw from the mains which it then instantly heats and distributes to your taps and radiators.

However, a high flow rate is of little to no value if your local water pressure is low. If your local mains water pressure is 10l/m and your flow rate is 12l/m, your boiler will only be able to process 10l/m.

If you live in an area with high water pressure but your household has multiple bathrooms and/or radiators and many members of your household want to use hot water at the same time (like morning or evening baths or showers), it's unlikely that you'll be able to find a combi with a high enough flow rate.

As an indication, a power shower needs about 10 litres of water per minute, whereas the flow rate of this Keston Combi 35 Combi boiler is 15 L/ml/m.

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.


Dimensions of the Keston Combi 35 boiler

The dimensions of the Keston Combi 35 are 700 mm [H] x 395 mm [W] x 278 mm [D].

Combi 35 – non-condensing or condensing?

How does the Keston Combi 35 combi rate environmentally?

Environmentally-friendly heating has become an important issue for homeowners concerned about the accelerating pace of climate change.

Central heating systems are responsible for 14% of greenhouse gas emissions in the UK. You may also be aware that the gas boilers we use emit dangerous nitrogen dioxide in large volumes in the bigger British cities.

Is the Keston Combi 35 combi boiler an environmentally friendly choice for your home? Here’s what the figures say.

All boilers manufactured and supplied in the UK are assigned two energy efficiency ratings. By law, they must achieve a SEDBUK "A" rating subject to a minimum efficiency level of 92%. Prior to that, the minimum was 88% (88% and 89% are equivalent to a SEDBUK "B" grade and 90% and above an "A" grade).

The ratings awarded to the Keston Combi 35 are 89.6% with a SEDBUK rating of "TBC".

The Energy Related Products Directive intends to encourage all manufacturers to reduce the harmful gas emissions associated with the products they make, from the manufacturing stage to final disposal, including when they are in active use.

The Keston Combi 35 has an ERP rating of "A" for heat and "A" for hot water.

If the Keston Combi 35 combi boiler breaks down, am I covered?

The parts and labour warranty on the Keston Combi 35 covers all repair-related costs for 5 years while the heat exchange warranty covers you for [Heat Exchange Warranty] years.


Keston Combi 35 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Efficiency rating89.6%
P/L Warranty5 Years
Output in kW35 kW
Height700 mm
Width395 mm
Depth278 mm
MountingWall
Flow rate15 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%

Combi boilers

Choose from the UK’s biggest range of combis

Heat only boilers

The ideal boiler perfect for the largest homes

System boilers

Ideal for 3+ bedroom, 2+ bathroom homes

Boiler quote

Free, no obligation quote from our engineer

Keston Combi 35 boiler

We will not be beaten on price -
ask us about our PRICE GUARANTEE!

Keston Combi 35 Combi Gas boiler

  1. Home
  2. Keston Combi 35
Plumbproud rating for this boiler
54.10%

We have awarded this Keston Combi 35 Combi boiler a rating of 54.10% in our boiler quality benchmark tests. To determine a score for each boiler, we factor in several different points of comparison including energy efficiency, manufacturer guarantees, estimated running costs, price and more.

On straightforward installations, we would expect to charge you £2,400 for this Keston Combi 35 Combi boiler fully installed.

For a free, no-obligation quotation on this Keston Combi 35 Combi boiler or for our professional advice on whether the Keston Combi 35 is suitable for your property, please call 01604 343053, click here to email our team or enter your postcode into the quotation box on this page.


Installed price guideline
£2,400

Get your free quote

Keston Combi 35 Gas Combi boiler specifications

Powered by GasGas
LocationExternal
Efficiency rating89.6%
P/L Warranty5 Years
Output in kW35 kW
Height700 mm
Width395 mm
Depth278 mm
MountingWall
Flow rate15 L/m
ERP HeatA
ERP WaterA

Keston Combi 35 Combi Gas boiler frequently asked questions

Keston Combi 35 - a regular boiler, combi boiler or system boiler?

You might want to consider the Keston Combi 35 for your house or flat if you are looking for a combi boiler.

Combi boilers provide hot water or heating for your home on demand. You just need to turn the tap to get hot water or switch on the radiator and you’ll feel your home warm up within minutes.

In contrast, traditional boilers required either one or two large storage tanks to work - one to heat and keep water warm and the other to hold cold water for later heating. If the immersion tank was empty, it wasn’t uncommon to wait up to an hour for enough hot water to fill a bath, for example.

Combi boilers draw cold water from the mains and then heat it instantly whenever it's needed, all from one small unit.

The one disadvantage to combi boilers is that, if more than one point is in use at any one time (for example, if someone is taking a shower and another person turns on a hot water tap elsewhere in the property), water pressure, temperature and volume drop to both points.

Is the Keston Combi 35 combi boiler a suitable option for my house or flat?

Whether this Keston Combi 35 Combi boiler is right for where you live depends on its size or what its "output" level is. Size does not mean its physical dimensions, however - it means how powerful it is.

The output of a boiler is measured in kilowatts and indicates how much energy it can use to heat the water needed for your radiators, taps and showers. The greater the output, the more water it can heat.

A boiler whose output is too high will give you hot water and warm radiators but also higher gas bills, whereas a boiler whose output is too low will result in cheaper gas bills but the water might not always be as hot as you want it to be.

The output of the Keston Combi 35 combi is 35 kW, so which types of property would this model be appropriate for?

An experienced Gas Safe engineer would say that this Keston Combi 35 Combi boiler's level of output makes it suitable for installing in larger properties including detached homes with 15 or more radiators and two or more bathrooms.

With combi boilers, you need to consider the flow rate as well as the output rate. The flow rate (shown in litres per minute) measures how much water your boiler can draw from the mains which it then instantly heats and distributes to your taps and radiators.

However, a high flow rate is of little to no value if your local water pressure is low. If your local mains water pressure is 10l/m and your flow rate is 12l/m, your boiler will only be able to process 10l/m.

If you live in an area with high water pressure but your household has multiple bathrooms and/or radiators and many members of your household want to use hot water at the same time (like morning or evening baths or showers), it's unlikely that you'll be able to find a combi with a high enough flow rate.

As an indication, a power shower needs about 10 litres of water per minute, whereas the flow rate of this Keston Combi 35 Combi boiler is 15 L/ml/m.

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.


Keston Combi 35 - size in millimetres

The Keston Combi 35 stands at 700 mm tall, 395 mm wide and 278 mm deep.

Keston Combi 35 – non-condensing or condensing?

Is the Keston Combi 35 combi a good choice for the environment?

How we heat our homes and the damage this does to the environment has become a pressing concern for many homeowners worried about the effects and impact of climate change.

Central heating accounts for 14% of greenhouse gas emissions in the UK. In larger British cities, gas boilers emit dangerous levels of nitrogen dioxide into the atmosphere.

Would installing the Keston Combi 35 combi in your home be an environmentally friendly decision? Let's look closely at the figures.

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 35 was awarded an efficiency rating of 89.6%, equivalent to a SEDBUK grade of "TBC".

The Energy Related Products Directive grades products according to the energy they consume and the harmful gas emissions they create, from manufacturing right through to final disposal, including how they're used by customers between these two points.

The Keston Combi 35 is rated "A" for heat and "A" for water.

How many years does the warranty period cover on a Keston Combi 35 boiler?

The Keston Combi 35 is covered by a parts and labour warranty of 5 years following installation.


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%
Menu