Firewarm Stoves with and without back boilers

Multi fuel from 4KW to 30KW

Multi Fuel Stoves

The Firewarm range of multifuel stoves is ideal for burning wood, coal or peat.

Using the best in high temperature glass, combined with Firewarm combustion technology delivers consistently clean glass for unrestricted viewing of the fire through the large glass window.

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price range from 4 Kw €350 to 30KW with back boiler €1,700

All price included Vat. Delivery extra.

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Air-tight fires for energy rated houses.

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To burn any solid fuel efficiently two stages of combustion must be achieved: Primary Combustion and Secondary Combustion (also known as gasification).
• Primary combustion is normal burning as occurs in a traditional open fire. Gasses are released by the solid fuel naturally during primary combustion and in an open fire the chimney draws these un-burnt gasses and a substantial amount of heat straight out into the atmosphere. Open fires therefore result in a very poor combustion efficiency and typically an open fire has an efficiency of 25% or lower. As well as poor combustion efficiency in a traditional open fire other downsides include high fuel consumption, soot deposits collecting in the chimney increasing the risk of chimney fires and the release of harmful smoke emissions to the environment.
• To improve the combustion efficiency enormously secondary combustion or gasification must occur and with our contemporary closed fire and stove systems a number of factors enable gasification to occur:

• 1. Firebox Temperature • The construction of the closed firebox or stove retains the heat from primary combustion very effectively. Depending on the individual appliance this is achieved by the material used (cast iron or high temperature natural firebrick linings) as well as high temperature insulation. Much higher temperatures in the firebox need to be reached (typically over 571 Degrees Celsius) for secondary combustion to occur and this temperature can never be reached in an open fire. At the higher temperature the primary combustion gasses from the solid fuel ignite and secondary combustion occurs.

• 2. Flue Valve • Each manufacturer has their own unique flue valve system and the end result is basically the same. The flue valve is normally controlled automatically and its function is to retain the primary combustion gasses within the firebox until the high temperature is reached. Unlike a traditional open fire the chimney is only fully open when the door of the appliance has been opened for re-fuelling. Yes it is always open to some degree to allow smoke to exit but the flue valve deflects the gasses back into the firebox to be burned.

• 3. Secondary Air Supply • The introduction of a secondary air supply to the firebox is also very important if secondary combustion is to occur. Typically a primary air supply will be delivered to the fire from underneath the fire bed for primary combustion. A secondary air supply is then introduced higher up on the firebox normally, but nor always, through channels around the door.

• It is the combination of the secondary air supply, the high firebox temperature and the primary combustion gasses in the firebox that results in Secondary Combustion or gasification giving very high levels of combustion efficiency.

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