Keston 30S Condensing System Boiler – 30kW

Keston 30S System Boiler

The Keston 30S Condensing System Boiler is a compact 30kW gas-fired system boiler designed to provide efficient central heating for domestic heating systems. It combines condensing technology, fully modulating operation, weather compensation and flexible twin-flue installation options in a compact wall-mounted design.

The Keston 30S is particularly useful for new heating installations and replacement boiler projects where installation flexibility and compact dimensions are important. Keston’s current System 2 S30 model continues the 30kW system-boiler concept, with A-rated efficiency and twin-flue capability of up to 27m depending on the installation configuration.

Efficient 30kW Condensing System Boiler

With a 30kW heating output, the Keston 30S provides a practical solution for domestic central heating applications where a system boiler is preferred.

Unlike a combi boiler, a system boiler is designed to work with a separate hot water cylinder for stored domestic hot water. This makes the Keston 30S suitable for heating systems where hot water storage is required.

The current Keston System 2 S30 is rated A for seasonal space-heating efficiency and has a 30kW output.

Compact Keston 30S Design

One of the major advantages of the Keston 30S is its compact wall-mounted format.

Manufacturer specification data gives the boiler dimensions as approximately:

• Height: 700mm
• Width: 395mm
• Depth: 278mm

The compact dimensions make the boiler suitable for installations where available wall and cupboard space is restricted. However, the manufacturer specifies minimum clearances for operation and servicing, so the actual installation location must always be checked by a qualified heating professional.

Twin-Flue Installation Flexibility

The Keston 30S is designed around Keston’s twin-flue technology, giving installers additional flexibility where a conventional concentric flue arrangement may be difficult.

The current Keston System 2 S30 supports twin-flue configurations of up to 27m, subject to the permitted flue arrangement, equivalent lengths, bends and installation requirements.

This flexibility can be particularly useful in challenging installations where the boiler location and flue termination position require a more adaptable solution.

Fully Modulating Heating Operation

The Keston 30S uses fully modulating operation to adjust boiler output in response to heating demand.

This helps the heating system operate more efficiently rather than simply running continuously at maximum output. The current System 2 S30 specification also includes weather compensation supplied as standard, allowing the heating system to respond to outdoor temperature conditions.

Weather Compensation

Weather compensation is included as a standard feature on the current Keston System 2 S30.

This technology allows the heating control strategy to take external temperature into account, helping the boiler adjust its operation according to changing weather conditions. Correct setup and commissioning by a qualified installer are important to achieve the intended performance.

A-Rated Energy Efficiency

The Keston 30S is an A-rated condensing heating boiler.

Keston’s product documentation identifies the System S30 as a condensing boiler with an A seasonal space-heating efficiency classification. The current System 2 S30 is also listed by Keston with an A energy efficiency rating.

Actual system efficiency will depend on the complete heating system, controls, installation, heat emitter sizing, operating temperatures and property heat demand.

Natural Gas and LPG Options

The Keston System S30 family can be configured for natural gas, with an LPG conversion option available for the current System 2 S30.

Keston states that the System 2 S30 can operate on natural gas or propane when the appropriate LPG conversion kit is used. Always verify the exact boiler configuration, gas type and conversion requirements before ordering or installation.

System Boiler for Central Heating

The Keston 30S is a system boiler, rather than a combination boiler.

A system boiler heats the central heating circuit and works with a separate hot water cylinder where stored domestic hot water is required. This can make a system boiler a suitable choice for properties with higher hot-water requirements or installations that already incorporate a cylinder.

The correct boiler output should always be selected based on the property’s calculated heat requirement rather than bedroom or radiator count alone.

Suitable for New and Replacement Heating Systems

Keston positions the current System 2 S30 as suitable for both new and replacement heating systems. Its compact dimensions and twin-flue design can provide additional flexibility during boiler replacement projects.

For replacement installations, compatibility with the existing heating system, flue arrangement, controls, pipework and hot water cylinder should be checked before purchase.

Keston 30S Specifications

Manufacturer documentation confirms the 700 × 395 × 278mm dimensions for the System S30, while the current System 2 S30 provides the updated product specification and features.

Why Choose the Keston 30S?

The Keston 30S can be considered where you need:

• A 30kW system boiler
• Condensing heating technology
• A-rated heating efficiency
• A compact wall-mounted boiler
• Fully modulating operation
• Weather compensation
• Flexible twin-flue installation
• A system boiler compatible with a separate hot water cylinder
• A solution for new or replacement heating systems

Keston 30S for European Heating Projects

EuroFuelSupply supplies heating and energy products for supported European markets, serving homeowners, installers, trade customers and wholesale buyers.

If you are purchasing the Keston 30S for a new installation, replacement project or larger heating order, contact EuroFuelSupply with your delivery country, postcode, required quantity and project requirements so the correct product configuration and availability can be confirmed.

Important: Boiler installation, commissioning, gas conversion and flue installation must be completed in accordance with applicable local regulations and by an appropriately qualified heating professional.

Keston 30S Frequently Asked Questions

What is the Keston 30S?

The Keston 30S is a 30kW gas condensing system boiler designed for central heating systems. The current Keston range identifies the updated version as the System 2 S30.

Is the Keston 30S a condensing boiler?

Yes. The Keston System S30 is a condensing boiler and carries an A seasonal space-heating efficiency classification.

What output is the Keston 30S?

The Keston 30S has a nominal 30kW heating output. Keston currently lists the System 2 S30 as a 30kW system boiler.

Is the Keston 30S a combi boiler?

No. It is a system boiler. A separate hot water cylinder is used where stored domestic hot water is required.

Can the Keston 30S use LPG?

The current System 2 S30 has an optional LPG conversion kit and can be configured for natural gas or propane. The exact configuration should be confirmed before ordering.

What are the dimensions of the Keston 30S?

The manufacturer specification gives dimensions of approximately 700mm high × 395mm wide × 278mm deep. Installation and servicing clearances must also be observed.

Does the Keston 30S support twin flues?

Yes. The current System 2 S30 supports twin-flue installations up to 27m, subject to the specific flue configuration and manufacturer installation requirements.

Is the Keston 30S suitable as a replacement boiler?

Yes, the current System 2 S30 is designed for new and replacement heating systems. However, an installer must confirm compatibility with the existing heating system, flue, controls and hot water cylinder before installation.

Does the Keston 30S include weather compensation?

The current System 2 S30 includes weather compensation as standard.

How should I choose the correct Keston boiler output?

Boiler sizing should be based on the calculated heat loss and heating requirements of the property rather than relying only on the number of bedrooms or radiators. A qualified heating professional should carry out the appropriate assessment.

Order the Keston 30S Condensing System Boiler

For current price, stock availability, delivery options and wholesale quantities, contact EuroFuelSupply before ordering. For projects involving multiple boilers, installers, developers and trade customers can request a tailored quotation.