I n the age of spiralling energy costs and issues concerning cutting green house gas emission, a consumer must consider the choice in sub floor ventilation systems whether to use a 12V system or a 240V system. As the term 12V implies, it is a low voltage sub floor ventilation system which would consume 80% less power and is 50% quieter than a 240V in-line system. The Envirofan quad fan systems at peak performance operate at 27dba, which makes it the one of the most quiet sub floor ventilation systems in the market place.
Envirofan sub floor ventilation system has the capabilities in sub floor ventilation right from its inception since the 1970s. The fact is that it would take two Envirofan quad fan systems to equal what a high volume domestic in-line fan system will do. Another consideration is that if a 240V in-line fan system is used to ventilate the sub floor area and this fails and if it was the same fate for the Envirofan quad system, there will be still one Envirofan quad fan system still working in reserve in ventilating the sub floor area whereas the ventilation properties of the 240V in-line sub floor system would cease until as such time the fan system is repaired or replaced. Most ventilation companies install ducting, branch take offs, dampers, starting collars, reducing collars and when finished looks like an octopus in the sub floor area. Envirofan low voltage sub floor ventilation system has none of this as the 12V system replaces certain terracotta vents that already exist around the home. When these are installed, the ventilation systems direct the air flow to these points freely.