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The major hotel chains provide their own guidelines on how to estimate the number of hotel guests. Usually, it is estimated from the number of rooms or room keys, for instance 1.8 persons per room (Accor 2007 ), or 1.75 persons per room key. The usual estimates for the number of persons per guestroom are shown in Table 1.3. In business hotels, typical occupancy factor is smaller than in resort and holiday hotels for leisure. The measured attendance of the hotels in Section 4.6 was about 80%. Usually, the elevator planning is made for full occupancy.

Table 1.3 Typical occupancy factors of hotel guests.

Usage	Occupancy range	Typical occupancy factor
Resort hotel	1.2 … 2 persons/guestroom	1.8 persons/guestroom
Business hotel	1.2 … 2 persons/guestroom	1.2 persons/guestroom
Serviced apartments	2 persons for the first bedroom + 1 person for each additional bedrooms	1.5 persons/bedroom

In some countries, buildings have tenants for serviced apartments where similar services are provided as in hotels. Otherwise, these types of tenants resemble more apartment and residential buildings where people can stay for long time periods. The population is estimated in the same way as in residential buildings and in hotels. Also the service personnel in these buildings should need their own, separate transportation devices.