£295
total · includes VAT
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Pre-Installation Design Review
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Make Sure Your Heat Pump Design Is Right Before You Commit
An independent review of your heat pump sizing and heat loss calculation, before you commit to an installer's quote.
The biggest mistakes with heat pumps happen before they're even installed. A heat pump that's the wrong size or poorly designed can leave you with higher electricity bills, poor comfort, and years of frustration. We independently review your design before you commit, so you know you're making the right decision.
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Who This Is For
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Is This the Right Service for You?
A £295 independent review could save you thousands by identifying design issues before installation begins.
A heat pump installation is a significant investment, typically costing £8,000–£15,000 or more. While grants can reduce the upfront cost, they don't confirm that the system has actually been designed correctly for your home. A poorly designed heat pump doesn't usually fail on day one — problems often appear months or years later, through higher bills, poor comfort, short-cycling, excessive compressor wear, or a system that never performs as promised.
This review is ideal if:
✔ You're considering a heat pump but want expert advice before speaking to installers, so you understand what a good design should look like.
✔ You've received a heat pump quote and want an independent second opinion before committing.
✔ You've received two or more quotes and want to know which design is technically correct, not just the cheapest.
Unlike an installer, we don't sell equipment or carry out installations. Our job is simply to review the proposed design independently and tell you whether it stacks up, giving you clear, unbiased advice before you commit.
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What We Check
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Common Design Problems We Find Before Installation
Getting heat pump sizing right is the single biggest factor in how well your system will perform, and it's also the thing installers most often get wrong. Here's what we check:
Oversized heat pump. This is the single most common issue we see. It usually happens because the heat pump has been selected using a rule of thumb rather than a proper room-by-room calculation, leading to short bursts of running, higher costs, more wear, and a less comfortable home.
Undersized heat pump. Less common than oversizing, but often more serious. An undersized heat pump may work perfectly during mild weather but struggle to keep your home warm on the coldest days, pushing the backup heater to run constantly and significantly increasing bills.
Radiators too small for the design. A correctly sized heat pump is only part of the equation. Radiators or underfloor heating also need to deliver enough heat at the lower flow temperatures a heat pump is designed to run at, and systems upgraded from a gas boiler often need resizing.
Flow temperature too high. Every degree higher than necessary increases running costs. A well-designed system should always aim for the lowest practical flow temperature.
Pipework too small. A heat pump can be correctly sized on paper but still perform poorly if the existing pipework can't carry the required water flow, reducing efficiency and limiting heat output.
Poor zoning strategy. Too many zones, incorrectly positioned controls, or zoning that hasn't been considered alongside the design can reduce efficiency and cause rooms to overheat or never quite reach temperature.
Unnecessary buffer vessels and low loss headers. These are sometimes essential, but frequently added as a default without being genuinely required, increasing cost and occasionally introducing the very short-cycling issues they're meant to prevent.
Incorrect hot water cylinder sizing. A cylinder that's too small may run out of hot water during busy periods, while one that's unnecessarily large wastes energy reheating water you don't need.
Weather compensation not configured properly. This allows the heat pump to automatically adjust its flow temperature as outdoor conditions change, and it's one of the biggest efficiency improvements available, yet it's often overlooked during design.
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What's Included
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Everything Covered in Your £295 Review
Your review covers far more than simply checking the heat pump size. We carry out an independent assessment of the complete system design before installation begins, highlighting any technical concerns and explaining what they mean in plain English.
Your review includes:
✔ Heat loss calculation review
✔ Heat pump sizing validation
✔ Flow temperature assessment
✔ Radiator and emitter suitability
✔ Hot water cylinder review
✔ Pipework and hydraulic design review (where information is available)
✔ Weather compensation and controls assessment
✔ Identification of any design risks or specification concerns
✔ Clear recommendations before installation begins
✔ A one-to-one video call to discuss the findings and answer your questions
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How We Work
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A Process Built Around Honesty
Getting a straight answer shouldn't be complicated. Here's how it works.
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Satisfaction Guarantee
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Backed by Our Guarantee
If after receiving your report you feel it hasn't provided useful technical insight or clarity, contact us within 7 days. We'll review your concerns, and if we agree the service hasn't delivered the expected value, we'll provide a full refund.
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FAQ's
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Frequently Asked Questions
Answers to the questions homeowners ask us most before booking a review.
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cta
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Not Sure If We Can Help?
Send us a short description of your issue no obligation. We'll tell you honestly if a review is worthwhile.