Lara - what is your current ventilation setup? Most ventilation problems can be traced to a couple of key issues:
1) Not enough CFM (cubic feet per minute) exhausted outside - yes, some folks think that a recycling kitchen fan (one that does not have ducting) is safe (after all, you use them in a kitchen, right?).
2) Not enough fresh air - the fresh air system MUST be able to provide the same amount of air that is being exhausted, and it is usually a good idea that it is actually capable of providing MORE.
3) Exhaust duct located too close to fresh air intake - must be a minimum of 10 feet apart
4) Use of non-standard ducting materials or poor design of the ventilation/ducting system - you can have a high CFM fan, but if the duct design is faulty or the material are 'non-standard', you are NOT moving the amount of air that the fan is capable of.
These are the major issues that are usually found with most non-functional exhaust systems.
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Chaotic Glass: Safety for the glassworker, and random thoughts and opinions on the state of the glassworking world
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