NLC Limited are suppliers of Natural Ventilation equipment to all types of buildings through out the United Kingdom, including schools, colleges, universities, retail units and industrial buildings. The NEW NLC Limited Roofavent roof terminal and wall boxes combined with solar shading and light tubes could provide your solution to an ideal working environment. Naturalvent is the process of supplying and removing air by means of purpose-provided aperture (such as openable windows, ventilators and shafts) and the natural forces of wind and temperature-difference pressures. For air to move into and out of a building, a pressure difference between the inside and outside of the building is required. The resistance to flow of air through the building will affect the actual air flow rate. In general, controlled natural ventilation and infiltration are driven by pressure difference across the building envelope. The pressure difference is caused by: wind (or wind effect); difference in air density due to temperature difference between indoor and outdoor air (stack or chimney effect); or combination of both wind and stack effects. NLC Limited's in house installation engineers are working throughout the United Kingdom and can offer a full design, manufacture and installation package to suite the modern designers needs.