Heat pumps: what to expect on installation day

If you’re considering installing a heat pump in your home or business, you'll be on your way to a smarter, more sustainable, and more comfortable environment. 

But before booking installation, it's important to understand what's involved so you can prepare effectively. This guide will walk you through the process, with specific advice for both residential and commercial spaces. 

Heat pump Installation for residential properties 

What to consider before fitting a heat pump 

To prepare for the purchase and installation of a heat pump, you will need to make some key considerations. Thinking about these points beforehand will help you avoid any surprises and ensure your new system runs at its best. 

Home suitability 

Heat pumps can be installed in most homes. However, different heat pumps are better suited for different circumstances, so choosing the right technology to meet specific needs is important. Be sure to research the various heat pump types available (air source and ground source). 

Space requirements 

You'll need space for both the outdoor unit and, potentially, a hot water cylinder inside your home. The outdoor unit can be about 1 metre tall and 1 metre wide (roughly two wheelie bins). 

Strong insulation 

While extensive insulation isn't mandatory, it’s highly recommended. Heat pumps perform at their best in well-insulated homes. Improving your home's insulation reduces heat loss, keeps your home warm for longer, and allows the heat pump to work more efficiently, lowering heating costs. 

Suitable radiators 

Heat pumps typically send hot water to radiators at a lower temperature than traditional systems. The lower the temperature, the more efficient the system and, ultimately, the lower the cost to run. If you have existing double-finned radiators, you can get the best from your heat pump, but older radiators may need to be replaced. Alternatively, underfloor heating systems can be a suitable option as they work efficiently with heat pumps' lower-temperature outputs. 

Proper piping 

Most homes won't require changes to existing pipework. However, if you have microbore pipes, your installer might recommend flushing out the system and carefully adjusting the flow rate accordingly. 

Energy Performance Certificate (EPC) 

To apply for a heat pump grant, such as the Boiler Upgrade Scheme, you'll likely need an EPC. This certificate measures your property's energy efficiency and indicates how well a heat pump will perform. If you need a new energy performance certificate in the UK, you can find an accredited assessor on the government website. 

Professional installation 

It's not advisable to attempt a DIY installation due to the risk of injury, potential damage to the unit, and possible financial repercussions, such as voiding the warranty or ineligibility for grants. Also, a DIY heat pump will be 20% VAT; if purchased with a professional installation, it will be 0% VAT. A professional installation ensures that your heat pump is designed and installed to be as efficient as possible, reducing your carbon emissions and energy bills. 

Preparing the day before installation 

A little preparation can go a long way. Here's what you can do the day before work commences to make the installation process smooth for you and the installation engineers. 

Clear the area 

Clear the space around where the indoor and outdoor units will be installed. This includes moving furniture, removing any obstructions, and ensuring the installers have easy access. 

Inform your neighbours 

Give your neighbours a heads-up about the installation. There might be some noise during the process, potentially for a few days, and keeping them informed is always courteous. 

Prepare for disruption 

Be aware that your heating will likely be turned off during the installation, typically for a couple of days. Plan accordingly, especially during colder months. However, we will always aim to have your hot water supply turned back on during the same day. 

Gather information 

Having all the necessary documents and information readily available streamlines the installation process and helps avoid unnecessary delays or complications. Here's a breakdown of the key items to prepare: 

1. Energy Performance Certificate (EPC): This certificate assesses your property's energy efficiency and is often needed for heat pump grant applications. 

2. Installer's Contact Details: Keep the installer's contact information easily accessible in case of any last-minute questions or adjustments to the schedule. 

3. Planning Permission Documents (if applicable): In some cases, planning permission may be needed for installing a heat pump, especially for larger units or those in conservation areas. 

4. Information about Existing Heating System: Having details about your current heating system, such as the type of boiler, radiator sizes, and any existing controls, can help the installers in assessing compatibility and planning the integration of the new heat pump. 

What to do on installation day 

Be available if possible 

Being present and available on installation day is ideal for a smooth and efficient process. The installation team may have questions about your preferences, the location of existing systems, or any specific requirements you may have. Your availability ensures that these questions are addressed quickly, preventing delays. 

Keep children and pets away 

Ensure children and pets are kept away from the installation area for their safety and to avoid any disruptions. 

Ask questions 

Don't hesitate to ask questions. The installers are there to help you understand the process and your new system. 

Review the installation 

Once the installation is complete, take the time to review the work with the installers. Make sure everything is to your satisfaction and that you understand how to run your new heat pump efficiently. 

Heat pump installation for commercial properties 

Key considerations before investing in a heat pump 

Before going ahead with the installation, consider these critical factors to ensure the suitability and effectiveness of an ASHP system for your commercial property: 

Property type and size 

ASHPs are versatile and can be adapted for various commercial properties, including warehouses, industrial facilities, educational buildings, hospitals, and agricultural properties. The size of your property will influence the required heat pump capacity and the complexity of the installation. 

Space assessment 

Evaluate the available space for both indoor and outdoor units. Outdoor units can be substantial in size. Adequate space ensures efficient operation and accessibility for maintenance. 

Existing infrastructure 

Assess your current heating and cooling infrastructure. Heat pumps can integrate with existing systems, but compatibility should be verified. 

Insulation and building fabric 

Evaluate the insulation levels of your building. While not mandatory, good insulation significantly enhances the performance of ASHPs. Conduct an energy audit to find areas for improvement. 

Energy demand analysis 

Understand your building's energy consumption patterns. This analysis will help select the right heat pump size and configuration to meet your specific heating and cooling needs. 

Regulatory compliance 

Ensure compliance with local regulations and building codes. Obtain necessary permits and approvals before beginning the installation. 

Preparing the day before installation 

Proper preparation minimises disruption and ensures a smooth installation. Here’s what to do the day before: 

Communicate with stakeholders 

Inform all relevant employees, tenants, and stakeholders about the upcoming installation. Provide a timeline and explain any potential disruptions. 

Clear the installation area 

Clear the areas around the indoor and outdoor installation sites. Move any equipment, machinery, or materials that might obstruct the installers. Ensure the area is safe to work in with adequate lighting and all health and safety measures are in place. 

Schedule any required power shutdown 

Coordinate with your energy provider to schedule a temporary power shutdown if necessary. Ensure all critical systems have backup power to avoid operational disruptions. 

Take extra safety measures 

Implement safety measures for company personnel, such as cordoning off the installation area and posting warning signs to prevent unauthorised access. 

Final check 

Review all preparations with the installation team to ensure they are happy to proceed. Confirm the installation plan and address any last-minute concerns. 

What to do on installation day

Supervise the installation 

Assign a designated contact person to oversee the installation process. This person should be available to answer questions and make decisions as needed. 

Monitor progress 

Keep track of the installation progress to ensure it aligns with the agreed-upon timeline and plan. Address any deviations promptly. 

Ensure safety 

Give a reminder of safety protocols to protect workers and building occupants. Regularly inspect the installation site for hazards and ensure compliance with safety regulations. 

Verify connections 

Check all electrical and plumbing connections to ensure they are properly installed and functioning. Verify that all systems are integrated correctly. 

System testing 

Once the installation is complete (which can take between 2 and 5 days), conduct thorough testing to verify that the heat pump is running efficiently. Check all settings and controls to ensure they meet your requirements. 

By taking these steps, commercial clients can ensure a seamless and efficient transition to heat pump technology, contributing to a more sustainable and cost-effective future. 

If you would like more information on heat pumps in general, you can find it on our heat pump FAQ page, or you can request information and a heat pump quote here.