EcoSmart Fire

EcoSmart Fire Flex 140SS Fireplace Insert

Name: EcoSmart Fire Flex 140SS Fireplace Insert
Brand: EcoSmart Fire
SKU: ESF.FX.140SS.BXL
Price: 11395.0 GBP
Availability: InStock

EcoSmart Fire Flex 140SS Fireplace Insert

£11,395.00

Save £-11,395.00 Sale Sold out

In stock

Triple-burner output even with a single log box fitted
Free UK Delivery
Up to 45,000 BTU/h (triple XL900) Ethanol Burners

Configuration Log Box – Left Log Box – Right Log Boxes – Both Sides

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 140SS is one of three sizes in the Flex range, alongside the 60SS and 78SS, that ship without a full-width All Flame option — there is no way to get all 3770mm as unbroken flame at this size.
Design & Build:
- Zinc-sealed mild steel surround and toughened glass, built around triple Grade 304 stainless XL900 burners for a single log box (left or right), stepping down to twin XL1200 burners when boxes sit on both sides. 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:
- A single log-box configuration runs 8 to 13 hours per fill on 45,000 BTU/h and is rated for a 330m³ room, matching the smaller 122SS All Flame's own output despite losing part of the opening to storage. Log boxes on both sides trade some of that output for storage on both ends.
Trade-off worth knowing:
- Because every 140SS carries at least one log box, you cannot get an unbroken 3770mm flame band at this size the way All Flame does on the 122SS or 158SS either side of it. If that matters more than the log storage, one of those sizes suits the brief better.

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

Key Points of Interest

3 configurations at one price: Log Box Left, Log Box Right, Log Boxes Both Sides
8-13 hour burn time with a single log box
Stainless Steel or Black burner finish, +£1,500

Specifications

Category	Details
Material	Mild Steel (Zinc Sealed, High-Temp Powder Coat) Surround, Toughened Glass; Grade 304 Stainless Steel Burner
Weight	195kg (single log box), 194kg (log boxes both sides)
Dimensions (W x D x H)	3770mm x 365mm x 807mm
Surround colour	Black
Burner finish	Stainless Steel (standard) or Black ceramic-coated (+£1,500)
Fuel	Bioethanol only (Indoor or Outdoor)
Thermal output	45,000 BTU/h (47.48 MJ/h)
Burn time	8-13 hours per fill
Fuel capacity	27 litres
Minimum room size (indoor use)	330m³
Burner compliance	EN 16647 compliant burner (manufacturer-approved)
Configuration options	Every Flex 140SS ships with at least one log-storage box — there is no full-width All Flame configuration at this size, the same pattern as the 60SS. Log Box – Left/Right run triple XL900 burners (45,000 BTU/h, 27L, 330m³); Log Boxes – Both Sides steps down to twin XL1200 (30,580 BTU/h, 20L, 230m³). All three configurations are the same price.