N.H. Rev. Stat. Ann. § 461-B:12

An appeal under this chapter may be taken to the superior court by the minor, parent, guardian, or custodian, within 30 days of the final dispositional order, but an appeal shall not suspend the order or decision of the court unless the court so orders. The superior court shall hear the matter de novo, and shall give an appeal under this chapter priority on the court calendar.