Should You Get a Heat Pump in the UK? (Guide)

Should You Get a Heat Pump? An Honest Answer

This is the question I get asked most often, and I'll give you the same answer I give homeowners who contact us directly: it depends but probably yes, if the system is designed properly.

That qualifier matters enormously. Heat pumps work extremely well in the right circumstances with the right design. They also fail to deliver in circumstances where the installation was rushed, the design was wrong, or the controls were never set up correctly. Having reviewed hundreds of systems, I can tell you that most of the complaints you see online about heat pumps are actually complaints about poor installations not about the technology itself.

When a Heat Pump Is Likely to Work Well for You

A heat pump is likely to be a good fit for your home if:

• Your property has reasonable insulation cavity or solid wall insulation, double glazing, a reasonably airtight envelope. It doesn't need to be a Passivhaus standard. Many Victorian terraces work perfectly well with heat pumps.

• You're replacing an ageing boiler and the heating system can be redesigned at the same time — radiator upgrades, system replumb, proper controls

• You're interested in running costs over time, not just upfront cost. Gas is currently cheaper per unit than electricity, but heat pump efficiency partially offsets this, and the gap narrows as tariffs shift

• You're applying for the Boiler Upgrade Scheme (BUS) grant, which currently offers £7,500 towards the installation cost this significantly improves the financial case

• Your installer will carry out a proper room-by-room heat loss calculation and design the system around that number, not around a rule-of-thumb

When a Heat Pump Might Not Be the Right Move (Yet)

There are situations where I'd advise homeowners to think carefully before committing:

• If your home is very poorly insulated and the budget doesn't extend to insulation improvements alongside the installation running a heat pump in a leaky house will work, but it will be expensive

• If you're getting quotes that don't include a heat loss calculation any installer who sizes a system based on floor area or a quick look around is not designing the system properly

• If the radiators are not being upgraded and the existing system was designed for boiler temperatures this is one of the most common causes of poor heat pump performance we see

• If you want instant high-temperature heat on demand, like you'd get from a gas boiler heat pumps work best when left to run steadily at lower temperatures. They're not the same experience as a boiler.

• This is one of the most common design failures we encounter — and it is covered in detail in our guide on why heat pump radiators only feel lukewarm, which explains what output you can realistically expect at heat pump flow temperatures and what can be done about it.

• If you have received a quote and want an independent check of the proposed design before committing, our Heat Pump Design Review covers exactly this — we assess the heat loss methodology, radiator specification, and system layout and tell you clearly whether the numbers stack up.

• A question that often comes up alongside this is how heat pumps cope in genuinely cold winters — our guide on whether heat pumps work in freezing temperatures gives an honest answer, including what is normal behaviour in cold snaps and what indicates a system problem.

The Most Important Thing to Get Right Before Installation

Heat loss calculation. Full stop.

Every properly designed heat pump installation starts with a room-by-room heat loss calculation. This tells you exactly how much heat each room loses on a cold day, which determines the size of heat pump you need, what flow temperature the system needs to run at, and whether your existing radiators are adequate.

Without this calculation, the system is guesswork. And guesswork leads to the problems undersized systems running constantly, oversized systems short-cycling, radiators that can't emit enough heat, flow temperatures set too high.

Before you agree to any installation, ask your installer for their heat loss calculation methodology. If they don't have one, or give you a vague answer, find a different installer.

What About Running Costs Is a Heat Pump Cheaper Than Gas?

This is the most contentious question in the heat pump world right now. The straightforward answer is: a well-designed and well-configured heat pump can achieve a COP of 3–4 in UK conditions, meaning it produces 3–4 units of heat for every unit of electricity consumed. Electricity currently costs roughly 3–4x more per unit than gas, which means the economics are roughly neutral for a well-run system but improve significantly if electricity tariffs drop relative to gas, as is expected over the coming decade.

A poorly designed system running at a COP of 1.5–2 will cost significantly more than gas. This is the scenario I see in many of the systems I review. The technology isn't the problem the installation is.

Our Recommendation

If you're considering a heat pump and want an independent view before committing, we offer a pre-installation design review. We look at your proposed system design, heat loss calculations, radiator specification, and control strategy, and give you a clear assessment of whether the design is likely to perform well and what should change if not.

This is particularly valuable if you've received multiple quotes and aren't sure which proposal is actually correct, or if your current installer hasn't provided a detailed design document.