A housing unit, or dwelling unit, (at later mention often abbreviated to unit) is a structure or the part of a structure or the space that is used as a home, residence, or sleeping place by one person or more people who maintain a common household.http://www.

Smoke-Free Multi-Unit Housing refers to a ban on smoking tobacco products in multiple‐unit or multi‐unit housing (MUH) complexes, which are defined as a public or private building, or portion thereof, containing two or more dwelling or other housing units including, but not limited to, a building with live/work units, apartment buildings, condominiums, senior citizen residences, nursing homes, housekeeping room/units, residential or single room occupancy hotels, and other multi-unit residential dwellings, group housing, or boarding facilities. According to recent estimates, within the United States, roughly 80 million (1 in 4) residents live in multi-unit housing complexes and more than 1 in 3 renters are exposed to secondhand smoke.

A containerized housing unit, usually abbreviated as CHU (and sometimes called containerized living unit or CLU) is an ISO shipping container pre-fabricated into a living quarters. Such containers can be transported by container ships, railroad cars, planes, and trucks that are capable of transporting intermodal freight transport cargo.