05 / Archived service
Heat-pump systems
The archived site described heat pumps as systems that move available heat rather than creating it directly, with options for one room or an entire property.
Air-to-air heat pumps
The original guide described an outdoor unit extracting heat from ambient air and an indoor unit distributing it through the building.
- Heating in winter and cooling in summer
- Filtered recirculated air
- Individual room controls
- Indoor and outdoor units
Air-to-water heat pumps
Air-to-water systems were described as applying extracted energy to water for central heating or domestic hot-water use.
Archive accuracy note
Efficiency, warranty and planning statements on the former site reflected products and rules at the time. They should not be treated as current technical or planning advice.