What's the difference between chimney and fireboard?

Chimney

Definition:

(n.) A fireplace or hearth.
(n.) That part of a building which contains the smoke flues; esp. an upright tube or flue of brick or stone, in most cases extending through or above the roof of the building. Often used instead of chimney shaft.
(n.) A tube usually of glass, placed around a flame, as of a lamp, to create a draft, and promote combustion.
(n.) A body of ore, usually of elongated form, extending downward in a vein.

Example Sentences:

(1) On the banks of the Firth of Forth, the Longannet power station dominates the wintry horizon, a massive box in the shadow of its skyscraper chimney stack.
(2) The tea-shop owner’s home is just a couple of hundred metres from a huge, ageing coal-fired power plant in central Turkey , whose red-and-white chimneys spew dirty fumes.
(3) Air pollution was not the most immediate of problems but the canopy of smoke that belched from industrial and domestic chimneys began to attract attention.
(4) The Prestonpans factory was eclipsed by an even greater one – for a time it boasted the world’s highest chimney – that made bleach and sulphuric acid on the outskirts of Glasgow; and it was in Glasgow that some of the earliest cases of acid violence were recorded.
(5) The rapid acidification is caused by the massive amounts of carbon dioxide belched from chimneys and exhausts that dissolve in the ocean.
(6) In addition, the cleaning of furniture and carpets cost £571.05, new loft insulation cost £546.75, and two claims for a chimney sweep were £43 and £75 respectively.
(7) The refinery was working largely as usual, with steam pouring from vents on the complex of pipes, chimneys and girders which towers over the flatlands of the Humber estuary's south shore.
(8) The chimney-like features on the roofs are ventilators that help the houses to cool naturally.
(9) Up in the foothills of the Pyrenees, in a tiny village nestled amid breathtaking landscapes and eagles in flight, a man in a woolly hat pushes a wheelbarrow up a narrow street whistling to himself as the smell of woodsmoke drifts out of chimneys.
(10) This report documents survival of three consecutive patients treated by an adaptation of the Santulli "chimney" anastomosis.
(11) In about half the world's households, such fuels are used for cooking daily, usually without a flue or chimney and with poor ventilation.
(12) With chimney heights ranging from 12 to 36 mm and their inner diameters from 1 to 4 mm, greater than 70% of the resistance to evaporation is provided by the cover.
(13) The jury of nine men and three women at Maidstone crown court cleared the six, five of whom had scaled a 200m tall chimney at Kingsnorth power station at Hoo, Kent in October 2007.
(14) The refinery chimneys were spewing out 1.7 million tonnes of carbon dioxide into the air per year till 2011.
(15) It is characteristic in persons who already have livido reticularis and who expose themselves for several hours every day to the heat from chimneys or foot-warmers.
(16) Black smoke rising from the chapel's chimney signifies an inconclusive vote (traditionally damp straw was added to make the smoke black but a chemical compound is now used instead); white smoke – and the pealing of the basilica's bell to avoid any confusion about the colour of the smoke – means that a new pope has been elected.
(17) Accessible only on foot, the Needles section of the Canyonlands national park has pink and creamy turrets, chimneys, gullies, mysterious canyons and weird formations.
(18) The main area for improvement was the refinery at Rho where it was aimed to disperse gases at a higher level by raising the chimneys and to use fuel gas in those burners which were connected to lower chimneys.
(19) The power station will become a big Westfield with a shopping centre inside.” But Tincknell says the height of the new buildings will be capped at 60 metres, which means the brick colossus’s four white chimneys will be visible from afar.
(20) If you have a fireplace you don't use, fit either a cap over your chimney pot (best done by a professional) or an inflatable chimney balloon.