90.1-2019 Building descriptors will be added to define how ground-source heat pumps can be modeled for the proposed design. Ground source heat pumps are not applicable to the baseline building system. Book traversal links for 3.7.5.8 Ground-Source Heat Pumps ‹ 3.7.5.7 Chilled Beams Up 3.7.5.9 Variable Refrigerant Flow ›