What are the health concerns pertaining to foam-in-place?
In general, the reaction of the two chemicals will produce water vapor and carbon dioxide. There are trace amounts of catalysts given off and although very rare, some people are allergic to them. Symptoms are like having hay fever. Those individuals should not be assigned to the foam-in-place dispenser. There is a danger of foam splashing into eyes and safety glasses should be worn. No special venting is required but having the dispenser near an open outside door dissipates the water vapor.