Hydronic/Steam Heating Coils

90.1-2016 BM

Systems with boilers have heating coils, including baseline building systems 1, 5 and 7.

Heating Coil Capacity


All systems with a hydronic heating coil


The heating capacity of a heating coil at ARI conditions



Input Restrictions

As designed. Adjust the capacity if the number of unmet load hours exceeds 300.

Baseline Rules

Autosize with a heating oversizing factor of 25%. If the number of unmet load hours for the baseline exceeds 300, increase the heating coil capacity as described in Chapter 2.