# MI Fires Derwent Large Wood Burning / Multifuel Ecodesign Stove

A powerful, UK-designed multifuel stove built to deliver dependable warmth across larger living spaces. The MI Fires Derwent Large produces a substantial 8kW heat output with 79.4% efficiency and flexible fuel options – ideal for homeowners who need stronger heating performance without compromising on modern emissions standards.

  

## Why Choose This Model?

The Derwent Large is an excellent choice if you need a higher-output stove with the flexibility to burn both wood and approved smokeless fuels. Its 8kW heat output makes it well suited to larger rooms and more open living spaces, while its 79.4% efficiency and A energy rating help make effective use of fuel. With Ecodesign compliance, DEFRA approval and external air compatibility, it combines strong everyday heating with modern clean-burning performance.

### Key Features

-   **8kW heat output** – ideal for larger living rooms, open-plan spaces and properties with greater heating requirements.
-   **Multifuel capability** – burns wood logs and approved smokeless fuels.
-   **Ecodesign 2022 compliant** – meets modern efficiency and emissions requirements.
-   **Smoke Control Area exempt (DEFRA approved)** – suitable for use in designated Smoke Control Areas.
-   **79.4% efficiency** – delivers dependable heat while making efficient use of fuel.
-   **A energy rating** – efficient performance for everyday home heating.
-   **Steel body with cast iron door** – durable construction designed for regular use.
-   **Airwash system** – helps keep the viewing glass clearer for a better view of the flames.
-   **External air compatible** – suitable for installations where an external air supply is required.
-   **Multifuel grate** – designed for burning both wood and approved smokeless fuel.
-   **Designed in the UK** – developed with a focus on reliable heating, efficient combustion and low emissions.

### Technical Highlights

-   Rated heat output: 8kW
-   Efficiency: 79.4%
-   Energy rating: A
-   Weight: 100kg
-   NOx emissions at 13% O₂: 101mg/Nm³
-   Fuel type: Multifuel
-   Construction: Steel body with cast iron door
-   Ecodesign 2022: Yes
-   DEFRA Approved: Yes
-   External air compatible: Yes
-   Flue size: 5-inch (125mm)
-   Flue outlet: Top only

  

### Specifications

Guarantee

2 Years

Efficiency

79.40%

Heat Output

8 kW

Nox Emissions at 13% O2

101 mg/Nm3

Energy Rating

A

DEFRA Approved

Yes

Airwash System

Yes

Construction

Steel Body - Cast Door

Flue Outlet

Top Only

Flue Size

5-inch (125mm)

Fuel Type

Wood or Multi Fuel

Fuel Grate Type

Multifuel Grate (to burn Wood & Smokeless Coal)

Suitable For 12mm Hearth

Yes

External Air Compatible

Yes

Distance to Combustibles - Sides

580 mm

Distance to Combustibles - Rear

380 mm

Sweep Flue through Stove?

Yes

Colour

Black

More Colours

No

Colour Options

Blacks

Finish

Matt

### Product Dimensions

![](https://cdn.shopify.com/s/files/1/1029/2396/0650/files/mi_fires_derwent_large_multifuel_stove_-_dimensions.png?v=1787909871)

Overall Width

585.5 mm

Overall Height

504 mm

Overall Depth

317.5 mm

Rear to Centre of Top Flue (F)

127.5 mm

Width to Centre of Top Flue (E)

252 mm

Depth to Centre Flue (D)

190mm

Weight

100 Kg

### Installation Guide

[Click here to view installation guide.](https://cdn.shopify.com/s/files/1/1029/2396/0650/files/mi_fires_install_derwent_large.pdf?v=1788347063 "Install Guide")

### Liner Kit (Optional)  
  

![](https://cdn.shopify.com/s/files/1/1029/2396/0650/files/LINER_KIT.png?v=1788437904)

**Liner Kit Includes**

-   10m 316-grade flue liner
-   Pot hanging cowl
-   Liner adaptor
-   500mm vitreous stove pipe
-   Register plate
-   Carbon monoxide (CO) alarm
-   Data plate

## Details

- **Price:** 988.59 GBP - 1048.59 GBP
- **Vendor:** Mi Fires
- **Type:** wood stove

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| No | 988.59 GBP | In stock |
| Yes | 1048.59 GBP | In stock |

## Images

- MI Fires Derwent Large Wood Burning / Multifuel Ecodesign Stove
- MI Fires Derwent Large Wood Burning / Multifuel Ecodesign Stove
- MI Fires Derwent Large Wood Burning / Multifuel Ecodesign Stove
- MI Fires Derwent Large Wood Burning / Multifuel Ecodesign Stove
- MI Fires Derwent Large Wood Burning / Multifuel Ecodesign Stove
- MI Fires Derwent Large Wood Burning / Multifuel Ecodesign Stove
- MI Fires Derwent Large Wood Burning / Multifuel Ecodesign Stove

---

> Source: [Pro-Line Direct](https://prolinedirect.co.uk/products/derwent-large-wood-burning-multifuel-ecodesign-stove)
> Updated: 2026-09-07