MF MSHP Cost bug in BEopt, scope of impact?
It seems BEopt (v2.8) has an egregious bug in the reported costs for mini-splits in multifamily buildings. Unlike other measures such as water heaters or mechanical ventilation in which the fixed materials costs are multiplied by the number of housing units (like one might expect), the MSHP fixed cost is not scaled by the number of apartments in BEopt's calculated cost.
Does this only affect the options panel of the results screen, or does it affect the internals as well e.g; the costs used in optimization, or to determine AERC? (Looking at the initial costs in the export suggests this affects more than just the results screen)
This can be accounted for with custom measures where one pre-scales this cost, but it's not obvious one would need to, nor should it be necessary...
Clarifying Update: Three unit MF, 36 kBTU HP type A capacity. 3 × 1,100 Cost/unit labor + 36 × 56 Cost/kBTUh + 1 × 415 "fixed" cost material= 5,731, as shown at the top of the right pane. However, it should be 3 × 415 for a total of 6,561. Afterall, the heat pump for each apartment will need its own lineset, etc.
