"Appurtenance" means an accessory to a stationary structure coated at the site of installation, whether installed or detached, including but not limited to bathroom and kitchen fixtures, cabinets, catwalks and fire escapes, concrete forms, doors, elevators, fences, fixed ladders, hand railings, lampposts, partitions, pipes and piping systems, rain gutters and downspouts, stairways, window screens, and heating equipment, air conditioning equipment, and other fixed mechanical equipment or stationary tools.
N.H. Admin. Code § Env-A 4202.05