Pest control and pest management firms are recognising the importance of mechanical ventilation as part of termite control.
Since the emergence of fan ventilation for sub-floor (basement) areas, it really is not just an option, it is a requirement. Pest control, pest management industry stresses the importance of effective cross-flow ventilation (adequate ventilation) in sub-floor areas, in line with the Termite Inspection Report, in accordance with AS 3660.
The other fact is that when one places an anemometer (a free spinning wind speed apparatus) against a wire mesh vent, the impeller will move clockwise for a time, then anti-clockwise. The conclusion is that wire mesh vents work omni-directionally with a push pull motion. When all vents are doing the same thing, turbulence is present and not cross-flow ventilation in sub-floor area. Natural ventilation is not effective enough, something more is required.
Therefore, if one a client asks the pest controller, what would the installation of passive vents do for him at around say $130.00 each (or what ever), and the pest controller were to install ten. What benefits would the client see? Would it create cross-flow ventilation? No. Would it aerate the client’s sub-floor adequately? Probably not. Yes, but is it better than what the client had? Yes, true, but by what percentage? Perhaps around 20-25 percent?
A lot of clients have had wire mesh vents installed, and the reason that the client was there was that wire mesh vents by themselves did not resolve the clients problem, cross-flow ventilation was not achieved and the client still has a problem. So, why does the client now have to invest twice for the same problem? The other factor that plays havoc in the city is that buildings are virtually on top of each other, so the building next door or the fence line is going to inhibit air flow through a wire mesh vent for it to work effectively.
Fan ventilation was convinced to be the effective way in removing moisture from sub-floor areas because when the world’s experienced ventilation consultant looks at a passive vent and cannot tell which way the air is travelling through it, however with fan-forced systems there is no guesswork. So, do not leave it to chance to ventilate clients’ underfloor area, get the big guns in and let it do the job and take control.
Once the systems are installed, it is only going to do one thing and that is it is going to extract the damp air out, which causes rotting timber flooring structures and flooring (dry rot), cupping of floors, unpleasant musty smells in the home, unhealthy environment in the living areas, which will affect the respiratory health of the occupants, high humidity in the sub-floor area, which can encourage termites sooner than later, health problems encountered due to the cleaning solutions in removing mould and mildew inside the living areas and so on. Fan ventilation will extract these unhealthy and unwanted nasties from sub-floor areas by effective sub-floor ventilation.
So if recommending passive vents only, yes it will deliver a marginal results, however why not get it right the first time, couple fan ventilation systems with wire mesh vents. It will do what is required, then cross-flow ventilation will be achieved, no ifs or buts.
Envirofan’s mechanical vent is a well thought out product is that it is the size of a brick or terracotta vent. Installation of mechanical ventilation systems does not alter the structural integrity of the building. By doing a retrofit (no building license required) to terracotta vents or installing in sub-walls, the user would replace it with a 12volt (low voltage) system the same size.
If the dwelling has raked out purps in the brick work, one would extract one brick and install the 12volt (low voltage) brick size system. The great news is that by incorporating these systems, there is no need of flexible ducting, so the air can move freely throughout the sub-floor area.
The uniqueness about the mechanical vent also is that it can be solar powered (no running costs), however if the user do choose to operate it on a 12volt power system, it will consume around $3-00 of power per year.
It is also quiet due to its brushless motors and is water resistant, and an Aussie owned product. With any of the Envirofan products, the user will not need an electrician (cost saving), as it is all low voltage (12v) and the user will not electrocute yourself.
I believe that mechanical ventilation systems are well priced also, considering it is a low capital investment toward the major investment (the building). Consider too what damage damp problems and termites can cause, which is not cheap.
With expertise in pest control and pest management, and having the right apparatus in sub-floor ventilating systems incorporated into termite prevention regime, this would be a winning combination in the prevention of sub-floor damp and humidity.