New York Codes, Rules and Regulations
Title 10 - DEPARTMENT OF HEALTH
Chapter I - State Sanitary Code
Part 7 - TEMPORARY RESIDENCES, MASS GATHERINGS AND CHILDREN'S CAMPS
Subpart 7-2 - CHILDREN'S CAMPS
Section 7-2.15 - Heat, light and ventilation

(a) Windows, or skylights having a minimum total area within the casement of at least eight percent of the floor area, shall be maintained in all occupied rooms; natural ventilation shall be provided through openable windows or other exterior openings which are equal in area to four percent or more of the floor area. Artificial in lieu of natural lighting, and mechanical ventilation, may be provided in toilet rooms and assembly space.

(b) Camps occupied between October 1st and May 1st shall have at least one building with heating facilities for emergency use. Unvented fossil fuel-powered heaters are prohibited.