Starting £450 + VAT
Starting £450 + VAT
Starting £450 + VAT
Independent Heat Loss Survey for UK Homeowners
Independent Heat Loss Survey for UK Homeowners
Not sure if your home is losing more heat than it should, or whether the heat pump you've been quoted is actually the right size? We calculate your property's heat loss room by room, flag any insulation or fabric issues affecting performance, and give you the independent numbers your installer needs to size a heat pump correctly, or the numbers to check theirs against. If you're earlier in the process and haven't chosen a system yet, our Pre-Installation Design Review covers this alongside broader system design advice, so it's worth reading both before you decide which one fits your situation.
✔ Room-by-Room Heat Loss
✔ Room-by-Room Heat Loss
✔ Room-by-Room Heat Loss
✔ Plumbing & Emitter Assessment
✔ Plumbing & Emitter Assessment
✔ Plumbing & Emitter Assessment
✔ Independent Technical Advice
✔ Plumbing Sketches Where Required
✔ Plumbing Sketches Where Required
✔ Plumbing Sketches Where Required
✔ Main Plant & Materials List
✔ Main Plant & Materials List
✔ Main Plant & Materials List
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Heat loss survey
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What is a heat loss survey?
A heat loss survey works out exactly how much heat your home loses, room by room, on the coldest expected day of the year. It looks at your walls, windows, floors, roof and ventilation to calculate the heating output each room actually needs. This is different from a thermal imaging survey, which uses a camera to spot cold spots and draughts. A heat loss survey is a numerical calculation, following the same BS EN 12831 methodology used across the industry, and it's the specific figure a heat pump has to be sized against.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
A heat loss survey works out exactly how much heat your home loses, room by room, on the coldest expected day of the year. It looks at your walls, windows, floors, roof and ventilation to calculate the heating output each room actually needs. This is different from a thermal imaging survey, which uses a camera to spot cold spots and draughts. A heat loss survey is a numerical calculation, following the same BS EN 12831 methodology used across the industry, and it's the specific figure a heat pump has to be sized against.
If a heat pump is installed without one, or with a rushed or over-generous estimate, it's usually either oversized, meaning it short-cycles and runs inefficiently, or undersized, meaning it struggles to keep the house warm in winter. We've written a full breakdown of exactly how this calculation works and why it decides your system size in our article, Heat Loss Calculation Explained, if you want the detail behind the numbers. We carry ours out independently, as experienced heat pump engineers, not as a step on the way to selling you an installation, which is the same principle behind everything we do, from Fix My Heat Pump to our Pre-Installation Design Reviews.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
If a heat pump is installed without one, or with a rushed or over-generous estimate, it's usually either oversized, meaning it short-cycles and runs inefficiently, or undersized, meaning it struggles to keep the house warm in winter. We've written a full breakdown of exactly how this calculation works and why it decides your system size in our article, Heat Loss Calculation Explained, if you want the detail behind the numbers. We carry ours out independently, as experienced heat pump engineers, not as a step on the way to selling you an installation, which is the same principle behind everything we do, from Fix My Heat Pump to our Pre-Installation Design Reviews.
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Why you need
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Why you need one before, or after, installing a heat pump
Getting this number right matters more than most homeowners realise. Heat pumps perform best when matched precisely to your home's actual heat demand rather than a rule-of-thumb estimate based on house size or the output of your old boiler. Get it wrong in either direction and you'll feel it: an oversized system short-cycles and runs inefficiently, while an undersized one can't heat the house properly on the coldest days. We saw exactly this play out in a real case, covered in our case study Choosing the Right Heat Pump Flow Temperature Before Installation, where getting the heat loss numbers right changed the entire system design before installation went ahead.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
Getting this number right matters more than most homeowners realise. Heat pumps perform best when matched precisely to your home's actual heat demand rather than a rule-of-thumb estimate based on house size or the output of your old boiler. Get it wrong in either direction and you'll feel it: an oversized system short-cycles and runs inefficiently, while an undersized one can't heat the house properly on the coldest days. We saw exactly this play out in a real case, covered in our case study Choosing the Right Heat Pump Flow Temperature Before Installation, where getting the heat loss numbers right changed the entire system design before installation went ahead.
Heat pumps also run at lower flow temperatures than a gas boiler, so we check whether your existing radiators or underfloor heating can actually deliver enough heat at those lower temperatures, and flag which ones would need upgrading. If you've already been given a heat loss figure as part of a quote, we can independently verify it before you commit to the installation, since it's not unusual for figures behind a quote to lean on optimistic assumptions about insulation or airtightness. A proper heat loss calculation is also often required for MCS-compliant installations and Boiler Upgrade Scheme grant funding, so getting it right can matter for eligibility as well as performance. And if you already have a heat pump that isn't performing well, it's worth knowing that a wrong heat loss calculation at the design stage is a common root cause; our article Heat Pump Problems After Installation: Who's Actually Responsible? goes into how to work out where the fault actually lies, and our Fix My Heat Pump service can help directly if that's the situation you're in now.
Heat pumps also run at lower flow temperatures than a gas boiler, so we check whether your existing radiators or underfloor heating can actually deliver enough heat at those lower temperatures, and flag which ones would need upgrading. If you've already been given a heat loss figure as part of a quote, we can independently verify it before you commit to the installation, since it's not unusual for figures behind a quote to lean on optimistic assumptions about insulation or airtightness. A proper heat loss calculation is also often required for MCS-compliant installations and Boiler Upgrade Scheme grant funding, so getting it right can matter for eligibility as well as performance. And if you already have a heat pump that isn't performing well, it's worth knowing that a wrong heat loss calculation at the design stage is a common root cause; our article Heat Pump Problems After Installation: Who's Actually Responsible? goes into how to work out where the fault actually lies, and our Fix My Heat Pump service can help directly if that's the situation you're in now.
Heat pumps also run at lower flow temperatures than a gas boiler, so we check whether your existing radiators or underfloor heating can actually deliver enough heat at those lower temperatures, and flag which ones would need upgrading. If you've already been given a heat loss figure as part of a quote, we can independently verify it before you commit to the installation, since it's not unusual for figures behind a quote to lean on optimistic assumptions about insulation or airtightness. A proper heat loss calculation is also often required for MCS-compliant installations and Boiler Upgrade Scheme grant funding, so getting it right can matter for eligibility as well as performance. And if you already have a heat pump that isn't performing well, it's worth knowing that a wrong heat loss calculation at the design stage is a common root cause; our article Heat Pump Problems After Installation: Who's Actually Responsible? goes into how to work out where the fault actually lies, and our Fix My Heat Pump service can help directly if that's the situation you're in now.
What's included in your survey
Your survey includes a full room-by-room heat loss calculation, an assessment of your existing radiators, underfloor heating and pipework against the calculated loads, and identification of any insulation or fabric issues affecting performance. You'll get independent technical advice that isn't tied to any installer or manufacturer, a clear written report with the figures your installer needs to size the system correctly, and the chance to ask us follow-up questions once you've had time to read through it.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
Your survey includes a full room-by-room heat loss calculation, an assessment of your existing radiators, underfloor heating and pipework against the calculated loads, and identification of any insulation or fabric issues affecting performance. You'll get independent technical advice that isn't tied to any installer or manufacturer, a clear written report with the figures your installer needs to size the system correctly, and the chance to ask us follow-up questions once you've had time to read through it.
How it works
How it works
It starts with a quick conversation about your property and what you're trying to figure out, whether that's a new installation, a second opinion on a quote you've already had, or concerns about a system you already own. From there we carry out the survey, calculating your heat loss room by room and assessing your existing heating system, radiators and pipework. You'll then receive a clear written report breaking down your property's heat loss and what it means for correct heat pump sizing, without jargon or a sales pitch attached. Once you've read it, we're available to answer any questions before you take it to an installer. If you're weighing this up against our other services, our article When Should You Get an Independent Heat Pump Review? is a useful read for figuring out which stage you're actually at.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
It starts with a quick conversation about your property and what you're trying to figure out, whether that's a new installation, a second opinion on a quote you've already had, or concerns about a system you already own. From there we carry out the survey, calculating your heat loss room by room and assessing your existing heating system, radiators and pipework. You'll then receive a clear written report breaking down your property's heat loss and what it means for correct heat pump sizing, without jargon or a sales pitch attached. Once you've read it, we're available to answer any questions before you take it to an installer. If you're weighing this up against our other services, our article When Should You Get an Independent Heat Pump Review? is a useful read for figuring out which stage you're actually at.
Why choose UK Heat Pump Help
Why choose UK Heat Pump Help
We're completely independent. We don't install heat pumps, sell equipment, or work on commission with any installer, so our numbers are just that: numbers, not a step toward a sale. With experience across hundreds of heat pump systems and more than 100 years of combined heating experience across our team, we know what a heat loss calculation needs to hold up to scrutiny, and what happens when one doesn't. If you'd like to see the kind of issues this uncovers in practice, our case studies cover real examples, including electricity bills that doubled because of an incorrectly configured flow temperature, and a heating fault that turned out to be a hidden leak rather than a heat pump problem at all.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
A standard heat loss calculation will tell you how much heat each room loses. We go considerably further. We're experienced plumbing, heating and heat pump engineers, so while we're carrying out the full room-by-room heat loss calculation, we're also looking at the property from the point of view of the engineers who will eventually have to install the system.
We're completely independent. We don't install heat pumps, sell equipment, or work on commission with any installer, so our numbers are just that: numbers, not a step toward a sale. With experience across hundreds of heat pump systems and more than 100 years of combined heating experience across our team, we know what a heat loss calculation needs to hold up to scrutiny, and what happens when one doesn't. If you'd like to see the kind of issues this uncovers in practice, our case studies cover real examples, including electricity bills that doubled because of an incorrectly configured flow temperature, and a heating fault that turned out to be a hidden leak rather than a heat pump problem at all.
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Faq
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Common Questions Heat Loss Survey & Calculation
How much does a heat loss survey cost?
Our heat loss surveys start from £540. Larger or more complex properties may need an individual quote.
Is this the same as a thermal imaging survey?
I already have a quote with a heat loss figure. Do I still need this?
Do you install heat pumps or work with installers on commission?
Contact Us
Not Sure Which Service You Need?
Not Sure Which Service You Need?
Not Sure Which Service You Need?
Not Sure Which Service You Need?
Not Sure Which Service You Need?
Whether you need help with an existing heat pump, a pre-installation review, cooling advice, servicing or a room-by-room heat loss survey, send us a few details and we'll point you in the right direction.
Whether you need help with an existing heat pump, a pre-installation review, cooling advice, servicing or a room-by-room heat loss survey, send us a few details and we'll point you in the right direction.
Whether you need help with an existing heat pump, a pre-installation review, cooling advice, servicing or a room-by-room heat loss survey, send us a few details and we'll point you in the right direction.
