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When a house has two or more HVAC systems, it also has two or more thermostats. How do I account for that in Optimiser? I often see one new system with a programmable thermostat and an older system with a non-programmable one. Suggestions? Thanks.
OptiMiser is limited to single zone modeling. You have two options for dealing with this.
1. You can model the zones as though they are separate units of a multi-unit building. This requires using multiple project files. The Multi-Family controls allow you to remove the boundary between the two zones from the thermal boundary.
2. You can calculate weighted averages for the thermostat set-points, using the % Load for each system as the weighting. In you case this would still specify a setback thermostat, but the setback would be reduced.
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