Nestor Martin Harmony lll – 12kw Multifuel Stove

£2,994.90 Inc VAT

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Nestor Martin Harmony lll - 12kw Multifuel Stove
Nestor Martin Harmony lll - 12kw Multifuel Stove
£2,994.90 Inc VAT

Stove Fitting Kit

* inc. 1m stove pipe + 800x400mm register plate

Flue Liner Fitting Kit

* inc. chimney flue liner, adapter, cowl + notice plate

Display Option

Total: £2,994.90

Delivery

  • Free Delivery
  • Delivery up to 5 working days

The Nestor Martin Harmony III Multifuel Stove is a powerful and versatile heating solution designed to deliver efficient warmth and classic cast-iron craftsmanship to larger living spaces. Engineered with high-quality construction and advanced combustion technology, this robust multifuel stove provides a strong 12kW heat output, making it ideal for open-plan rooms or sizeable lounges where reliable heat distribution is essential. Built with durable cast iron and featuring Eco Design-ready performance, the Harmony III stove combines traditional aesthetics with modern efficiency, offering cleaner combustion and excellent heat retention. With flexible top or rear flue outlet options, dual-stage air control and a substantial viewing window to enjoy the glow of the fire, the Harmony III is a timeless and practical choice for homeowners seeking both performance and style from their heating appliance.

Key Features

  • Robust 12kW Heat Output: Delivers powerful warmth suitable for larger living rooms, open-plan spaces and homes requiring strong heat performance.
  • Multifuel Capability: Capable of burning seasoned wood and approved smokeless fuels for versatile and year-round heating.
  • EcoDesign Ready & HETAS Approved: Meets modern efficiency and emissions standards for cleaner, environmentally responsible heating.
  • Cast Iron Construction: Durable, long-lasting build with excellent heat retention and classic styling that complements both traditional and contemporary interiors.
  • Flexible Flue Options: Designed with top or rear flue outlet for adaptable installation to fit a range of fireplace setups.
  • Primary & Secondary Air Control: Enables precise combustion management for efficient fuel use and cleaner burning.
  • Large Viewing Window: Enjoy an inviting view of the flame, enhancing ambience while offering practical monitoring of the fire.
  • Traditional Aesthetic Appeal: Classic stove design with smooth lines and timeless styling that elevates any living space.

Download User and Installation Instructions

Technical Details

SKUTSTV-CMF-BNMA-NHIII
BrandNestor Martin Stoves
StyleTraditional
TypeN/A
ConstructionCast Iron
Fuel TypeMulti Fuel
Heat Output12 kW
HETAS ApprovedYes
EcoDesign ReadyYes
Energy Efficiency RatingA
Stove Efficiency76%
Weight200 kg
External DimensionsH732 x W740 x D469 mm
Flue Outlet LocationTop / Rear
Flue Outlet Diameter6" (150 mm)
Primary AirYes
Secondary AirYes
ColourBlack
Warranty5 year(s)

Manufacturer: Nestor Martin Stoves

The pinnacle of wood burning technology these log burners offer a new level of performance. Crafted by the European leader in home heating technology, the Nestor Martin (formerly Efel) range of wood burning stoves is the result of uncompromising engineering and over 150 years of experience. Their ancestral tradition as cast iron founders has always been coupled with a spirit of technological innovation, and every Nestor Martin appliance carries with it a technical expertise and an integrity which is unrivalled.

Warranty Details

NESTOR MARTIN warrants that your stove will be free of defects in materials and workmanship for a period of five (5) years from date of purchase, except those parts that are subject to normal wear and tear and may be broken by wrong use: grates, gaskets, glass doors, handles, firebricks and enamelled parts. Parts subject to normal wear and tear and enamelled parts are warranted to be free of defects in material and workmanship at the installation. Any of these parts found to be defective will be repaired and replaced at no charge if the defects are mentioned a maximum of 2 days after installation. If this is the case advise your installer immediately. Parts broken after the installation due to wrong use of the stoves are not covered by this limited warranty - you will have pay any and all labour and shipping to you, installing or inspecting any replacement part(s), or stove furnished by us, and we will not be responsible for such charges or expenses under this Limited Warranty. This warranty shall not apply, and we shall have no obligations hereunder with respect to any stove, part, trim or accessory which has been subject to accident, abuse, alternation, misuse or neglect, or which has not been installed, inspected, operated and maintained in accordance with all applicable local codes and regulations and in accordance with the manufacturer's printed instructions.

Exclusions and limitations

A. OUR WARRANTY DOES NOT COVER DAMAGE RESULTING FROM OVERFIRING THE STOVE. OVERFIRING CAN BE IDENTIFIED BY WARPED PLATES AND AREAS WHERE THE PAINT PIGMENT HAS BEEN BURNED OFF. OVERFIRING OF ENAMEL STOVES IS IDENTIFIED BY CHIPPING, CRACKING, BUBBLING AND DISCOLORATION OF THE PORCELAIN ENAMEL FINISH.

B. NESTOR MARTIN OFFERS NO WARRANTY ON PORCELAIN ENAMEL PARTS SUBJECT TO ABNORMALLY HIGH TEMPERATURES OR THERMAL SHOCK. ABNORMALLY, HIGH TEMEPRATURES AND THERMAL SHOCK RESULT IN CHIPPING, CRACKING, BUBBLING AND DISCOLORATION AND CRAZING OF THE PORCELAIN SURFACES.

C. DAMAGE TO A STOVE WHILE IN TRANSIT IS NOT COVERED BY THIS WARRANTY, BUT MAY BE SUBJECT TO A CLAIM AGAINST THE CARRIER. OUR OBLIGATION UNDER THIS WARRANTY SHALL BE LIMITED TO THE FURNISHING OF REPLACEMENT PARTS, TRIM OR ACCESSORIES, OR A REPLACEMENT STOVE AT OUR OPTION, AND WE SHALL IN NO EVENT BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL OR OTHER MONETARY DAMAGES. SOME COUNTRIES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CONSEQUENTIAL DAMAGES, SO THE LIMITATIONS OR EXCLUSSIONS IN THIS PARAGRAPH MAY NOT APPLY TO YOU.

ALL IMPLIED WARRANTIES OF PRODUCTS COVERED BY THIS LIMITED WARRANTY, INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE ARE LIMITED TO A PERIOD OF FIVE (5) YEARS FROM THE DATE OF ORIGINAL PURCHASE.

EXCEPT AS EXPRESSLY STATED IN THIS LIMITED WARRANTY, WE NEITHER ASSUME, NOR AUTHORISE ANYONE ELSE TO ASSUME FOR US, ANY LIABILITY OR OBLIGATION IN CONNECTION WITH THE SALE OF ANY STOVE TO WHICH THIS WARRANTY APPLIES OR ANY PARTS, TRIM OR ACCESSORIES. IN ORDER FOR THIS WARRANTY TO BE VALID, THE WARRANTY CARD MUST BE COMPLETED AND MAILED WITHIN THIRTY (30) DAYS AFTER ORIGINAL PURCHASE TO US AT THE ADDRESS SHOWN ON THE CARD. ANY CLAIM UNDER THIS LIMITED WARRANTY SHOULD BE SUBMITTED FIRST TO THE DEALER FROM WHICH THE STOVE WAS PURCHASED. IF SUCH DEALER CAN NOT BE LOCATED, THE WARRANTY CLAIM, IN WRITING, SHOULD BE MAILED TO US AT THE ADDRESS, INDICATING THE MODEL TYPE/NUMBER, HEAT OUTPUT, SERIAL NUMBER AND THE PLACE, PRICE AND DATE OF PURCHASE.

THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND DOES NOT REPLACE CUSTOMER’S STATUTORY RIGHTS UNDER UK LAW IN RELATION TO THE SALE OF GOODS AND SERVICES.

[A few minor parts of this Warranty have been altered grammatically when converting into the English language – the essence of all aspects of the warranty remains unchanged]

Stove Options

Stove Glass Accidental Damage Cover

Replacing damaged stove glass is something most stove owners will be familiar with, be it by closing the door on a protruding log, over-tightening the glass retaining clips or the natural heat expansion of the door, chances are you have had to purchase replacement glass for your wood burning stove at least once.

By adding Glowing Embers' Accidental Damage Cover, you have peace of mind that the potentially costly process of cutting and shipping a replacement glass is covered for when those accidental breakages occur.

Terms & Conditions

Glass Protection covers you for cracked or smashed stove glass for the period of time that you select. We cover you for accidental breakage for any reason for the length of time you selected but doesn't cover for any consequential loss or installation costs. Installation is usually an easy process, and our team can talk you through it. To claim against this protection, simply send us an email prior to the expiration date (either 1 or two years from the purchase date, depending upon which option you pick) with a photo clearly showing your stove with the broken glass. We may require measurements or a template from you to cut the replacement glass accurately and your provision of this when required is conditional on our fulfilment of this protection. The protection covers you for one replacement only within the set period, additional breakages (outside of breakage on delivery which will be covered free of charge) will fall outside of this protection. This only covers flat glass cut by Glowing Embers and does not cover curved or printed glass.

Stove Fitting Kit

5" (125mm) Fitting Kit

Essential components for any stove installation into an existing chimney, this Fitting Kit for stoves with a 5" (125mm) diameter outlet collar includes an 800mm x 400mm Register Plate (Chimney Closure Plate), 5" Reducing Plate and a 1000mm length of leading brand Vitreous Enamelled Stove Pipe in 5" internal diameter.

Sited above the stove, the metal Register Plate sits on - or can be screwed up to - the 4 supplied brackets and features a pre-cut central hole (reduced to 5" diameter when used with the provided Reducing Plate) for the Stove Pipe to pass through, into the chimney cavity. This plate is easily cut to your required size and not only prevents debris or insulating granules from falling down the chimney, but also deflects heat rising from the stove into the room. The 1000mm length of leading brand Vitreous Enamelled Stove Pipe has a reduced male connection which must be fitted inside the outlet collar of the stove and sealed with our Vitcas or Kos Fire Cements, Envirograf Silicone Sealant or Heat Resistant Stove Rope. The traditional finish of our Stove Pipes not only perfectly match the body of the stove but can also withstand the heat from the burner without blemishing the finish of the flue.

6" (150mm) Fitting Kit

Essential components for any stove installation into an existing chimney, this Fitting Kit for stoves with a 6" (150mm) diameter outlet collar includes an 800mm x 400mm Register Plate (Chimney Closure Plate) and a 1000mm length of leading brand Vitreous Enamelled Stove Pipe in 6" internal diameter.

Sited above the stove, the metal Register Plate sits on - or can be screwed up to - the 4 supplied brackets and features a pre-cut 6" central hole for the Stove Pipe to pass through, into the chimney cavity. This plate is easily cut to your required size and not only prevents debris or insulating granules from falling down the chimney, but also deflects heat rising from the stove into the room. The 1000mm length of leading brand Vitreous Enamelled Stove Pipe has a reduced male connection which must be fitted inside the outlet collar of the stove and sealed with our Vitcas or Kos Fire Cements, Envirograf Silicone Sealant or Heat Resistant Stove Rope. The traditional finish of our Stove Pipes not only perfectly match the body of the stove but can also withstand the heat from the burner without blemishing the finish of the flue.

7" (175mm) Fitting Kit

Essential components for any stove installation into an existing chimney, this Fitting Kit for stoves with a 7" (175mm) diameter outlet collar includes a 1200mm x 600mm Register Plate (Chimney Closure Plate) and a 1000mm length of leading brand Vitreous Enamelled Stove Pipe in 7" internal diameter.

Sited above the stove, the metal Plain Register Plate sits on - or can be screwed up to - the 4 supplied brackets and simply requires a 7" hole cutting in it for the Stove Pipe to pass through, into the chimney cavity. This plate is easily cut to your required size and not only prevents debris or insulating granules from falling down the chimney, but also deflects heat rising from the stove into the room. The 1000mm length of leading brand Vitreous Enamelled Stove Pipe has a reduced male connection which must be fitted inside the outlet collar of the stove and sealed with our Vitcas or Kos Fire Cements, Envirograf Silicone Sealant or Heat Resistant Stove Rope. The traditional finish of our Stove Pipes not only perfectly match the body of the stove but can also withstand the heat from the burner without blemishing the finish of the flue.

8" (200mm) Fitting Kit

Essential components for any stove installation into an existing chimney, this Fitting Kit for stoves with an 8" (200mm) diameter outlet collar includes a 1200mm x 600mm Register Plate (Chimney Closure Plate) and a 1000mm length of leading brand Vitreous Enamelled Stove Pipe in 8" internal diameter.

Sited above the stove, the metal Plain Register Plate sits on - or can be screwed up to - the 4 supplied brackets and simply requires an 8" hole cutting in it for the Stove Pipe to pass through, into the chimney cavity. This plate is easily cut to your required size and not only prevents debris or insulating granules from falling down the chimney, but also deflects heat rising from the stove into the room. The 1000mm length of leading brand Vitreous Enamelled Stove Pipe has a reduced male connection which must be fitted inside the outlet collar of the stove and sealed with our Vitcas or Kos Fire Cements, Envirograf Silicone Sealant or Heat Resistant Stove Rope. The traditional finish of our Stove Pipes not only perfectly match the body of the stove but can also withstand the heat from the burner without blemishing the finish of the flue.

Flexible Chimney Liner Kit

5" (125mm) Flexible Chimney Liner Kit

Simply select your required length of Flexible Chimney Liner to complete your stove installation into an existing chimney with our essential Chimney Liner Install Kit.

This kit includes the Adapter to connect to 5" diameter Stove Pipe, your choice of 6-12m of 5" Helix twin-skinned, 316 grade, stainless Flexible Chimney Liner (suitable for use with all solid fuels, gas and oil and comes with a lifetime of the appliance warranty), a stainless Hanging Cowl with Bird Guard Mesh for chimney pots and a building regulation required Chimney Notice Plate.

6" (150mm) Flexible Chimney Liner Kit

Simply select your required length of Flexible Chimney Liner to complete your stove installation into an existing chimney with our essential Chimney Liner Install Kit.

This kit includes the Adapter to connect to 6" diameter Stove Pipe, your choice of 6-12m of 6" Helix twin-skinned, 316 grade, stainless Flexible Chimney Liner (suitable for use with all solid fuels, gas and oil and comes with a lifetime of the appliance warranty), a stainless Hanging Cowl with Bird Guard Mesh for chimney pots and a building regulation required Chimney Notice Plate.

8" (200mm) Flexible Chimney Liner Kit

Simply select your required length of Flexible Chimney Liner to complete your stove installation into an existing chimney with our essential Chimney Liner Install Kit.

This kit includes the Adapter to connect to 8" diameter Stove Pipe, your choice of 6-12m of 8" Helix twin-skinned, 316 grade, stainless Flexible Chimney Liner (suitable for use with all solid fuels, gas and oil and comes with a lifetime of the appliance warranty), a stainless Hanging Cowl with Bird Guard Mesh for chimney pots and a building regulation required Chimney Notice Plate.

Stove Essential Extras

Carbon Monoxide (CO) Alarm

Legal requirement for all stove installations, add an easy to fit CO Alarm to your order so you're ready for a safe stove installation. Free standing or wall mounted (see our Carbon Monoxide (CO) guide for correct placement), this alarm comes supplied with batteries for a minimum seven years continuous operation and meets the requirements of Building Regulations Approved Document J.

Stove Pipe Thermometer

Add our simple to read Stove Pipe Thermometer to your order and start operating your stove at its optimum performance from day one. Intended for fixing to the first length of single wall stove pipe, this thermometer accurately displays the burning temperature in both °C and °F as well as illustrating temperature zones for best operation, too hot and too low.

500g Fire Cement

Ideal for a variety of applications, Fire Cement is an essential extra for all stoves as it is required for sealing stove pipe, outlet collar and Flex Adapter connections as well as around Register Plates to prevent loss of gases and heat from the system. This ready mixed black Fire Cement creates smoke tight seals once fully cured.

Double Socket Adapter

An essential for any European model of stove, you simply won't be able to connect your flue pipe without our Double Socket Adapter. Designed to secure over the stove's outlet collar (which will be a male spigot), the Adapter converts it to a female socket to allow your Stove Pipe or Twin Wall Adapter to connect securely and safely.

(Acorn) Black Stove Companion Set

Don't forget to add a Companion Set to your order as you'll wish you have one when first lighting the stove! This 530mm tall, traditionally designed set is finished in black and features all the essential fireside tools you need suspended above a sturdy base - Tongs for positioning logs inside the firebox, a shovel and brush for cleanly removing ash and a poker to stoke the fire.

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