Split a total cooling or heating load across multiple units. Calculates unit sizing, N+1 / N+2 redundancy, and standby capacity. Generates a draft equipment schedule.
| Tag | Role | Capacity | % of Load | Notes |
|---|
| Strategy | Typical Application | Pros | Cons |
|---|---|---|---|
| None | Small systems, non-critical | Lowest first cost | No backup; single point of failure |
| N+1 | Commercial HVAC standard | Maintains full capacity with one unit down | One idle unit cost |
| N+2 | Mission critical, hospitals | Two units can fail | High capital cost; reduced part-load efficiency |
| N×2 (50/50) | Data centers, critical process | Either unit covers 100% load; no interruption | Each unit must be sized for full load |
This calculator handles one step. AIM Works runs the complete MEP design workflow — thermal load calculations, duct & pipe networks, equipment selection, code compliance, and an AI design assistant — in one tool.