Heat pump retrofit examples

These examples are illustrative retrofit scenarios designed to show how heat-pump projects differ by property type. They are not endorsements or paid submissions.

1. Victorian terrace in London

  • Property: older mid-terrace with solid walls and limited external space.
  • Key issues: higher heat loss, tighter siting constraints, and likely radiator upgrades.
  • Typical route: loft-insulation improvement, room-by-room heat-loss review, emitter upgrades, then an air source heat pump.
  • Why it matters: older homes can still be viable when expectations are realistic and the system is designed properly.

2. 1970s semi in Manchester

  • Property: cavity-wall semi-detached house with an easier retrofit path than many older homes.
  • Key issues: balancing upfront cost against long-term efficiency.
  • Typical route: improve fabric first, size the heat pump to actual demand, then review tariffs and controls.
  • Why it matters: modest fabric upgrades can reduce the required system size and improve running costs.

3. Rural detached home off the gas grid

  • Property: larger detached house where oil or LPG may already be expensive.
  • Key issues: high heat demand, siting, and the value of careful design.
  • Typical route: insulation review, emitter assessment, and a closer look at whether air source or ground source makes more sense.
  • Why it matters: off-gas properties often have stronger economics for low-carbon heating than homes on cheap mains gas.

What to take from these examples

  • The best heat-pump project usually starts with heat demand, not with the size of the old boiler.
  • Fabric improvements, controls, and emitter design matter as much as the outdoor unit itself.
  • Installation quality and commissioning can make a major difference to comfort and bills.

Written by NetZeroNow Editorial Team | Last updated on 2026-03-30