No ventilation or air circulation can prevent this.
Cedar wood sauna toxic.
Never use synthetic wood in a sauna.
But in the case of cedar and hemlock and other softwoods the chemicals that produce the scent they give off can be to some people annoying or intolerable even dangerous.
All wildwood grilling cedar planks are made from western red cedar.
To most people naturally occurring wood phenols are harmless but people with particular sensitivities or people who are prone to allergies should avoid saunas made from cedar and other fragrant woods.
If you see other brands saying cedar is toxic or creates an allergic or asthmatic reaction the studies they are referring to are based on cedar wood dust not finished planks red cedar is also durable so it will last.
Best of all not only is it not prone to toxic off gassing it actually gives off a pleasant scent that can add to the relaxation aspect of the overall sauna experience.
Western red cedar is delicious and non toxic.
If what was being outgassed from wood into the air was harmless say like the smell of vanilla from a baking cake this wouldn t be a problem.
This is the safest and most recommended for cedar plank cooking.