N.H. Rev. Stat. Ann. § 540: § 540:1-a

In this chapter:
I. "Nonrestricted property" means all real property rented for nonresidential purposes and the following real property rented for residential purposes:
(a) Single-family houses, if the owner of such a house does not own more than 3 single-family houses at any one time.
(b) Rental units in an owner-occupied building containing a total of 4 dwelling units or fewer.
(c) [Repealed.]
(d) Single-family houses acquired by banks or other mortgagees through foreclosure.
II. "Restricted property" means all real property rented for residential purposes, except those properties listed in paragraph I.
III. "Rental unit" means a suite of one or more rooms located within a single building rented by the owner to one or more individuals living in common for nontransient residential purposes.
IV. The term "tenant" or "tenancy" shall not include occupants or occupancy in the following places and the provisions of this chapter shall not apply to:
(a) Rooms in rooming or boarding houses which are rented to transient guests for fewer than 90 consecutive days. For purposes of this subparagraph, if the owner of the facility directs the occupant to move from one room to another in the same rooming or boarding house, or directs the occupant to move from one of the owner's rooming or boarding houses to another, the 90-day period for computing consecutive days of occupancy shall not be broken. Consecutive days of occupancy shall not include a voluntary move from one room to another if the move was made at the request of the occupant after the occupant has been notified of the exemption from tenancy under this subparagraph. Such request shall be in writing and shall include the following statement:
"I request a move from ________________ to _______________ . I have received a copy of RSA 540:1-a, IV(a) and understand that any time I spent in the first room shall not apply toward the 90 consecutive days of occupancy required for tenancy under RSA 540."
(b) Rooms in hotels, motels, inns, tourist homes and other dwellings rented for recreational or vacation use.
(c) Rooms in student dormitories, nursing homes, hospitals and any other facilities licensed under RSA 151 or certified under RSA 126-A, convents, monasteries, asylums, or group homes.
(d) A single-family home in which the occupant has no lease, which is the primary and usual residence of the owner.
(e) Residential real estate under RSA 540-B.
(f) Vacation or recreational rental units under RSA 540-C.
(g) Residential units leased by a member of a fraternal or social organization that provides student housing for a postsecondary institution in a structure owned and operated by the fraternal or social organization.
(h) Occupancies in which the occupant is hired to provide care or assistance for a person with disabilities. In such cases, if the person with disabilities or his or her legal guardian no longer wishes the assistance of the caregiver, he or she may order the caregiver to vacate the premises without legal process required as a tenant under this chapter, provided:
(1) There is a written agreement specifying that care or assistance authorizes summary ejection of the caregiver; and
(2) The caregiver is given written notice directing him or her to vacate the premises in not less than 72 hours; and
(3) If the agreement between the parties provides for compensation for the care provider beyond free housing, prior to the time the caregiver vacates the premises, the person with disabilities or the legal guardian pays the caregiver any money due under the agreement for services rendered.