All states have laws (statutes) that require landlords to install and maintain smoke detectors in leased residential premises (apartments, homes).

Some states such as Iowa, Maine, Massachusetts, Ohio, and Vermont require photoelectric or ionization sensors—at least in new construction. And Oregon requires smoke detectors with a HUSH mechanism that allows the alarm to be silenced or temporarily desensitized for 7 minutes while a known condition such as cooking is causing the alarm to activate.

Most states also require landlords to install and maintain carbon monoxide detectors in leased residential premises. Smoke and carbon monoxide detectors are widely available in the same device.

In Nevada, state statutes require landlords to install and maintain smoke detectors in leased residential premises. Nevada law mandates that smoke detectors be installed in accordance with the manufacturer's instructions and in compliance with the applicable building codes. These devices must be placed in each sleeping room and in the vicinity of the bedrooms. Additionally, Nevada law requires the installation and maintenance of carbon monoxide detectors in residential units that contain a fuel-burning appliance, fireplace, or an attached garage. The combination smoke and carbon monoxide detectors that are mentioned are indeed available and can be used to satisfy both requirements if they meet the necessary standards and are installed as per the manufacturer's guidelines and building codes.