It is illegal to purposely vent any refrigerant. All refrigerant users must possess an EPA 608 certification and are required by law under The Clean Air Act to recover all refrigerants. Recovered refrigerants are to be recycled or returned to an EPA registered reclaim service provider (go to www.refri-claim.com). The law does allow equipment owners to recycle and reuse refrigerants in their own equipment without processing it through a reclaim company. However, this practice adds additional costs in the form of equipment, labor and energy, and, if done improperly, can create additional service problems and even equipment failures.