Environmental

Massachusetts requires carbon monoxide detectors to be installed in residential units that have:

AGas appliances only
BFossil fuel burning equipment or an attached garage, or are multi-family buildings✓ Correct
CMore than 4 bedrooms
DBasements only

Explanation

Massachusetts law (M.G.L. c. 148 § 26F½) requires CO detectors in residences with fossil fuel-burning equipment (furnaces, stoves, water heaters) or attached garages, as well as multi-unit residential buildings.

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