OSHA does not require employers to provide heat or air conditioning for work spaces. OSHA does recommend temperature control in the range of 68-76°F. The qualities of good indoor air quality (IAQ) should include comfortable temperature and humidity, adequate supply of fresh outdoor air and control of pollutants from inside and outside of the building. Employers are responsible for protecting workers from temperature extremes. For additional information on this subject, see frequently asked questions about indoor air quality.