Vertical Balanced Flues

The Problem

Long, tall, unsightly and expensive metal chimneys attached to the outside of the building, or a multitude of flue pipes, cowls, grilles and ducts do nothing to enhance the appearance of commercial properties.

The Solution

The Monodraught Vertical Balanced-Flue system provides all the requirements for combustion air, ventilation and flueing in one, neat, composite unit, available in any size for single or modular boilers. Now recognised by British Standards as an approved method for boiler house ventilation, this attractive, but highly cost effective Balanced-Flue system provides the perfect answer for every Architect and Building Services Specifier.

How the Monodraught System Works

Previously it has always been necessary to take the flue of any conventional boiler to above the highest part of the roof level to avoid problems of downdraught. Conversely, a fan dilution system of mechanically assisted flue venting at low level is often required to overcome these problems of potential downdraught.

The Monodraught system, however, provides a natural draught Vertical Balanced-Flue system, which, by its very design, eliminates all possibility of downdraught without relying on any mechanical means for operation.

By taking air for combustions and ventilation through air intakes sited at the top of the system, passing down through ducts formed in the sides of the chimney system to an enclosed boiler room below, a balanced condition is created. The flue gases are contained in a highly insulted twin wall flue system passing through the centre of the Monodraught arrangement, usually rising directly from the boilers.

Any wind movement, no matter how slight, is encapsulated by the air intakes on the windward side of the chimney and this air is conveyed to the boiler house below. Any excess wind pressure is vented on the leeward side of the system, leaving the optimum operation of the appliance unaffected by wind turbulence.