VIT-Smooth uses a new and complex process of using a powdered enamel to coat the zero-carbon steel has been perfected. This is an environmentally friendly process with the powder being constantly recirculated. The old method generates highly toxic chemicals like hydrofluoric acid.
VIT-Smooth uses 1.2mm thick zero carbon steel, then coats of powdered enamel are added giving a total thickness of 1.4mm to 1.5mm. Most of our competitors use 1.0mm steel or even thinner, flue pipes from the appliance to the liner or chimney and must only be used in the same room as the appliance is installed.
Distances from exposed combustible materials must be three times the diameter of the flue, for example, a 125mm flue pipe should be a minimum of 375mm away from anything combustible, unless otherwise specified by the manufacturer.
In the current Document J the maximum horizontal length of flue pipe allowed from the back of an appliance into any chimney is 150mm.
It is important that there is easy access for cleaning, particularly at any change of direction in the flue, you can use a factory made Swept 90° Bend with cleaning point or a 90° Tee with Cap.