EcoSmart Fire

EcoSmart Fire Flex 18SS Fireplace Insert

Name: EcoSmart Fire Flex 18SS Fireplace Insert
Brand: EcoSmart Fire
SKU: ESF.FX.18SS
Price: 1495.0 GBP
Availability: InStock

£1,495.00

Save £-1,495.00 Sale Sold out

In stock

Burner Finish Stainless Steel Black

Product variants

Quantity

🚚 Estimated Delivery Date:

01 September 2026

Delivery date to be confirmed via email once order is placed

Overview:
- The Flex 18SS is the smallest and narrowest single-sided fireplace insert in EcoSmart's Flex Series, a 578mm-wide opening built for a narrow chimney breast, stairwell wall or tight architectural niche where the wider Flex sizes wouldn't fit. It runs on the smallest burner in the Flex range and is rated for both indoor and outdoor installation.
Design & Build:
- Mild steel surround (zinc-sealed, high-temperature powder coat) in black, framing a single pane of toughened glass around the flame. The Grade 304 stainless steel AB3 burner delivers 5,800 BTU/h (6.1 MJ/h) from a 2.5-litre tank. The burner is available in Stainless Steel as standard, or a Black ceramic-coated finish for a flat, monochrome look, at a fixed premium.
What it does well:
- Runs 8 to 11 hours on one fill and, at 807mm tall and only 365mm deep, fits into a genuinely narrow wall recess the larger Flex sizes cannot. Rated Indoor or Outdoor, so the same unit works in a covered garden room as it does a lounge chimney breast.
Trade-off worth knowing:
- At 40m³ it's rated for the smallest room of any size in the Flex range, and the 578mm opening won't read as a wide architectural feature the way the 42SS or 50SS does. If a wider flame picture matters more than fitting a narrow wall, the 42SS steps up considerably for a moderate price increase.

Delivery Information

Standard Delivery:

Ground delivery to the easiest access point on your property. Does not include inside delivery, packaging removal or assembly.

Bioethanol Fuel:

e-NRG Bioethanol may ship separately from your EcoSmart Fire order and can arrive on a different day. A separate tracking number for the fuel order will be emailed to you.

Ship Times:

Zone 1 (England / Wales): 5-10 business days.
Zone 2 (Scotland / Republic of Ireland / Northern Ireland / Isle of Man): 10-15 business days.
Please allow 1-3 business days for the order to be processed before dispatch. Estimated ship times are subject to change due to unforeseen events.

Installation Guide:

Full installation and operating instructions: https://cdn.mad-uk.com/media/version/version/ESF-CI-MASTER-FLEX_Series-_FX-V2505_-F-lr.pdf

Category	Details
Material	Mild Steel (Zinc Sealed, High-Temp Powder Coat) Surround, Toughened Glass; Grade 304 Stainless Steel Burner
Weight	25.7kg
Dimensions (W x D x H)	578mm x 365mm x 807mm
Surround colour	Black
Burner finish	Stainless Steel (standard) or Black ceramic-coated (+£300)
Fuel	Bioethanol only (Indoor or Outdoor)
Thermal output	5,800 BTU/h (6.1 MJ/h)
Burn time	8-11 hours per fill
Fuel capacity	2.5 litres
Minimum room size (indoor use)	40m³
Burner compliance	EN 16647 compliant burner (manufacturer-approved)