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Heat requirements
If your lease requires the landlord to provide heat, the landlord must give you the amount of heat required by the state codes and the local town or city ordinance. Under the state housing codes, from October 1 to May 1, the landlord must provide enough heat so that the temperature in the apartment is at least 68 degrees from 6 a.m. to 11 p.m. Between the hours of 11 p.m. and 6 a.m., the temperature in the apartment must be at least 65 degrees. Cite: N.J.A.C. 5:10-14 et seq. and N.J.A.C. 5:28-1.12(m). Local health codes cover parts of the year not covered by housing codes.

The housing inspector or board of health in your town enforces the heat requirements in the state and local codes. Larger cities have special no-heat hotlines that are set up especially to handle complaints. The inspector can file a complaint in court on your behalf, or you can file your own complaint. The landlord must then appear in court and explain why he or she is not providing heat. The court can impose stiff penalties, including fines or jail sentences.