Effect of ventilation and loading rates in large chamber testing of formaldehyde emissions from composite panels

A series of 17 particleboard and medium-density fiberboard products were tested for formaldehyde emission in a large-scale test chamber at varied air ventilation and product loading levels. Data were used to support the Hoetjer equation and develop a number of relationships between ventilation, loading, ambient formaldehyde levels, and product emission rates. The Hoetjer equation adequately explains product responses under a wide range of exposure conditions, but each product required an equation specific to its responses in the tests. From these data, a graphical method was developed to allow reasonable estimates of emissions from any product at any reasonable exposure condition when emission at only one test condition is known.

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