Flex 18SS Single Sided Fireplace Insert


Specifically designed for a single room application, the Flex Single Sided Fireplace Insert features one open side, enabling the flame to be viewed from the front.


Included Accessories

Jerry Can 5L , XL Baffles , Black Glass Charcoal , Lighting Rod , Fire Lighter


Add Accessories
Bio Ethanol Fuel £130


Enjoy an alluring flame from any angle you look at it.Specifically designed for a single room application, the Flex Single Sided Fireplace Insert features one open side, enabling the flame to be viewed from the front. The bioethanol, true zero-clearance fireplace can be used to create a striking addition to a feature wall, integrated within cabinetry or a fireplace setting – whether in a residential dining room, indoor or outdoor living area, or commercial spaces.

The clean lines and ‘all flame’ configuration of the 18SS means the entire viewing area is dedicated to the eye-catching flame, creating a harmonious blend of traditional style and contemporary design.The included AB3 Burner holds 2.5L of clean burning e-NRG bioethanol and will deliver a magical dancing flame for up to 11 hours. It is designed to deliver robust performance with the power to heat approximately 20m2, making it ideal for smaller residential spaces.

Manufacturer approved surround for the BS EN16647 Compliant AB3 burner.

Fuel Efficency 


Volume Capacity 2.5 Litres [0.7 Gallons]
Heats on average 20m2 [215ft2]
Minimum Room Size 40m3 [1413ft3]
Burn Time 8 – 11 Hours
Thermal Output 5800 BTU/h 1.7kW 6.1 MJ/h






* WEIGHT: 25.70kg [56.66lb]

* MODEL DIMENSIONS mm [in]: W 578mm [22.8in]D 365mm [14.4in]H 807mm [31.8in]

* VIEWING AREA mm [in]: W 378mm [14.9in]D 340mm [13.4in]H 502mm [19.8in]

* MATERIALS: Mild Steel & Toughened Glass

* COLOURS:  Black




Key Features




Indoor or outdoor single room application. With one open side, view the flame from the front.


Available in black, firebox comes with stainless steel burners and decorative Black Glass Charcoal.
No gas or electricity


No gas, no electricity, no chimney, no venting or external vent cap. 4 fewer General Contractors.
Clean burning


All the fuel is housed within Flex’s self-contained burner so you don’t have to run a gas line or electric wires through your walls. And because e-NRG Bioethanol is clean burning, you don’t need a flue or a chimney
Zero clearance


Self-contained, zero clearance construction allows your Flex fireplace to be framed into wood or metal studs, providing installation freedom and flexibility for builders.
Quick and easy assembly


Requiring virtually no assembly, Flex Fireboxes are designed to be placed into the desired location, safely secured into position, and operated immediately.
Rust proof


Zinc sealed steel construction powder coated with super hi-temp black paint prevents rusting so all fireplaces can be used both indoors or outdoors.
Luxurious finish


Available in a timeless black finish, Flex Fireboxes come with stainless steel burners and black glass charcoal.
Wind screen

Included integrated windscreen sits flush behind frame.
Tested world wide

Our collection has been thoroughly tested against a number of global standards and is O-TL Listed in accordance with UL 1370 in the USA, certified in accordance with EN16647 in Europe and the UK, and satisfies the ACCC Safety Mandate for Australia.

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Technical Drawings