Section 164.051 - Heating(A) Each building shall be equipped with a heating system that is sufficient to maintain a minimum temperature of 68ºF throughout the building during cold weather. Portable heaters are prohibited.(B) The heating system shall comply with the rules and regulations as outlined by the Department of Public Safety (522 CMR: Board of Boiler Rules, and 527 CMR: Board of Fire Prevention Regulations) under M.G.L. c. 148. (C) Plumbing and heating shall be adequate to maintain a comfortable and healthy environment for clients. Hot water supplied to fixtures accessible to clients shall be regulated to ensure a minimum temperature of 110ºF and a maximum temperature of 130°F.Amended by Mass Register Issue 1305, eff. 1/29/2016.