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Equation 21:

Number of occupants = 0.92 × Nbr + 0.63

where:

Nbr = number of bedrooms

Sensible Load

Latent Load

Living Area

230

190

Bedroom Area

210

140

Common Laundry

250

200

Office

250

200

Workout Room

710

1090

Central Restroom

245

155

Sensible and latent gains shall be accounted for separately, and different loads shall be applied in different space types when possible (see Table 27). The occupant heat gains are based on ASHRAE recommendations (ASHRAE 2001a). The average hourly occupancy profile is shown in Figure 30, and an example set of detailed hourly occupancy curves is shown in Figure 31.

Table 27. Peak Sensible and Latent Heat Gain From Occupants (ASHRAE 2001a)

Multiple Zones

Internal Load (Btu/person/h)

Single Zone Sensible Load

Internal Load (Btu/person/h) 220

Latent Load

164

Occupancy Profile daily average - whole house

fraction of total people

1.0

0.8

0.6 0.4

0.2

0.0

1

3

5

7

9

11

13

15

17

19

21

23

Figure 30. Average hourly load profile from occupants for all day types and family types (16.5 h/day/person total)

46

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