Legislated detector requirements
In North America, some national, state and local municipalities require installation of CO detectors in new and existing homes as well as commercial businesses, among them Illinois, Massachusetts, Minnesota, New Jersey, Vermont and New York City as well as the Canadian province of Ontario. Installers are encouraged to check with their local municipality to determine what specific requirements have been enacted in their jurisdiction."
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contact the borough construction department for the exact location they want you to place the unit(s). As far as my experience goes, they will want it not near the heater but near the sleeping areas.
My advice - follow them to the letter - generally there is a fee and if you fail, you pay it again - so it costs you extra time and money if you fail the inspection - which is super annoying as you head to the finish line of your sale.
Sounds like you've succeeded in selling your home - Congrats and good luck with your closing.
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