Installer Directory
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Written-by

Janet Richardson

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Updated on

Sep 23, 2023

Read Time : 3 Minutes

How is a Heat Pump installed

Heat Pump Installation Walk Through

Before you even consider who you are going to get to install your heat pump system you need to do a full assessment of the current energy performance of your house or office. Although your installer can do this for you it can be cheaper to employ an independent energy assessor who can issue you with an Energy Performance Certificate (EPC). An EPC contains:

  • information about a property’s energy use and typical energy costs
  • recommendations about how to reduce energy use and save money

An EPC gives a property an energy efficiency rating from A (most efficient) to G (least efficient) and is valid for 10 years. If you are a building developer, contractor or architect looking to install a heat pump in a new build check out our Renewable Energy Shop MCS Sign off package to save you money and time on your project. 

Insulation

How well your property is insulated plays a big part in the size of heat pump you select and how efficient it is going to be. Compared to something like a gas boiler, heat pumps produce heat at a much lower but more constant temperature which means that insulation becomes all the more important. This should include:

  • Cavity/wall insulation.
  • Loft insulation.
  • Double glazing.

You may also want to take a look at how well your floors are insulated if you live in a much older house.

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Air or Ground Heat Pump?

The next thing you need to look at is whether you are going to go for an air or ground heat pump. As a rule, air heat pumps are easier to install but are slightly less efficient. The one thing you will need to decide is whether you have the external space to accommodate the main pump unit. A ground heat pump is more efficient but needs a site where the external pipes can be buried and involves a good deal of excavation work. If the workmen cannot access your site with their diggers and heavy machinery then you may want to look at an air source heat pump instead.

Finding the Right Installer

You can search our database for a list of installers close to your post code here. We recommend that you get at least three quotes for the work to be done and do your research on the technology beforehand so that you can ask the right questions. Before installing your heat pump, you will need to consider the Boiler Upgrade Scheme which is a government initiative that helps with the high upfront costs of installing a heat pump. The BUS can offer up to £7,500 and is simply to apple for providing your property meets the energy efficiency requirements. To qualify for this you will need to ensure that your installer is a member of the Microgeneration Certification Scheme.

Air Source Heat Pump Installation

Air source heat pumps can be either mounted onto a wall or positioned on the ground. First of all you need to find a suitable place to situate the main unit. This ideally needs to be in a sheltered and safe place where it won’t be subjected to heavy rains and winds or be tampered with by anyone passing by. You also need a reasonable clearance around the unit (about 200mm for some wall mounted units, more for bigger, floor systems). The installation will involve an outdoor section and an indoor section, so make sure there is enough space inside as well. Once both units are fitted onto their mountings, refrigerant and drain hose pipes are connected and then insulated, both inside and out. The whole system can then be connected to your indoor heating system such as the boiler or radiators.

Ground Source Heat Pump Installation

Ground Loops Heat Pump

Installing a ground source heat pump is far more complex than an air source one. You will, first of all, need the space to lay the pipes and you will have to provide access to heavy equipment such as diggers. Installation of a ground source heat pump should not need planning permission despite the disruption caused by digging up the ground, as it is considered a permitted development. If you live in a listed building or in a conservation area then the rules will be different. Either way, it is always wise to check with your local council first to make sure you installation is possible. If you have enough garden space then an array of horizontal ground pipes that collect heat over a wide area is probably the better option.

If you have a small area then it may be possible to dig down vertically by drilling a bore hole up to 100m deep. This will obviously depend on the nature of the ground under your property and may require a full survey which could add a significant cost to the build. The pipes from the outside array feed into the heat pump within the building which is then connected to the existing heating supply such as radiators as with an air source heat pump.

How to Benefit from the Boiler Upgrade Scheme. 

As long as you have had your installation carried out by a company that is part of the Microgeneration Certification Scheme and your property meets the current eligibility requirements, you may be applicable for the Governments Boiler Upgrade Scheme (BUS)
You must have an EPC with no advisories for loft insulation or cavity insulation. Exemption can be given in cases when insulating is not advisable or if the property is listed or in a conservation area.
The BUS has recently been increased from £5,000 to £7,500. Your installation company must be Trademark or/and MCS certified. The installation company will apply for the grant for you in most cases. The grant is not available to developers but can be given if a new build is classed as self build.    

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