The 2021 edition of NFPA 225, Model Manufactured Home Installation Standard, presents the latest requirements for safer, more efficient, and more effective installation of manufactured homes. The 2021 edition of NFPA 225 does more to help ensure that installers are able to do their jobs effectively. Details on smoke alarms, CO detectors, and fire sprinkler systems are thoroughly outlined in NFPA 225. Changes for the 2021 edition include: A revision in scope that widens the use of the document to international reach A new definition of dwelling unit, to correlate with NFPA 101®, Life Safety Code® A new section on interior finish requirements from NFPA 286, Standard Methods of Fire Tests for Evaluating Contribution of Wall and Ceiling Interior Finish to Room Fire Growth Removal of the requirement for water mist systems Updates to referenced publications and NFPA extracts Use NFPA 225 to help protect people in manufactured homes from potentially deadly hazards. From site preparation through final inspection, the 2021 edition of NFPA 225 gives engineers, manufacturers, and AHJs the information they need to comply with the safety and health requirements for the installation of manufactured homes.