Keston Boilers

Name

Keston Boilers

Legal name

Keston Boilers Ltd

Website

https://keston.co.uk

Company type

Private

Founded year

2013

Operating status

Operating

Headcount range

501–1,000 employees

Ownership category

akta.pro rank

Product category

Domestic and Commercial Heating Boilers

NAICS

Power Boiler and Heat Exchanger Manufacturing (33241)

SIC

Heating Equip, Except Elec & Warm Air; & Plumbing Fixtures (3430)

akta.pro primary industry

Heat Transfer Equipment (Heat Exchangers, Boilers, Condensers) (IMAHAEAC)

Keywords

• Condensing boilers
• Combi boilers
• System boilers
• Commercial heating
• Gas boiler manufacturing

Headquarters

HQ city

Bromley

HQ country

United Kingdom

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel

Revenue model

1. Boiler Sales: Sale of condensing twin flue boilers including Combi (C30/C35), System (S30), and Heat (45/55) models for domestic and light commercial applications.
2. Parts and Accessories: Sales of boiler parts, controls, and accessories including system filters (22mm, 28mm), RF thermostats, plate heat exchange packages, high rise flue kits, and mechanical timers.
3. Extended Warranty: Standard warranties extended from 5 to 7 years when installed with Keston system filter and registered within 30 days of installation.
4. Commissioning Services: Free commissioning service for Heat boilers when installed with Keston 28mm System Filter, provided by Keston engineers to activate warranty.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels5 records

Core offering

Keston Boilers designs, manufactures, and distributes twin flue condensing boilers for domestic and commercial applications in the UK. Its product range includes combi boilers (Combi 2 C30 and C35), system boilers (System 2 S30), and larger commercial units (Heat 2 45 and 55), along with associated accessories such as system filters, RF thermostats, plate heat exchange packages, high rise flue kits, and cascade packages. The company sells exclusively through a network of independent Gas Safe registered installers rather than direct to end users.

Product overview

Keston Boilers offers a range of domestic and light commercial twin flue boilers and accessories. The product portfolio includes Combi 2 (C30 & C35) combination boilers providing heat and hot water without separate tanks, System 2 (S30) for central heating with hot water cylinders, and Heat 2 (45 & 55) for larger homes and commercial settings. The range is complemented by accessories including magnetic system filters (22mm and 28mm), RF programmable thermostats, plate heat exchange packages, and high-rise flue kits. All products feature the proprietary twin flue technology allowing flexible installation up to 27m from flue outlets.

Differentiator

Problem solved

Functional benefit

Products and services

• Keston Combi 2 C30 A 30 kW twin flue condensing combination boiler for domestic hot water and central heating, designed for UK homes and installed by Gas Safe registered heating engineers.
• Keston Combi 2 C35 A 35 kW twin flue condensing combination boiler for larger domestic properties requiring higher domestic hot water and central heating output.
• Keston System 2 S30 A 30 kW twin flue condensing system boiler for homes that use a separate hot water cylinder, suited to properties with higher hot water demand.
• Keston Heat 2 45 A 45 kW twin flue condensing boiler for light commercial and larger domestic installations such as small commercial premises, offices and larger residential properties.
• Keston Heat 2 55 A 55 kW twin flue condensing boiler for light commercial installations with greater heating load requirements.
• Keston Boiler Accessories A suite of accessories including system filters, RF thermostats, plate heat exchange packages, high rise flue kits, and Heat 2 cascade packages for use with Keston boiler installations.

Quantifiable outcome

• Twin flue capability up to 27m for Combi and System boilers
• +4 more outcomes

Segments3 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability2 records

Feature5 records

Partnerships

Two partnerships are on record, tiered minor and core.

• Macmillan Cancer SupportminorOthersKeston is an official partner of Macmillan Cancer Support, with the partnership logo displayed on the website footer indicating corporate social responsibility involvement.
• Atlantic GroupcoreStrategic or Co-development PartnerKeston is part of the Atlantic Group, a European heating and hot water specialist with multiple heating brands including Ideal Heating, ACV, Hamworthy Heating, and Triangle Tube. The group focuses on multi-energy heating solutions across France and international markets.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Direct peers

• Ideal Heating: Sister brand within Atlantic Group, manufacturing domestic and commercial boilers in the UK with overlapping product categories (combi, system, heat only). Highly comparable on technology, channel model, and parent backing; primary intra-group competitor.
• Hamworthy Heating: Sister brand within Atlantic Group focused on commercial boilers and hot water for collective housing and service buildings. Comparable on parent backing, commercial heating focus, and parts/distribution infrastructure in the UK.
• Worcester Bosch: UK market-leading gas boiler manufacturer with comparable combi, system, and commercial ranges sold through installer channels. Most direct competitor to Keston in domestic and light commercial condensing boilers, competing on installer relationships, regulatory compliance, and brand trust.
• Vaillant: Major UK boiler manufacturer offering ecoTEC combi and system ranges and commercial boilers. Comparable product positioning, installer-led distribution, and focus on condensing efficiency and regulatory compliance.
• Viessmann: German heating manufacturer with strong UK presence in condensing boilers, commercial heating, and increasingly heat pumps. Comparable on commercial boiler capability, regulatory compliance, and installer channel model.
• Glow-worm: UK-focused boiler brand owned by Vaillant Group, offering combi and system boilers through installer channels. Similar positioning on domestic condensing boilers and installer-led go-to-market.
• Potterton: Established UK boiler brand offering domestic and commercial condensing ranges through installer channels. Comparable product range and distribution approach, competing for installer loyalty schemes.
• Baxi: One of the largest UK boiler brands, part of BDR Thermea Group, offering combi, system, and regular boilers through installer networks. Directly comparable product range and channel strategy to Keston.

Emerging players

• Alpha Boilers: UK-focused boiler manufacturer offering combi and system models at competitive price points through installer networks. Comparable niche positioning to Keston in the mid-market condensing boiler segment.
• Intergas: Dutch manufacturer of high-efficiency combi boilers with growing UK presence through installer channels. Comparable focus on condensing efficiency and compact installation, though a smaller UK brand share than the major incumbents.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/keston_boilers
• Facebookfacebook.com/kestonboilers
• LinkedInlinkedin.com/company/keston-boilers

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Keston Boilers