Area - online utility on ToolBox.
Key formulas: 1+max(0,(p.height-2.8)÷0.1)×0.03; cooling÷2500
| Item | Formula / Note | Source / Standard |
|---|---|---|
| Cooling capacity estimate | Q = area × unit load (120–150 W/m²); west-facing or top floor +10%–20% | GB 50736-2012 Design Code for Building HVAC |
| HP conversion | 1 hp ≈ 2500 W; 1.5 hp ≈ 3500 W; 2 hp ≈ 5000 W cooling | GB/T 7725-2022 Room Air Conditioners |
| People & equipment load | Seated person ≈100–120 W sensible; electronics at 80% of rating | ASHRAE fundamental load data |
| Height & orientation factors | Above 3 m correct by volume (× height/2.8); top floor west-facing +10% | Empirical load corrections |
根据房间面积、使用类型、层高与窗户朝向,综合估算所需制冷量并推荐合适的空调匹数,避免“小马拉大车”或“大马拉小车”。