10 C.F.R. § 434.512
Internal loads.
Cite as 10 C.F.R. § 434.512 (2026)
512.1 The systems and types of energy specified in this section are provided only for purposes of calculating the Energy Cost Budget. They are not requirements for either systems or the type of energy to be used in the Proposed Design or for calculation of Design Energy Cost.
512.2 Internal loads for multi-family high-rise residential buildings are prescribed in Tables 512.2.a and b, Multi-Family High Rise Residential Building Schedules. Internal loads for other building types shall be modeled as noted in this subsection.
Table 512.2.
a
—Multi-Family High Rise Residential Buildings Schedules—One-Zone Dwelling Unit
[Internal loads per dwelling unit Btu/h]
Hour
Occupants
Lights
Equipment
Sensible
Latent
Sensible
Sensible
Latent
1
300
260
0
750
110
2
300
260
0
750
110
3
300
260
0
750
110
4
300
260
0
750
110
5
300
260
0
750
110
6
300
260
0
750
110
7
300
260
0
750
110
8
210
260
980
1250
190
9
100
80
840
2600
420
10
100
80
0
1170
180
11
100
80
0
1270
190
12
100
80
0
2210
330
13
100
80
0
2210
330
14
100
80
0
1270
190
15
100
80
0
1270
190
16
100
80
0
1270
190
17
100
80
0
1270
190
18
300
260
0
3040
450
19
300
260
0
3360
500
20
300
260
960
1490
220
21
300
260
960
1490
220
22
300
260
960
1490
220
23
300
260
960
1060
160
24
300
260
960
1060
160
Table 512.2.
b
—Multi-Family High Rise Residential Building Schedules-Two-Zone Dwelling Unit
[Internal loads per dwelling unit Btu/h]
Hour
Bedrooms & bathrooms
Other rooms
Occupants
Lights
Equipment
Occupants
Lights
Equipment
Sensible
Latent
Sensible
Sensible
Latent
Sensible
Latent
Sensible
Sensible
Latent
1
300
260
0
750
110
2
300
260
0
750
110
3
300
260
0
750
110
4
300
260
0
750
110
5
300
260
0
750
110
6
300
260
0
750
110
7
300
260
0
750
110
8
210
260
980
1250
190
9
100
80
840
2600
420
10
100
80
0
1170
180
11
100
80
0
1270
190
12
100
80
0
2210
330
13
100
80
0
2210
330
14
100
80
0
1270
190
15
100
80
0
1270
190
16
100
80
0
1270
190
17
100
80
0
1270
190
18
300
260
0
3040
450
19
300
260
0
3360
500
20
300
260
960
1490
220
21
300
260
960
1490
220
22
300
260
960
1490
220
23
300
260
960
1060
160
24
300
260
960
1060
160
Table 512.2.
b
—Multi-Family High Rise Residential Building Schedules-Two-Zone Dwelling Unit
[Internal loads per dwelling unit Btu/h]
Hour
Bedrooms & bathrooms
Other rooms
Occupants
Lights
Equipment
Occupants
Lights
Equipment
Sensible
Latent
Sensible
Sensible
Latent
Sensible
Latent
Sensible
Sensible
Latent
1
300
260
0
100
20
0
0
0
650
90
2
300
260
0
100
20
0
0
0
650
90
3
300
260
0
100
20
0
0
0
650
90
4
300
260
0
100
20
0
0
0
650
90
5
300
260
0
100
20
0
0
0
650
90
6
300
260
0
100
20
0
0
0
650
90
7
200
180
680
200
40
100
80
300
1050
150
8
110
120
240
200
40
100
80
600
2400
380
9
0
0
0
100
20
100
80
0
1070
160
0
0
0
0
100
20
100
80
0
1170
170
0
0
0
0
100
20
100
80
0
1170
170
0
0
0
0
100
20
100
80
0
2110
310
0
0
0
0
100
20
100
80
0
2110
310
14
0
0
0
100
20
100
80
0
1170
170
15
0
0
0
100
20
100
80
0
1170
170
16
0
0
0
100
20
100
80
0
1170
170
17
0
0
0
100
20
100
80
0
1170
170
18
0
0
0
100
20
300
260
0
2940
430
19
0
0
0
100
20
300
260
0
3260
480
20
100
80
320
300
60
200
180
640
1190
160
21
100
80
320
300
60
200
180
640
1190
160
22
150
130
480
700
90
150
130
480
790
130
23
300
260
640
410
70
0
0
320
650
90
24
300
260
640
410
70
0
0
320
650
90