"Relevant field experience" means, with respect to oil heating, the trade-related functions of the installation and maintenance of piping systems, heating and air conditioning systems, appliances and appurtenances, and fuel oil burning equipment, or with respect to plumbing, the trade-related water distribution and drainage systems, and installations and maintenance of fixtures not otherwise required by the licensing functions of RSA 153:27 through RSA 153:38 and this chapter.
N.H. Admin. Code § Saf-Mec 301.06