Specification 44 Calculation of heating load limit, cooling load limit and thermal energy load limit
S44C1
Scope
New for 2022
Archive Number
State variations
S44C2
Heating load limit
New for 2022
The heating load limit of a space, measured in MJ/m2.annum, is equal to the greater of—
- 4; and
-
, where—
-
= the total annual heating degree hours of the building location; and
-
= the area adjustment factor for the heating load limit, determined in accordance with Table S44C2.
Table S44C2 Area adjustment factors for the heating load limit
Total area of habitable rooms (AH) |
Area adjustment factor (FH) |
≤ 50 m2 |
1.37 |
> 50 m2 to ≤ 350 m2 |
|
> 350 m2 |
0.84 |
Archive Number
State variations
S44C3
Cooling load limit
New for 2022
(1) The cooling load limit of a space, measured in MJ/m2.annum, is calculated in accordance with the following formula:
(2) In the formula at (1)—
-
= the cooling load limit (MJ/m2.annum); and
-
= the total annual cooling degree hours of the building location; and
-
= the total annual dehumidification gram hours of the building location; and
-
= the area adjustment factor for the cooling load limit, determined in accordance with Table S44C3.
Table S44C3 Area adjustment factors for the cooling load limit
Total area of the habitable rooms (AH) |
Area adjustment factor (FC) |
≤ 50 m2 |
1.34 |
> 50 m2 and ≤ 200 m2 |
|
> 200 m2 and ≤ 1000 m2 |
|
> 1000 m2 |
0.71 |
Archive Number
State variations
S44C4
Thermal energy load limit
New for 2022
(1) The thermal energy load limit of a space, measured in MJ/m2.annum, is calculated in accordance with the following formula:
(2) In the formula at (1)—
-
= the thermal energy load limit; and
-
= the heating load limit; and
-
= the cooling load limit; and
-
= the annual average daily outdoor temperature range.
Archive Number
State variations