Setting up a heat pump: the best location for environmental energy.

Heat pumps can generally be installed indoors (e.g., in a basement, utility room, or garage) or outdoors (e.g., in the garden, against a house wall, or even on a flat roof). The best location depends on the type of heat pump and the specific layout of your home. Some heat pumps (monoblock) have all components in one unit and can be placed entirely inside or outside, while others (split systems) have an indoor and an outdoor unit.

For outdoor units, key considerations include:

• Airflow: The unit needs ample, unobstructed space for proper air circulation. Avoid placing it in tight corners or too close to walls, fences, or dense vegetation that could block airflow.
• Noise: While modern heat pumps are much quieter, consider placing the unit away from bedrooms, living areas, and neighboring properties to minimize potential noise disturbance.
• Proximity to the building: Install the outdoor unit as close as possible to the point where the pipes enter the house to minimize heat loss in the lines.
• Foundation: A stable, level foundation (e.g., a concrete slab or reinforced base) is essential to support the unit's weight and reduce vibrations.
• Weather protection: While designed for outdoor use, some shelter from extreme elements (like heavy snow accumulation or direct, strong winds) can be beneficial.
• Drainage: Ensure the area allows for proper drainage of condensate, especially in colder climates where ice buildup can occur.

For indoor units, key factors include:

• Space: Ensure there's sufficient space for the unit itself, as well as for maintenance access.
• Ventilation: For indoor air-source heat pumps, adequate wall openings for air ducts are necessary for air intake and exhaust.
• Hot water cylinder: If a hot water cylinder is part of the system, it's typically placed indoors (e.g., airing cupboard, utility room) and ideally close to areas with high hot water demand (bathrooms, kitchen) to reduce pipe runs and heat loss.
• Structural integrity: The floor or mounting surface must be able to support the unit's weight.

Regulations vary by location (country, region, municipality). In many areas, there are specific minimum distance requirements from property boundaries and neighboring windows or living spaces due to potential noise emissions. Always check local building regulations and consult with your installer. Open communication with neighbors can also be beneficial.

The distance of your air-to-water heat pump from the house wall is critical. Too close and it hinders airflow, cutting efficiency and boosting energy use. We recommend 30 to 50 cm minimum.

This ensures free airflow, eases maintenance, and reduces noise. Avoid confined spots to prevent "thermal short circuits" where the unit re-ingests cold air, drastically cutting performance. Also, ensure the exhaust isn't against prevailing winds.

Place the heat pump close to the house to minimize heat loss in pipes, but always maintain required wall and pathway clearances.

For ground-level outdoor units, avoid flood-prone areas to prevent water damage. In regions with heavy snowfall, consider raising the unit on a platform to ensure it remains clear of snow accumulation and maintains proper airflow. For coastal or humid areas, placement away from salt and excessive moisture is advisable to minimize corrosion risks.

Vaillant heat pumps are extremely resilient and function even under severe climate conditions. Read more on heat pump quality.

For air source heat pumps, positioning on a south or southwest-facing side of the house can sometimes slightly enhance efficiency in colder climates by leveraging solar gains. However, ensuring unobstructed airflow is generally more critical than specific orientation.

In many countries, residential air source heat pumps often fall under "permitted development rights" and do not require planning permission, provided they meet certain criteria (e.g., size, noise levels, distance from boundaries). However, this can vary significantly, especially for larger systems, listed buildings, or properties in conservation areas. Always confirm with your local authority or installer.