Installation Footprint and Space Requirements
Gas boiler installations are generally more contained. A modern boiler is a wall-mounted unit, often fitting neatly into a kitchen cupboard, utility room, or loft. The primary requirement is a suitable flue path. For an air source heat pump, you're looking at a larger outdoor unit, similar to an air conditioning condenser, which needs unobstructed airflow. This unit typically sits on a concrete pad or wall brackets outside. Inside, a hot water cylinder is almost always required, replacing your existing cylinder or sometimes a combi boiler.
- Boiler: Wall-mounted, compact unit.
- Heat Pump: Large outdoor unit, plus indoor cylinder.
- Consider external aesthetics and noise for heat pump siting.

