Heat Pump Technologies Comparison

graph TB subgraph "Heat Pump Technologies Comparison" A[Heat Pump Technologies] B[Ground Source Heat Pumps] C[Air Source Heat Pumps] B1[Advantages] B2[Challenges] C1[Advantages] C2[Challenges] B1a[Higher efficiency/COP] B1b[Stable performance year-round] B1c[Longer lifespan] B2a[Higher installation cost] B2b[Requires suitable geology] B2c[Space for boreholes/trenches] C1a[Lower installation cost] C1b[Easier installation] C1c[No geological constraints] C2a[Lower efficiency in cold weather] C2b[Visual impact and noise] C2c[Shorter lifespan] A --> B A --> C B --> B1 B --> B2 C --> C1 C --> C2 B1 --> B1a B1 --> B1b B1 --> B1c B2 --> B2a B2 --> B2b B2 --> B2c C1 --> C1a C1 --> C1b C1 --> C1c C2 --> C2a C2 --> C2b C2 --> C2c end classDef level1 fill:#e1f3d8,stroke:#333,stroke-width:1px; classDef level2 fill:#d0e8ff,stroke:#333,stroke-width:1px; classDef level3 fill:#ffe6cc,stroke:#333,stroke-width:1px; classDef level4 fill:#f9d1d1,stroke:#333,stroke-width:1px; class A level1; class B,C level2; class B1,B2,C1,C2 level3; class B1a,B1b,B1c,B2a,B2b,B2c,C1a,C1b,C1c,C2a,C2b,C2c level4;