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 Wyoming, state statutes require landlords to install and maintain smoke detectors in leased residential premises. These regulations are in place to ensure the safety and well-being of tenants by providing early warning in the event of a fire. While Wyoming law mandates the presence of smoke detectors, it does not specify the requirement for photoelectric or ionization sensors as some other states do. Regarding carbon monoxide detectors, Wyoming also has laws that require the installation and maintenance of these devices in residential rental properties. This is to protect occupants from the dangers of carbon monoxide poisoning, which can occur due to faulty or improperly vented appliances. Landlords are responsible for ensuring that both smoke and carbon monoxide detectors are in working order and comply with the applicable safety standards.