J1V5 Internal Heat Loads

Internal heat loads refer to the amount of heat generated within a building or a specific space due to various internal sources. Table S45C3d provide assumptions for occupancy, lighting, cooking and appliances, which are then used against the applicable schedule.

Table S45C3d with internal heat loads for lighting, cooking, and appliances

Sole-occupancy unit area (excluding garage) (m2)	Occupancy (m2/person)	Daytime lighting power density (6:00 am to 6:00 pm) (W/m2)	Night-time lighting power density (6:00 pm to 6:00 am) (W/m2)	Cooking in kitchen zone only (W/m2 kitchen area)	Appliances (except oven) in whole sole-occupancy unit (W/m2)
≤ 100	41.2	4.0	4.0	36.2	4.38
> 100 to ≤ 125	44.3	4.0	4.0	34.7	3.52
> 125 to ≤ 150	47.8	4.0	4.0	28.9	2.99
> 150 to ≤ 175	51.7	4.0	4.0	24.8	2.60
> 175 to ≤ 200	55.8	4.0	4.0	25.3	2.26
> 200 to ≤ 225	60.0	4.0	4.0	22.5	2.02
> 225 to ≤ 250	64.4	4.0	4.0	20.2	1.84
> 250 to ≤ 275	68.9	4.0	4.0	18.4	1.68
> 275 to ≤ 300	73.3	4.0	4.0	16.9	1.55
> 300 to ≤ 325	77.5	4.0	4.0	15.6	1.44
> 325 to ≤ 350	81.6	4.0	4.0	14.5	1.34
> 350 to ≤ 375	85.4	4.0	4.0	13.5	1.26
> 375	89.0	4.0	4.0	12.7	1.19