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.
Cedar wood sauna toxic.
Native to the pacific northwest and the original cedar wood used in traditional native american cooking.
Composite woods are made of a mixture of wood fibers plastics glues and other binding agents.
This is the safest and most recommended for cedar plank cooking.
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.
However some may be sensitive to the cedar odors.
Western red cedar is delicious and non toxic.
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.
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.
No ventilation or air circulation can prevent this.