See it in motion right here in this shorter online video. Don't just does The sleek inside offers much less turbulence, but additionally increases the draft. The smooth interior liner permits twenty% additional BTU capability for fuel appliances and 15% increased GPH (Gallons For every Hour) firing amount for oil appliances.From online video tutori

Old unlined chimneys are frequently chilly, due to the fact they absence insulation. This makes it harder for the recent smoke to rise, so it'll often condense in advance of it reaches the highest of flue. This can result in h2o vapour forming – which may result in damp – coupled with heavier smoke staying made.G - Length to combustible materia