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Monodraught have always maintained that the balanced-flue condition created by the system ensures higher efficiency from the appliance and by reducing the level of emissions of unburnt hydro-carbons and other preventable pollutants, airborne pollution can be reduced.
The most important aspect relating to terminal location is to ensure that the products of combustion cannot re-enter the building through any window or openings in such concentrations as could be prejudicial to health. Since, however, the Monodraught maintains a balanced-flue condition, the system is unaffected by "building effects". A balance-flue condition will always ensure optimum performance from the appliance regardless of external wind conditions.
In July 1993 a document was published by Her Majesty's Inspector of Pollution entitled "D1" which related to the control of polluting emissions mainly from process plant and other combustion processes, other than boilers serving space heating and hot water generation. The indications of this legislation is that the emissions from gas-fired plant is not considered a serious pollutant, but nevertheless, Monodraught still recommend the heights and distances to window openings as set out on the attached tables which is still based on the original, memorandum requirements.
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