Heat Pump Installation: What to Expect

Getting a heat pump installed through the Warm Homes Plan is straightforward. This guide explains the process from survey to completion so you know exactly what to expect.

Heat pumps are efficient heating systems that can cut your energy bills significantly. They work by extracting heat from outside air or ground and transferring it indoors.

Types of heat pumps available

The scheme offers two main types of heat pump depending on your property.

Air source heat pumps

Air source heat pumps are the most common option. They extract heat from outdoor air even in cold weather. A unit sits outside your home, similar in size to an air conditioning unit.

These are suitable for most properties. They work efficiently down to -15°C outdoor temperature.

Installation is usually completed in 2-3 days. They require less disruption than ground source pumps.

Ground source heat pumps

Ground source heat pumps extract heat from the ground using buried pipes. They are more expensive to install but slightly more efficient.

These require sufficient outdoor space for the ground loop. Your property needs a garden or land area for the pipework.

Installation takes longer, usually 5-7 days. Ground works are needed to bury the pipes.

The installation timeline

The process from application to completed installation typically takes 8-12 weeks. This includes surveys, planning, and the installation itself.

Initial survey

After your application is approved, a surveyor visits your home. They assess which heat pump type suits your property.

The survey checks your current heating system, insulation levels, and space for equipment. It takes 1-2 hours.

The surveyor explains their recommendations and answers your questions. You receive a written report within a week.

Design and planning

Installers design a system tailored to your home. This includes sizing the heat pump correctly and planning radiator upgrades if needed.

You approve the design before work begins. Changes to radiators or pipework are explained clearly.

Planning permission is rarely needed for air source heat pumps. Your installer handles any required notifications to the local authority.

Installation day

Professional installers complete the work in 2-7 days depending on system type. They aim to minimize disruption to your household.

You need to be home during installation for access and questions. Installers explain each stage as they work.

What happens during installation

The installation process varies by pump type but follows a standard sequence.

Removing old equipment

If you have an old boiler, it is removed and disposed of safely. Oil tanks are drained if you have oil heating.

Your home may be without heating for 1-2 days during the changeover. Plan this for warmer weather if possible.

Installing the heat pump

The outdoor unit is positioned on a solid base. This is usually a concrete pad or wall brackets.

Indoor equipment includes a hot water cylinder if you don't have one. Pipework connects the outdoor and indoor components.

Upgrading radiators

Many homes need larger radiators for heat pumps to work efficiently. Heat pumps operate at lower temperatures than gas boilers.

New radiators are fitted where needed. This maintains comfort while maximizing efficiency.

Learn about insulation improvements that work alongside heat pumps.

System commissioning

Installers test the system thoroughly before leaving. They set up controls and ensure everything works correctly.

You receive training on using the system. This covers temperature controls, hot water settings, and basic maintenance.

After installation support

Your installation includes a warranty covering parts and labor. This is typically 5-7 years for the heat pump itself.

Installers return after a few weeks to check the system is performing well. They make adjustments if needed.

Annual servicing maintains efficiency and warranty validity. The first service is usually included in your package.

Combining with other upgrades

Heat pumps work best in well-insulated homes. The scheme often includes insulation alongside your heat pump.

Some properties qualify for solar panels at the same time. This reduces running costs further by generating free electricity.