Metalfire Ultime D Wood Burner Fireplace Tunnel
- Closed double-sided wood-burning fireplace - one fire warming and connecting two rooms
- 4 made-to-measure models: 800 and 1050mm wide, 500 or 750mm opening heights
- 18.2-25.2kW at up to 82.3% efficiency - Ecodesign 2022 compliant
- Dynamic triple-air combustion; made to measure in Belgium
The Metalfire Ultime D Wood Burner Fireplace Tunnel is a closed, double-sided wood fire built into a dividing wall: one firebox, glass on both faces, warming and connecting two rooms at once. It is a room-sealed appliance with a vertical lift door, made to measure in Belgium in four models - 800 and 1050mm wide, with 500 or 750mm opening heights.
Output runs from 18.2 to 25.2kW at efficiencies up to 82.3%, with full Ecodesign 2022 compliance. Dynamic combustion feeds primary, secondary and tertiary air through adjustable stainless steel baffles, keeping the burn clean and the glass clear on both sides. An external air connection makes the fire suitable for low-energy and passive houses, and the tilt-forward Easy-Clean door simplifies glass maintenance. An optional spark screen or DualMotion+ electric lift allows open-fire viewing in safety.
- Free delivery over £500
- 4.8 Google Reviews Score
- Expert Installation Available
What Makes The Metalfire Metalfire Ultime Wood Burner Fireplace Exceptional
Dynamic Combustion
Primary, secondary and tertiary air supplies with adjustable stainless-steel baffles keep the burn clean and efficient. The glass stays clearer, the fuel goes further.
Ecodesign 2022
Every Ultime D meets the strictest European standard for closed wood burning - Ecodesign 2022 compliant, EN 13229, CE certified. Compliance built in, not bolted on.
Passive-House Ready
Room-sealed, airtight construction with an external air connection - the fire draws combustion air from outside, not from your room. Approved for low-energy and passive homes
Made to Measure
Built to order, not off a shelf - custom sizes, 10mm solid steel finishing frames, interior linings from cast iron to ceramic concrete-look. You want it, they create it
Technical Specifications
Every dimension, every material choice, every specification has been considered. Built to exacting standards for those who demand excellence.
Engineered for Living — The Metalfire Ultime Wood Burner Fireplace
A closed wood fire should be as easy to live with as it is to look at. The Ultime D's door and screen systems handle the daily rituals - loading, cleaning, open-fire viewing - with quiet Belgian engineering.
Sliding Door System
The glass door slides smoothly upwards for lighting and loading, the balanced mechanism taking its full weight. Effortless, one-handed, every day.
Easy Clean Door System
The door retracts on corner and three-sided models and tilts forward on the Front, so the glass cleans quickly from both sides. A clear view of the fire, kept simple.
Spark Screen
An optional mesh screen that keeps sparks and embers where they belong - extra peace of mind with children and pets near the glass. Available in Black, Maple Gold or Terracotta.
Dual Motion Plus
The optional electric lift system operates the glass door and spark screen independently - enjoy the fire open, protected by the screen, at the touch of a button. Quiet, safe, effortless.
TECHNICAL SPECIFICATIONS
The different Models available for the Metalfire Ultime D Tunnel
MF 800-50 WHE T
MF 800-75 WHE T
MF 1050-50 WHE T
MF 1050-75 WHE T
CHOOSE YOUR FINISH
One fire, three colours, five finishes
Select a colour to see the different finishes available
Standard Finish
Original Finish
Design Finish
Round Finish
Triangle Finish
Standard Finish
Original Finish
Design Finish
Round Finish
Triangle Finish
Standard Finish
Original Finish
Design Finish
Round Finish
Triangle FinishMetalfire Ultime D Tunnel Wood Fireplace
A closed, room-sealed double-sided wood-burning fireplace set into a dividing wall - one fire, two rooms. 4 models up to 25.2kW, Ecodesign 2022 compliant, made to measure in Belgium.
Watch the Metalfire Ultime D Burn
One Fire, Two Rooms
Glass on both faces of the firebox turns a dividing wall into a shared focal point - the same living flame, enjoyed from either side.
Serious Heat, Twice Felt
Up to 25.2kW of wood-fired warmth, radiating into both rooms while the convection chamber circulates convected heat.
Effortless to Live With
The balanced lift door rises for loading and tilts forward for cleaning. Add the spark screen or DualMotion+ electric lift, and the fire can be enjoyed open, safely.
Why Choose Marlow
Expert Consultation
Our specialists guide you through every step, from selection to installation.
Premium Collections
Curated selection of the finest fireplaces from leading manufacturers.
Trusted Installation
Certified professionals ensure safe, compliant installation every time.
Lifetime Support
We're here for you long after installation, with maintenance and warranty support.
Frequently Asked Questions
What is the Metalfire Ultime D Wood Burner Fireplace Tunnel?
The Metalfire Ultime D Wood Burner Fireplace Tunnel is a closed, room-sealed double-sided wood-burning fireplace built into a dividing wall - one firebox with glass on both faces, warming two rooms at once. It is made to measure in Belgium in four models, with outputs from 18.2 to 25.2kW.
What sizes does the Metalfire Ultime D Tunnel come in?
The Metalfire Ultime D Tunnel comes in two widths - 800 and 1050mm - with opening heights of 500 or 750mm, giving four models. Your installer will help match the size to the wall and the rooms it connects.
How much heat does the Metalfire Ultime D Tunnel produce?
The Metalfire Ultime D Tunnel produces between 18.2 and 25.2kW of direct heat depending on the model, at efficiencies of 79-82.3% - one fire serving as a primary heat source for two rooms.
Is the Metalfire Ultime D Tunnel Ecodesign compliant?
Yes. The Metalfire Ultime D Tunnel meets Ecodesign 2022 standards for closed wood burning and is certified for the UK and European markets, with an A+ energy label on 800mm models and A on 1050mm models.
Can the Metalfire Ultime D Tunnel be used in a passive house?
Yes. The Metalfire Ultime D Tunnel is a room-sealed appliance with an external air connection (2x150mm), drawing combustion air from outside rather than from the room - suitable for low-energy and passive houses.
What is the difference between a tunnel and a 3-sided wood fireplace?
A tunnel fireplace has glass on two opposite faces, so one fire is shared between two rooms through a dividing wall; a 3-sided fireplace has glass on the front and both ends, viewed from three directions in the same space. The Metalfire Ultime D range offers both.
What flue does the Metalfire Ultime D Tunnel need?
The Metalfire Ultime D Tunnel connects to a 250mm flue outlet. As a wood-burning appliance it needs a suitable chimney or twin-wall flue system - your installer will confirm the right route after a survey.
What wood should I burn in the Metalfire Ultime D Tunnel?
Burn seasoned hardwood at no more than 15% moisture - beech, oak and birch are ideal. Wet or treated wood soils the glass and cuts efficiency, so wood should be dried for two to three years in a ventilated store.
How do you clean the glass on the Metalfire Ultime D Tunnel?
The Metalfire Ultime D Tunnel has a tilt-forward Easy-Clean door system - the glass panel angles towards you so both faces can be cleaned quickly. Burn dry wood and the dynamic air-wash combustion keeps the glass clearer for longer.
Who installs the Metalfire Ultime D Tunnel wood fireplace?
A wood-burning fireplace of this size should be installed by a HETAS-registered installer. Our team installs within our local radius, handling survey, flue design and commissioning; further afield we supply UK-wide and advise your installer. Call 01628 290142 to talk it through.
See the Metalfire Ultime D in Action
Contact Marlow for more information
Metalfire Ultime D Wood Burner
Metalfire Ultime D Wood Burner Fireplace
INSTALLED WITH PRIDE
Metalfire Ultime D In homes like yours
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CafeineWhy Choose the Metalfire Ultime D Tunnel Wood Fireplace
The Tunnel turns a dividing wall into a shared focal point: one firebox, two rooms, and up to 25.2kW of clean, Ecodesign-compliant wood heat - Belgian engineering connecting the home.
- ONE FIRE, TWO ROOMS
- UP TO 84% EFFICIENT, A+ RATED
- MADE TO MEASURE
The Metalfire Ultime D Wood Fireplace Collection
Front, Corner, 3-Sided, 4 Sided and Tunnel
Experience Marlow In Person
Nothing compares to seeing our range of appliances up close and interacting with them as you would at home. Visit our Marlow showroom in Buckinghamshire, to go through your ideas and discuss your options.
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