Purchased Heat
For systems using purchased hot water or steam, the heating source shall be modeled as purchased hot water or steam in both the proposed and baseline building designs. Hot water or steam costs shall be based on actual utility rates, and on-site boilers, electric heat, and furnaces shall not be modeled in the baseline building design.
Purchased Chilled Water
For systems using purchased chilled water, the cooling source shall be modeled as purchased chilled water in both the proposed and baseline building designs. Purchased chilled water costs shall be based on actual utility rates, and on-site chillers and DX equipment shall not be modeled in the baseline building design.
Baseline system requirements for proposed designs using purchased heat or chilled water for heating or cooling are mentioned in Table 8. Modeling requirements for on-site distribution pumps are documented in Section 3.8.5.
Table 8. Baseline Requirements for Purchased Heat and Purchased Chilled Water Systems
|
Proposed |
Baseline System |
|
|
Heating |
Cooling |
|
|
Purchased heat |
Chiller or DX |
The baseline heating and cooling source shall be based on the applicable cooling system as determined by Table 3 and Table 4. |
|
Boiler/electric resistance or gas furnace |
Purchased chilled water |
Table 3 and Table 4 shall be used to select the baseline HVAC system type, with the following modifications:
|
|
Purchased heat |
Purchased chilled water |
Table 3 and Table 4 shall be used to determine the baseline HVAC system type, with the following modifications:
|