Heat loss first
Insulation, draughts and ventilation affect the heat demand that the system must meet.
Heat pump guidance
Design questions matter before brand names.
Heat pump outcomes depend on heat loss, emitter sizing, flow temperature, hot water needs and controls. The right first step is understanding the design problem.
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Quick answer: a heat pump quote should be based on the home's heat loss and heating design, not simply on replacing a boiler with a similarly sized box. No performance or savings claim should be treated as universal.
Before quotes
The checks that make or break a heat pump project.
Radiators and flow temperature
Lower flow temperatures can improve efficiency, but the emitters must be sized for the rooms.
Living with the system
Heat pumps are controlled differently from many boiler systems. Comfort strategy should be explained upfront.
Comparison table
Heat pump quote questions.
| Area | Why it matters | Question to ask |
|---|---|---|
| Heat loss | Sets the load the system has to meet. | Can I see the room-by-room heat-loss calculation? |
| Emitters | Radiators or underfloor heating affect flow temperature. | Which emitters need changing and why? |
| Hot water | Cylinder sizing and location affect cost and practicality. | What hot water arrangement is being proposed? |
| Controls | Controls affect comfort and running costs. | How should the system be run day to day? |
Next-step route
Compare the next sensible heat pump step.
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Disclosure
SavingEnergy.com may earn affiliate or referral income if you choose to continue through an approved tracked partner route. SavingEnergy.com is not an installer, supplier, surveyor, finance adviser or quote-comparison company.
Heat loss, insulation, emitter sizing, hot water, controls, outdoor unit position and flow temperature.
No. Some homes may need emitter changes, but this depends on the design and room-by-room heat demand.