Fire Sprinkler Week: Where in Your Home Do Fire Sprinklers Need to Be?
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In one- and two-family homes or townhouses, sprinklers should protect the main living and sleeping spaces.
You do not need to install sprinklers in garages, attics, crawl spaces, and other concealed spaces that are not normally occupied and do not contain fuel-fired appliances. For spaces that do contain fuel-fired appliances, a sprinkler should be installed to protect the appliance.
Many closets and pantries smaller than 24 square feet do not require fire sprinklers. And your bathroom only requires sprinklers if it is larger than 55 square feet.
For more information, take a look at the complete list of requirements and exceptions.