Trickle ventilators have been a part of the building industry in European countries for over twenty years. Introduced in Scandinavia in the early 1970s to attack the concern of indoor air quality and condensation forming on the glass and frames of windows, references to trickle ventilators are now contained in the Building Regulations of the Department of the Environment in the United Kingdom. They are accepted as a supplemental means of natural ventilation as well as an addition to mechanical ventilation such as furnaces, air conditioners, and various types of fans. Both Washington State and Oregon reference the use of trickle ventilators in their Ventilation and Indoor Air Quality codes. Other states are also either considering or have adopted codes similar to Washington and Oregon. |
