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EcoSmart Fire Flex Double Sided Ethanol Firebox

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EcoSmart Fire Flex Double Sided Black Ethanol Firebox

EcoSmart Fire Flex Double Sided Built-in Ethanol Firebox is a modern, clean and green fireplace solution for your indoor and outdoor space. The minimalistic and see-through design of this firebox will make the eye-catching flames the focal point in two different rooms. It will definitely compliment any interior, from modern to traditional.

Installation is flexible and doesn't require expensive remodeling. This ethanol firebox runs on liquid bioethanol fuel and does not need to be connected to a gas line or electricity. Chimney or vent is not necessary either. Just install it where you want it, pour some fuel, light it up and enjoy beautiful real flames without any smoke, fumes, or mess.

Available in 9 sizes from 15" to 159" wide, based on the firebox viewing area. It is best to install this firebox between two interior rooms or a dividing wall to make the most out of the double-sided design.

Enjoy the warmth and ambiance of a real flame fireplace any time and anywhere with an EcoSmart Fire ethanol fireplace!

Flex series ethanol fireboxes are available in configurations and sizes to make sure that you get the fireplace you want. Just choose based on where it will be installed or your custom design: Click here to see them all.

This firebox is also available in other configurations: EcoSmart Fire Flex Collection


  • Built-in See-Through Ethanol Firebox for Indoor or Outdoor Multi-room Installation
  • Ventless - 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
  • Easy or no Maintenance Required
  • 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.
  • 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.
  • Luxurious Finish - timeless black finish firebox with high-quality 304 stainless steel burner and black glass charcoal.
  • 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
  • Seamless Construction - ensures no leaks or corrosion on the seams
  • Sliding Door Shut-off Mechanism - quickly and safely extinguish the fire and regulate flame height and fuel consumption
  • Adjustable Flame - allows you to control the flame intensity and heat output
  • Safe Filling - safer than most other ethanol fireplaces
  • 2 Glass Windscreens Included for safety and wind protection
  • Comes With: Lighting Rod, Jerry Can, Bottle Adaptor, Fire Lighter, Butane (for lighter), and Black Glass Charcoal
  • UL Listed - thoroughly tested to meet safety standards in the USA
  • ISO Certified
  • ICC Certified
  • 2-Year Manufacturer's Warranty
  • Uses Clean-burning Bioethanol Fuel (Purchase separately)

This firebox is also available in other configurations: EcoSmart Fire Flex Collection


15" 0.7 Gallons 8-11 hrs 5,800 215 sq.ft 19.8" L x 14.9" W x 13.4" D 58.42 lbs
32" 1.3 Gallons 10-13 hrs 11,430 431 sq.ft 19.8" L x 31.9" W x 13.4" D 103 lbs
42" 1.8 Gallons 9-12 hrs 13,650 538 sq.ft 19.8" L x 41.9" W x 13.4" D 135 lbs
50" 2.4 Gallons 8-13 hrs 15,000 646 sq.ft 9.8" L x 50" W x 13.4" D 156 lbs
68" 2.6 Gallons 9-14 hrs 15,290 700 sq.ft 19.8" L x 68.1" W x 13.4" D 211 lbs
86" 4.8 Gallons 8-13 hrs 30,000 1,292 sq.ft 19.8" L x 86.2" W x 13.4" D 226 lbs
104" 5.3 Gallons 9-14 hrs 30,580 1,399 sq.ft 19.8 " L x 104" W x 13.4" D 313 lbs
122" 7.1 Gallons 8-13 hrs 45,000 1,938 sq.ft 19.8" L x 122" W x 13.4" D 321 lbs
159" 7.9 Gallons 9-14 hrs 45,870 2,099 sq.ft 19.8" L x 159" W x 13.4" D 500 lbs




WARNING: The use of this product and byproducts of the combustion of fuel, such as propane, natural gas, and/or ethanol can expose you to chemicals including formaldehyde, which are known to the State of California to cause cancer, and including acetaldehyde, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to

Free and Fast Shipping! Read our full Shipping Policy here.

We offer market-leading 30-Day Free Returns! Read more about our Returns Policy here.

EcoSmart Fire offers a full 2-year warranty from date of purchase on stainless steel parts including raw, linished and powder coated.

Mild steel including powder coated and chrome plated, concrete composite, glass, leather, fabric and MDF (painted or cement rendered) are covered for 1 year from the date of purchase.

Chips and scratches are not covered by warranty. Natural variation in color, texture and porosity may occur with Concrete Composite products and are considered inherent and valued qualities of the material. Non-structural hairline cracks are possible and shall not be considered a manufacturing defect.

What if I have modified the product?

If the product has been modified or altered in any way, it will not be covered under warranty unless the modifications were approved in writing by EcoSmart Inc or The Fire Company Pty Ltd. However, EcoSmart Fire is happy to provide assistance with any issues you are experiencing.

How do I submit a warranty claim?

You will need to provide proof of purchase along with a description and images of the issue. Once you’ve gathered this information, please email all details to Your claim will be reviewed within 7 days and you will be contacted with a decision and the next steps, if applicable.

Customer Reviews
5.0 Based on 2 Reviews
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Jason S.
Philippines Philippines
I recommend this product
Versatile for both indoor and outdoor design

The EcoSmart fire was the perfect solution to softly dividing the space; it fits so well with the mood of the room, and it is more interactive than a screen. They are so versatile for both indoor and outdoor design, and are easier to work with than a traditional fireplace – much less mess.

Anne M.
Philippines Philippines
I recommend this product
Simple and elegant design

The firebox has a simple and elegant design and a double opening, which enables the fire to be seen from around the room. The design of the fire is modern and simple but it still offers the comfort of a traditional fireplace and provides atmospheric warmth and comfort.

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