Can I sue my landlord since my son got pneumonia because he doesn’t provide heat in our apartment?

Your question requires an attorney consultation. It is not a simple question that can be answered on this type of forum. There are many factors that would need to be considered and evaluated. I strongly suggest that you contact an experienced landlord/tenant attorney for a face-to-face consultation and give him/her all of the facts surrounding your situation. He/she would then be in a better position to analyze your case and advise you of your options.

Yes. A landlord must provide basic amenities such as heat, water, hygienic conditions.