Helping UK homeowners save money on their heating

Keston Boilers – Prices, Benefits & Guarantee

keston logoKeston Heating is a British manufacturer producing high performance boilers for both the domestic and commercial markets. Established in 1928, the brand has a long history of expertise in producing reliable heating appliances. Today Keston manufacture Combi, System and Regular boilers in outputs between 30-55kW. All Keston boilers have twin flue capacity, are A rated for efficiency and recommended by the Energy Saving Trust.

Keston Product Range

  • Combi, System and Regular Boilers
  • qSpa Hot Water Cylinders

View the complete range of Keston boilers

Get FREE Boiler Quotes Now

Find professional heating engineers in your local area

Popular Combi Boilers

Combi boilers are the most popular choice for small to medium sized homes as they are compact, all-in-one units which heat your radiators and hot water on demand. They don’t require a hot water cylinder or a header tank which is ideal for homes where space is at a premium. Keston Combi boilers are available in outputs of 30 of 35kW and feature a large backlit display with simple to use controls, a twin flue of up to 25m, an easy to read pressure gauge, built-in frost protection and weather compensation.

Keston Combi C30 Keston Combi C35
Output (kW) 30 35
Dimensions (mm) 700 x 395 x 278 680 x 390 x 280
Energy Efficiency SEDBUK 2009 89.6% 89.6%
Maximum Flow Rate l/min 12.4 14.5
LPG Adjustable? No No
Standard Warranty 2 years 2 years

Popular System Boilers

If your home has several bathrooms, lots of inhabitants and a high demand for hot water, a System boiler is a great solution. While the boiler alone will heat your central heating, when combined with a hot water storage cylinder you also get a large supply of hot water for your taps, bath and shower. The Keston S30 System boiler is fully modulating delivering high energy efficiency and includes weather compensation and frost protection as standard. In addition, the 27m of twin flueing enables flexible installation.

Keston System S30
Output (kW) 30
Dimensions (mm) 700 x 395 x 278
Energy Efficiency SEDBUK 2009 89.6%
LPG Adjustable? No
Standard Warranty 2 years

Find out more about the energy efficiency rating of Keston boilers here.

Popular Regular Boilers

When replacing a boiler in an older, traditional heating system i.e. a system including a header tank in the loft and hot water cylinder, a high efficiency Regular boiler from Keston is a great choice. Available in outputs of 45 or 55kW it delivers high energy efficiency levels and low emissions.

Keston Heat 45 Keston Heat 55
Output (kW) 45 55
Dimensions (mm) 850 x 500 x 360 850 x 500 x 360
Energy Efficiency SEDBUK 2009 89.6% 89.6%
LPG Adjustable? No No
Standard Warranty 5 years 5 years

Popular Discontinued Boilers

Below you can find more information about some of Keston’s most popular discontinued models (ideal if you want to compare your current boiler to their new offerings).

Keston Celsius 25 Gas Keston Qudos 28s Gas
Keston K 55 Gas Keston K 40 Gas
Keston K 130 Gas Keston Heat 45 Gas
Keston Qudos 28h Gas Keston K 80 Gas
Keston K 170 Gas Keston Q37 Gas
Keston K 50 Gas Keston Heat 55 Gas
Keston Celsius 25P LPG Keston Combi 35 Gas
Keston C 55P LPG Keston Thermomatic RSM20FB Gas

Keston Boiler Prices

On average, a Keston boiler costs between £1,000 – £1,200 but this will vary depending on the type and size of boiler you opt for and which installer you use.

You should be sourcing quotes from at least 3 different boiler installers to ensure you’re getting a competitive price and the most value for your money. Many people save up to 50% by comparing quotes in this way.

Get FREE Boiler Quotes Now

Find professional heating engineers in your local area

Keston Guarantee

Keston offer a 2 year standard warranty on their Combi and System boilers but a 5 year warranty on their Heat (Regular) boiler if certain conditions are met. As with many boiler manufacturers, this includes having the boiler installed by a Keston accredited engineer and having it serviced annually by a Gas Safe engineer with Keston training.

Why Choose Keston Boilers?

With twin flue capacity, Keston boilers offer simple and flexible installation and a range of boilers to suit several types of home and commercial installations. Your new Keston boiler would be supported by at least a 2 year warranty and a dedicated national service team which is available 364 days a year.

Post navigation


Johnson & Starley specialises in heating and ventilation solutions for both domestic and...

Post navigation


Main has been manufacturing gas boilers and other domestic heating solutions for over 75...

British Gas Boiler Offer

0% APR for 3 Years on a New Boiler from British Gas

FREE Boiler Quotes

Get 3 FREE boiler quotes from local trustworthy heating engineers now

Warmzilla New Boiler Offer

Get a fixed price quote on your new boiler now!


British Gas Boiler Offer