Cleanburn is a tertiary air flow within the stove bringing air in at a higher level of the combustion chamber to force the volatiles in the smoke back into the fire to re-burn them for cleaner emissions.

Airwash is a system where airflow is directed down the glass pushing volatiles back into the fire to help keep the glass clean when burning for a better view of the fire.

This is highly dependent on the fuel you burn.  Most Airwash Systems do a great job, however wet or green wood and bad quality fuels can still blacken the glass. You need to burn the stove hotter to get cleaner glass.

This means the appliance is adapted so as to be capable of burning wood, coal and smokeless fuel. Although most manufacturers specify wood or smokeless fuel and not coal, largely down to environmental reasons and high bitumen and creosote contents.

Hetas are the governing board over solid fuel heating, very much like Gas Safe are to gas. They have played a key part in setting a standard for stove installations. Getting a Hetas registered engineer should mean the appliance is fitted to the correct standard.

Stoves control is centred less around heat output and more on the length of the burn time. Different stoves handle at different levels with the cheaper stoves tending to be less controllable. Also fuel quantities can help (Ie. less fuel = less heat.)

Yes you can, but it is essential that everything conforms with Document “J” of the building regulations for safety reasons.

Document J covers the building regulations regarding the installations of stoves, flues and open fires. These regulations do need to be kept to, not only for a correct sign off but also to make sure certain issues are addressed that help the stove to perform correctly.

Seasoned wood relates to wood that has been stored outside undercover with exposed sides for at least a season of 12 months. Weather changes going from hot, cold, wet and dry will expand and contract the wood pushing the sap out. Most stove manufacturers recommend wood dried for at least 2 seasons.

Neither one is really better than the other. Cast iron tends to be the preferred medium as cosmetically it looks better due to the ability to mould pictures or patterns, but heat transfer is near enough the same between them. Most contemporary appliances lean towards steel for its clean lines on a finished product.

Since 1965 the Building Regulations have stated that all flues must be lined and insulated, during construction.  This is usually done with clay liners, which should last the life of the building.  However, in houses built prior to 1965, lining was uncommon and these flues were usually “parged” (rendered) on the inside with lime mortar.

There are a number of reasons why an old chimney may need lining;

  • The flue is leaking smoke and fumes into other rooms or parts of the building.
  • Condensates or tar are seeping through the chimney walls causing staining, either inside or outside the building.
  • The flue is much too large for the type of fire or appliance being used, resulting in rapid expansion and consequent overcooling of the flue gases.
  • The flue is too cold, particularly if on an outside wall, and is not drawing properly.
  • The old flue surface is eroded and rough, causing frictional resistance to the flow of the gasses resulting in a poor up draught.
  • The chimney was built since 1965;
    • With the liners fitted the wrong way up, allowing tar and condensate leakage.
    • The liner cement bonding has spilled out of the joints (snotting), disrupting flue gas flow and causing poor draw.

Lining the flue will eliminate any of above problems. A lined chimney creates a continuous smooth flue with reduced surface for tar and soot to condense. It also substantially decreases the chimney volume, encloses the gases in a flue with a consistent diameter and gives a flue with greater insulation properties. The warmer flue gases result in the flue collecting less deposits, making cleaning all the easier and minimising condensation. Tar that does form can flow directly back to the stove to be re-combusted as opposed to building up in the rough crevices of a masonry chimney.

Even without a chimney options are available thanks to twin-wall stainless steel and Pumice chimney systems. Although there are limitations due to termination heights, distances from combustible materials and limitations on the amount of bends there can be, you do need a class 1 flue system.

There are more limited models available with differing capabilities / capacities but options are there between say 24,000 btu’s up to 100,000 btu’s dependent on your requirements. Also options are available for clip in boilers which usually manage 8,000 btu’s up st 24,000 btu’s for just domestic hot water or perhaps a couple of radiators.

Yes; for any outputs over 5kw rating. It doesn’t matter whether it is a large or small room or whether the room has gaps around doors, windows or trickle vents as it must have a dedicated, permanently open air vent over 5kws.

Yes, although this is dependent upon the fuel used and quality of appliance. Smokeless fuels should allow overnight burning at low rates of combustion. Seasoned wood should give maximum 3-4 hours.

Open fires are considered to be 20% efficient at converting fuel into heat. Stoves, on the other hand, are considered to be 80% efficient.

It's also worth remembering that an open fire will still be drawing even when not lit, actually removing heat from the room!

Measure the height, length and width of your room, multiply them together to give you the volume of the room and divide that by 14 to estimate the required KWs.

For example: A room 6.5m x4.5m x2.4m has a volume of 6.5x4.5x2.4=70.2m dividing this by 14 gives 5.014 or approximately 5kW.

If you have measured the room in feet and inches calculate the volume then multiply this figure by 0.028368 to convert to cubic meters before dividing by 14.

Yes. All of our multi-fuel stoves will burn smokeless fuels and most can be adapted to comply with DEFRA regulations. With the changing laws, the Stove Industry Alliance and most stove manufacturers continue to work on the development design of their stoves making them ever more efficient and eco-friendly.