Product Efficiency - EVA Stampaggi ARIA 50 Bedienungshandbuch

03.5 PRODUCT EFFICIENCY

Highly efficient stoves may pose difficulties for fume extraction.
In order for a vent pipe to work properly its internal temperature must increase as a consequence of the fumes generated during combustion.
Importantly, the efficiency of a heater is determined by its ability to transfer most of the heat produced to the environment to be heated:
consequently, the greater the efficiency of the stove, the "colder" the residual fumes of combustion, and consequently, the lower the "draft".
A traditional chimney flue, with a rough design and insulation, is more efficient if used with a traditional open fireplace or a poor quality stove
where most of the heat is lost with the fumes.
Therefore, purchasing a quality stove often entails modifying the existing chimney flue to obtain better insulation, even when it already works
properly with old appliances.
If the appliance does not heat or smoke it is always due to a poor draft.
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A common mistake is to connect the appliance's pipe to an existing chimney, allowing it to also remain in use for the old system. In
this way two solid-fuel appliances share the same chimney flue, which is wrong and dangerous.
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If the two appliances are used simultaneously, the fume load might exceed the existing chimney flue capacity resulting in downdraught.
If only one appliance is used, the fume heat will facilitate draught but the cold air coming from the other appliance not in use will cool
down exhaust fume temperature again blocking the draught.
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Besides the problems described so far, if the two appliances are placed on different levels the communicating vessel principle might
be interfered with, causing combustion fumes to be drawn in an irregular and unforeseeable way.
03. PRODUCT INSTALLATION
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