General Landlording & Rental Properties9yFollowWhat fire alert system required for 4 family in NJ Hudson county?David SmithRental Property Investor · NJ/PA · Member since 2016 · 555 posts · 149 votesNOW the 4-family building is using magnum fire alert 6000 I donot have the key to the box; it is making some bit of noise.. Called Magnum; they say it is an old model. What is a new good model to install? Cost? Any Good company can do the job? Hudson county! Went to city hall; will need a permit.0Reply10 views