ASHP Guide
Air source heat pump efficiency: what installers can control
Efficiency conversations go wrong when survey quality is weak and assumptions are hidden.
Big drivers of ASHP efficiency
- Emitter sizing aligned to room-level losses.
- Design flow temperatures based on actual building evidence.
- Clear identification of high-loss rooms and constraints.
- Accurate handoff into design and commissioning workflow.
Fast way to lose efficiency on paper
- Assuming envelope quality without documenting evidence.
- Carrying old radiator assumptions into new loads.
- Skipping the survey details that create callback loops.