A Guide to Heat Pump Assessments
A heat pump assessment tells you how a heat pump would work in your home. It will advise you on the benefits, the costs and the changes needed to get your home heat pump ready. Use the report to plan ahead and feel confident engaging a heat pump installer.
Heat pumps can mean a more comfortable home that is cheaper and cleaner to heat. But getting a heat pump can be tricky. Where will it go? Do you need to replace your radiators? Maybe you’ll be worried you’ll be left cold. A heat pump can be a big investment and you want to get it right.
A heat pump assessment gives you expert & independent advice. It can help you understand your property’s heat pump suitability. Get the best performance out of your heat pump and avoid nasty surprises.
This guide will help you decide if a heat pump assessment is right for you.
A heat pump assessment could be right for you if…
• You are considering upgrading to a heat pump and are looking into energy-efficient heating solutions
• Or you want your home improvements to be ready for a heat pump in future
It might not be ideal if…
• You want retrofit advice on how to insulate your home
Not sure what kind of assessment you need? Read on for more in-depth advice. You can also call or email us for free advice on where to start.
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The Heat Pump Assessment Process
On the day a surveyor will capture information about your home: heating system, how your home is constructed and how well it retains heat. The renewable heating assessment will take 1-3 hours, depending on the size of your home.
The surveyor will complete a room-by-room heat loss survey. This calculates how much energy is needed to keep each space warm on the coldest days. The room’s size and function, insulation and windows are all considered. This is crucial for designing an efficient low-temperature heating system.
You and the surveyor will identify a good location for the outdoor unit and hot water cylinder. This is about matching your preferences with the rules around noise, planning permission, and technical considerations.
The surveyor will also look for potential issues like electrical supply problems, site access difficulties, or radiators in poor condition, for example. This will inform the heat pump installation planning, should your report recommend you go ahead.
Factors that are considered in a heat pump assessment:
- How your home is constructed and how well it retains heat
- Your home’s insulation, ventilation and windows
- Space for the heat pump machine and any noise, planning permission and technical factors
- Site access difficulties
- Any electrical supply issues
- Radiator condition
As a minimum, the assessment report should recommend the most suitable heat pump type and size for your home. It will estimate costs for the installation and any necessary upgrades to radiators. Advice on what to do next, including connecting you with recommended installers working in your area.
The assessment may also include on-going support throughout the buying and installation process. Learn more about what our service providers offer. Got a question about Heat Pumps? Ask the professionals on our forum today!
Visit a Heat Pump
See a heat pump in action and get your questions answered by heat pump owners.
Visit a Heat PumpHeat Pump Assessment FAQs
How long does a heat pump assessment take?
The assessment will take 1-3 hours, depending on the size of your home.
What information do I need to provide for the assessment?
You might need to provide information about the space you have available for the heat pump itself, details on your home’s insulation and types of windows, and the energy performance certificate of your home.
Can a heat pump work with my existing heating system?
Yes, a heat pump can work with an existing radiator or underfloor heating system if designed and installed correctly.
However, it is rare that radiators which were installed with a gas boiler will be compatible with the heat pump systems due to the flow rate and temperature.
Can I see a heat pump before I get one?
Yes! Nesta run a ‘Visit a Heat Pump’ programme which can link you up to homeowners who can show you what it looks like in practice.
Why should I have a professional heat pump survey?
It’s essential to get expert advice before saying ‘yes’ to a heat pump. The benefits of having a professional heat pump assessment are as follows:
- They know what they’re looking for in your home
- They can advise on the heat pump specifications and type
- Avoid costly mistakes by making incorrect assumptions yourself
- Be thorough in the survey of your home and energy consumption
- You can make decisions based on professional opinions

