Help Centre

Click on the heading of the article in red to open the full article. 

  1. What is a load limiter? 24/09/2018

    Along the top of the fire chamber is a load limiter, which is designed to restrict the operator from overloading it. This will burn off in approximately 3-7 years depending on frequency of use. The load limiter does not need replacing but the airtubes will. 

     

    Load Limiter airtubes

  2. What do I do if one of my side panels are shaking/rattling when the fire is going? 24/09/2018

    Because of the panels being interchangeable and not permanently fixed to the fire there is a small chance that occasionally a panel may rattle slightly in its channel, this is due to the small gap between the coloured panel and the channel which allows the panel to move ever so slightly.

    If this occurs then it can be remedied by removing the panel and putting a slight curve across the panel (you are only wanting to add a total of around 1mm - 2mm of curve) by flexing it from top to bottom. The easiest way to do this is to lie the panel half on a flat surface and apply weight to the bottom section on the surface and also to the top section hanging off the side. This will create a slight curve in the panel. Please note: You shouldn't bend it far enough to crease the panel or have any visible curve to it. This very small relief in the panel will mean that it sits tighter against both sides of the inside of the channel section and eliminates the rattle.

  3. How to replace the door to glass sealing gasket 24/09/2018

    Download the instructions here -  Replacing-Door-to-Glass-Sealing-Gasket.pdf

  4. What chimney sweeps can you recommend to clean the flue? 24/09/2018

    It would be great if we could keep an up to date national register of all the good chimney sweeps around the country but as you can imagine this is a somewhat transient profession and so a call through the good old yellow pages and an ask around some friends is usually the best course of action to get a sweep. 

    It is always worth asking them if they have done any local Pyroclassic fires before and if so can they tell you where so you can ask the homeowner how it went, any doubts and we are always happy to give some tips to proactive chimney sweeps.

     

  5. What size firewood should I be using in my Pyroclassic Fire? 24/09/2018

    Logs should be approximately 100- 120 mm in diameter by around 300mm - 400mm long for your Pyroclassic IV Fire.   

    Logs should be approximately 100-120 mm in diameter by around 200-250mm long for your Pyroclassic Mini Fire. 

     

     

  6. Who should I use to install the fire? 24/09/2018

    As a responsible manufacturer we recommend that all our fires are installed by a New Zealand Home Heating Association approved installer. This will ensure the fire is installed correctly and safely and will provide many years of worry free comfort.

     

     

  7. What wood should I be using? 24/09/2018

    Short answer

    DRY. This means a maximum of 25% moisture content but ideally under 18% if possible.

    Do not burn any wood which has been treated as this will release poisonous gases and dioxins. Do not use any driftwood as the salt content can cause irreparable damage to the ceramic cylinder and metal components. Younger softwoods and timber which has a higher moisture content will produce a greater volume of creosote and soot than dry, well seasoned hardwood.

    Logs should be approximately 100mm - 120mm in diameter by around 300mm - 400mm long for your Pyroclassic IV Fire.   Logs should be approximately 100-120 mm in diameter by around 200-250mm long for your Pyroclassic Mini Fire.

    Long answer

    Dry wood is a must. To get the heat out of wood the fuel must pass through several stages. Firstly, free water that is not chemically bound with the wood is driven off – even wood at 20% moisture content still has to get rid of 2 litres of water for every 10 kilograms of wood. In the second stage the wood breaks down into the volatile gases, liquids and charcoal. Finally, the charcoal is also gasified, burning with a very short flame close to the char surface that appears to glow. In wood stoves all stages proceed simultaneously.

    Wood is the most prolific worldwide, solar embedded, carbon sequestered energy source which is renewable in a human lifetime. It will provide energy when the sun is not shining and the wind is not blowing, when the outside temperature is above or way below freezing and when the electricity is not coming out of that little hole in the wall. If the abundant, worldwide timber resource is managed correctly it is the most sustainable, environmentally safe, renewable, resource we have and it has sustained mankind for centuries, providing us with warmth for the space we live in, warm water to clean with and the ability to cook food.

    With the discovery of more energy intensive and easily transportable fossil fuels, wood was relegated to a lowly place in the order of preference and although it is bulky to transport it is the safest as it does not need a specially built pipeline, it won't suddenly explode or cause devastating marine pollution and with almost no refining can be used in its raw state. The closer it is used to the place where it has grown makes this an even more environmentally friendly product.

    Most designer wood burners catering to aesthetic demands totally disregard the thermal conductivity of wood. Microscopic examination of wood shows the channels which carry the liquid nutrients up and down the tree; consequently the properties of wood are very different along the grain than across it. Heat moves along the grain about fifteen times faster than across it, therefore, solid wood across the grain does not conduct heat and is an effective insulator meaning it does not readily burn.

    When a fire is lit, even by rubbing two sticks together, the gasification process starts and it is the combustion of these gases with air that produce heat which we see as flames and smoke. When heat cannot penetrate wood easily, i.e. across the grain, the volatiles given off are not rich enough nor hot enough to burn efficiently. Efficiency apparently is not a consideration in such panoramic appliances.

    This is getting to the really nerdy bit now...

    Burning of the volatile gases delivers over 60% of the heat stored in the original log but few heaters can recover the major portion of this heat as the volatiles must be over 600°C and mixed with hot oxygen to burn them. Now these are difficult conditions to meet and here’s why: if the main air supply comes from under or around the burning logs, the glowing char consumes all of the oxygen - it takes only 5cms of glowing char to consume all the available oxygen. At that point, incomplete combustion continues as characterised by increased carbon monoxide and tars which mostly go up the chimney where the unburnt volatiles deposit on the flue walls as a highly flammable, gummy substance known as creosote. It is wrong to introduce cold secondary air above the fuel as it cools the gases below their ignition temperature and now they won’t burn at all. The requirement is to introduce a highly pre-heated but variable volume of air for the different stages of combustion. This is done very efficiently by the secondary air tubes inside the Pyroclassic IV fire.

    All fires consume large volumes of air in order to extract the oxygen required to burn their fuel. One kilogram of wood needs 3.7m3 of air to burn completely, although this is only a theoretical minimum for stoichiometric combustion. Such ideal combustion does not exist in real life as only some of the oxygen in that amount of air can be used and therefore 'cool fires' need some 200% - 300% excess air to get the oxygen they need. Therefore some 7 - 10m3 of air per kilogram of wood pass through the firebox cooling the core temperature inside it and cooling air below 600°C , which kills the reaction needed to burn the volatiles. In most fires the air needs of the fire make it work against itself making it inefficient and polluting, the excess air it uses only goes up the chimney with all that gas, tar and particulates. A Pyroclassic IV only uses super-heated air in its secondary burn cycle ensuring there is no cooling of the firebox and no excess air consumed.

    Burning wood scientifically is done very effectively by the Pyroclassic IV freestanding woodburning fire but even the cleanest and most efficient woodburning stove needs logs which are as dry as possible to give the best output from your fuel. Check the moisture content of your wood when you buy it and then let nature do the hard work for you. Stack it off the ground in an open sided, roofed store to allow plenty of air flow around it for as long as possible or at least until the moisture content is below 20%. It’s then ready to be used in your Pyroclassic fire to give you a nice warm house right through winter in the most efficient and cleanest way possible.

  8. How do I clean the outside of the Pyroclassic and the flue pipes? 24/09/2018

    The powder coated panels on the Pyroclassic IV can be wiped clean with some light detergent and warm water.  You can choose to do this with the panels on the fire or remove them for a more thorough cleaning. Be careful when you remove the front panel to not tear the insulating gasket which is on the inside of the panel: you will need to pull the centre of the panel forward slightly to allow it to clear the space behind it when you slide it up.

    The stainless steel flue pipe can be cleaned using a soft cloth with a small amount of methylated spirits soaked into it. Try to avoid touching the flue pipe with your bare hands as this leaves oils from the skin on the pipe and becomes very hard to remove once the pipes have been heat cycled.

     

     

  9. What is a Turboslide and how do I use it? 24/09/2018

    The Turboslide is the part on the front of your fire with the Pyroclassic® name plate on it. 

    The purpose of the Turboslide is to cover the air inlet hole, which allows air to enter quickly when lighting a fire to get it going. To open the hole move the Turboslide to either the left or right. When your fire has caught and is going well, cover the hole with the Turboslide by putting it back into the middle position. To make sure your Turboslide is working at its peak, remember to keep the small area around the hole (i.e. the very front part of the fire chamber) free of ash or char. Simply push back the build-up a little with the rake. If the hole is clogged it will not work as it should and the fire may be hard to start. A little bit of housekeeping pays off with a quick starting, free breathing hot fire.


    IMPORTANT: The Turboslide is for the initial start-up of fires and to help ignite fresh fuel if required ONLY. Once a hot fire is established, close off the Turboslide air supply hole by sliding the Turboslide to the middle position. With this method you will enjoy low emissions, high thermal efficiency and conserve your wood supply.


    NOT FOLLOWING THESE INSTRUCTIONS CAN RESULT IN DAMAGE TO THE AIR TUBES AND OTHER METAL COMPONENTS INSIDE THE FIRE CHAMBER.

     

     

     Turboslide

  10. Can I put a natural tile on the wall instead of the wall screens? Does this comply with the 'non combustible wall' requirements? 24/09/2018

    Any non-combustible mineral board that is directly fixed to a combustible material like timber immediately loses its non-combustible qualities and therefore the full clearances must be applied. If this board were to be packed 25mm off the combustible material underneath and then ventilated top and bottom with 25mm air gaps then this would become a non-combustible wall covering. This can be covered with any other non-combustible material you like such as tiles etc.

    As a note of caution please be aware that Fireline Gib is not a non-combustible wall covering.