Pyroclassic Fire in Flat White - Side Angle

Why You Should Choose a Pyro Fire

True Kiwi Innovation

The Pyro Classic Wood Fire was developed by scientists at the DSIR (New Zealand Department of Scientific & Industrial Research).

They were tasked with creating the ultimate solution for burning wood in the most economic and environmentally conscious way and so, after years of design and research, the Pyro Classic was born.

For more than 40 years, this unique kiwi fire has led the global market in efficiency.

The ‘Heat Sustainer

Massive Heat Storage

Designed to keep you warm long after the fire has burned down.

Weighing in at a whopping 45kg (for Pyro Classic), the Heat Sustainer is formidable thermal mass capable of absorbing and storing an abundance of heat.

This ceramic firebox stores more heat than any other conventional wood fire through a slow and even release of its heat over an extended period.

Mockup of the Pyro Heat Sustainer firebox

Circular Encapsulation

The cylindrical design enables circular encapsulation allowing for a more complete burn and extraction of fuel from your wood.

Circular encapsulation improves efficiency and is more cost effective. 

Heat Sustainer with arrows showing direction of flames

Heat Sustainer
VS Conventional Steel Firebox

Heat Sustainer From Pyro Fires

Heat Sustainer with arrows showing direction of flames

30mm Thick Ceramic
Ceramic not only absorbs and stores more heat than steel, it also releases it slower and more evenly. As a result, less wood is burned to maintain a warm home.

Cylindrical Design
Circular encapsulated flames allow for a more complete burn and extraction of fuel from your wood.

 Ceramic Cylinder
Is indestructive to heat beyond what burning wood can achieve.

Conventional Steel Firebox

Firebox with flames escaping to corners

Absorbs heat rapidly, but can’t store it. Heat escapes just as quickly as it appears, using more wood to heat your home.

Rectangular Box
Flames escape to the corners leading to an incomplete burn and extraction of fuel from the wood.

Welded Steel
Is destructible to heat. Expands and contracts as it heats up and cools down, compromising the integrity of the welded firebox over time.

Heat Sustainer Benefits

Of a Large Ceramic Fire Chamber

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Reduced Heating Costs

Compared to a steel firebox, a hot ceramic chamber will burn less wood to maintain its temperature.

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Burns Less Wood

Circular design for circular flame encapsulation. Provides a more complete and thorough burn.

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Stores Heat

The Heat Sustainer absorbs and stores heat which will continue to keep you warm long after the fire has burned down.

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Genuine Overnight Burn

Keep toasty through the night and wake up to a warm home.

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Less Effort

Wood is burned more thoroughly requiring less reloading, log splitting, carrying…less work in general.

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A Healthier Home

Even after the fire has burned down, the Heat Sustainer will slowly and evenly release its stored heat to fight one of the leading causes of dampness – cold rooms.

….It’s a really clever design”

Heat Sustainer Review by Architect, Guy Marriage

Architect Guy Marriage discusses why he chose a Pyro Fire for ‘Stilt House’, as seen on Grand Designs NZ episode 12.

“The Pyro Classic has been developed to be the most fuel efficient firebox that you can get in New Zealand and that’s why we wanted one.”

Guy Marriage

Director & Architect, First Light Studio

Heat Sustainer FAQ

Why do the majority of fireplaces on the market come with inefficient steel fireboxes rather than full ceramic chambers?

Great question. Steel fireboxes are generally cheaper and easier to mass produce. It’s as simple as that really.

Is this [insert expensive, high-end fireplace] with a square, steel firebox not efficient?

Because the steel can’t retain heat and its shape won’t allow for cicular encapsulation, it won’t be as efficient as it could be. 

How does the Heat Sustainer keep me warm after the fire has burned down?

Firstly, the Heat Sustainer is able to absorb and store an abundance of heat thanks to its large size. Secondly, ceramic loses heat at a much slower rate than steel which means once your fire burns down, the Heat Sustainer will continue to release that stored heat evenly over a number of hours. 

I've heard that the Heat Sustainer can provide up to a 12 hour burn time. Is it true or just marketing fluff?

Check out the video time-lapse below to see a 12 hour burn in action.

Timelapse Video

Overnight Burn in Action

Environmentally Conscious Choice

Pyro Fires are Ultra Low Emissions Burners

All Pyro Fires are low emission burners, with an emissions rate of only 0.3g/kg – less than half that of most other clean air wood fires. Due to the impressive heat storage capabilities of the fire chamber, Pyro Fires consume considerably less firewood. At a fuel consumption rate of only 0.9kg per hour for the Pyro Mini and 1.1kg per hour for the Pyro Classic, a Pyro Fire is a smart choice for the environment and your wallet!

CarboNZero Logo
"ULEB Ultra Low Emissions Burner"
Recycling Logo

Colour Range

Up To 100 Colour Options

If the traditional black box wood fire isn’t for you, then you have come to the right place. Choose from up to 100 colour variations, from bold and bright to classic neutrals. Dare to be different with our colour upgrade Simply choose whether you prefer a Grey or Black fire body (top plate and door) and then explore our huge range of panel colours.

Any Questions?

Purchase a Pyro Fire