Heat pumps are becoming an increasingly popular choice for homeowners looking for an energy-efficient and eco-friendly way to heat their homes. But one of the most common questions people have before installing a heat pump is: how much space do I need?
Unlike traditional gas boilers, heat pumps require both an outdoor and indoor unit, meaning you’ll need to ensure you have adequate space for a successful installation. In this guide, we’ll explain the space requirements for different types of heat pumps and how to prepare your home for installation.
Outdoor Space Requirements for a Heat Pump
The outdoor unit of an air source heat pump is responsible for extracting heat from the air and transferring it into your home. It needs to be installed in a suitable location with good airflow to operate efficiently.
Key Considerations for Outdoor Space:
- Size of the unit – The typical outdoor unit is about the size of a standard washing machine, measuring roughly 1m x 1m x 0.5m.
- Placement – It needs to be positioned on a stable surface, such as a concrete base or a sturdy wall bracket.
- Clearance space – Most manufacturers recommend at least 30cm of clearance on the sides and 1 metre in front of the unit for optimal airflow.
- Noise levels – While heat pumps are relatively quiet, placing them away from bedroom windows or sensitive areas can minimise any potential disturbance.
Where Can You Install the Outdoor Unit?
- Garden or driveway – A clear, open space is ideal to ensure unrestricted airflow.
- Side of the house – Many homeowners opt to install the unit against an exterior wall for convenience.
- Mounted on a wall – If space is limited at ground level, some units can be installed on a wall bracket.
If you live in a property with limited outdoor space, speak to a professional heating engineer who can assess the best possible placement.
Indoor Space Requirements for a Heat Pump
The indoor unit of a heat pump works similarly to a conventional boiler, distributing heat through radiators or underfloor heating. The size and type of indoor components depend on the system you choose.
Types of Indoor Units:
- Standard indoor unit – Similar in size to a gas boiler and usually installed in an airing cupboard, utility room, or garage.
- Hot water cylinder – Many heat pump systems require a larger hot water cylinder, which can take up more space than a standard boiler tank. If you’re switching from a combi boiler, you may need to allocate space for this.
Minimum Space Requirements Indoors:
- The indoor unit typically measures 60cm x 60cm x 90cm.
- The hot water cylinder usually requires around 80cm x 80cm of floor space, plus some clearance for pipework.
- Adequate ventilation is needed to prevent overheating and ensure efficient operation.
If space is a concern, a professional installer can advise on compact solutions, such as integrating the unit into an existing storage cupboard or using a thermal store instead of a large cylinder.
Additional Factors That Affect Space Requirements
1. Pipework and Connections
Heat pumps require pipework to connect the outdoor and indoor units, as well as to distribute heat around your home. In most cases, these pipes can be routed discreetly along walls or under floors, but older homes with limited access points may need additional adjustments.
2. Radiators and Underfloor Heating
Heat pumps work best at lower temperatures compared to traditional gas boilers, meaning you may need larger radiators or underfloor heating to maximise efficiency. If you’re installing larger radiators, you should consider whether you have enough wall space available.
3. Planning Permissions and Property Restrictions
Most domestic heat pump installations fall under permitted development, meaning you won’t need planning permission. However, if you live in a listed building or conservation area, additional space and placement restrictions may apply. Always check with a professional installer to confirm regulations for your home.
Is Your Home Suitable for a Heat Pump?
Even if you have limited space, there are often solutions available to make a heat pump installation work for your home. At A N Heating Ltd, we provide expert advice on system selection, placement, and installation. Whether you’re in a spacious detached home or a compact urban property, we can help you find the best heating solution.
If you’re considering a Heat Pumps Installation Wiltshire, contact our team today for a consultation. We’ll assess your home, discuss your options, and provide a professional installation that maximises efficiency and comfort.
