Samsung's EHS Mono range is a credible mid-market air source heat pump in the UK, with the 5kW to 16kW models eligible for the £7,500 Boiler Upgrade Scheme grant.
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Samsung's UK heat pump range is built around the EHS Mono platform, a monobloc unit aimed squarely at the residential retrofit market. The brand isn't trying to compete on prestige with Mitsubishi or on installer ubiquity with Daikin. It's competing on price, smart home integration, and a refrigerant cycle that handles cold British winters better than the spec sheet first suggests.
The headline technical point is the use of R32 refrigerant across the current range. Lower global warming potential than the older R410A, and it lets the unit run efficiently at lower outdoor temperatures. Samsung quotes guaranteed heating output down to minus 25°C on the High Temperature models, which is more headroom than you'll ever actually need in Bristol or Birmingham.
What sets Samsung apart in practice is the SmartThings app integration. If you already have Samsung appliances or a SmartThings setup, the heat pump folds in cleanly. You can schedule, monitor consumption, and tweak flow temperatures from your phone. Useful? Genuinely yes, if you're the sort of person who tinkers. Pointless if you set it once and forget it.
Here's the honest bit. Samsung is a competent mid-tier choice. It's not the quietest unit on the market (Mitsubishi Ecodan beats it on dB ratings) and it's not the most efficient at part load (Vaillant aroTHERM plus tends to edge it). But on price per kW installed, and on warranty terms, it sits in a sweet spot that's hard to ignore.
Three model families matter for UK homes: the EHS Mono, the EHS Mono HT Quiet, and the EHS Split. The Mono range is what most installers will quote you.
The EHS Mono Standard comes in 5kW, 8kW, 12kW, 14kW and 16kW outputs. This covers everything from a small two-bed terrace to a large detached house. It's a monobloc design, meaning all the refrigerant work happens in the outdoor unit and only water flows into your home. That makes installation simpler and means you don't need an F-Gas certified engineer for the indoor side.
The EHS Mono HT Quiet is the premium tier. Higher flow temperatures up to 70°C, which matters if you're keeping existing radiators rather than upsizing them. Sound levels drop to around 35 dB at one metre on the smaller units. That's quieter than a fridge.
| Model | Output | Best For | Typical Price (Installed) |
|---|---|---|---|
| EHS Mono 5kW | 5kW | 2-3 bed flat or small terrace | £9,000–£10,500 |
| EHS Mono 8kW | 8kW | 3-bed semi, well insulated | £10,000–£12,000 |
| EHS Mono 12kW | 12kW | 4-bed detached, average insulation | £11,500–£13,500 |
| EHS Mono HT Quiet 12kW | 12kW | Retrofit keeping existing radiators | £13,000–£15,000 |
| EHS Mono 16kW | 16kW | Large or poorly insulated property | £13,500–£16,000 |
The Split range exists but we rarely see it specified for UK retrofits. It needs an F-Gas qualified installer to commission the indoor unit, which narrows your installer pool and adds cost. Stick with the Mono unless your installer has a specific reason to push you toward the Split.
Most UK homeowners pay between £9,000 and £14,000 for a fully installed Samsung air source heat pump before any grant. That includes the unit, hot water cylinder, all pipework, controls, and commissioning.
The spread is wide for a reason. A straight swap on a well-insulated three-bed semi with an existing hot water cylinder location can come in under £10,000. A larger property needing radiator upgrades, a new cylinder location, and significant pipework rerouting will push toward £14,000 or beyond.
The big cost drivers, in order:
Radiator upgrades. Heat pumps run at lower flow temperatures than gas boilers, around 45°C to 50°C versus 70°C. Existing radiators may need swapping for larger ones. Budget £150 to £400 per radiator if upgrades are needed. Some homes need none, others need most replaced.
Hot water cylinder. You'll need an unvented cylinder sized for heat pump duty, typically 180 to 250 litres. Add £1,200 to £2,000 if you don't already have a suitable one. If you've been on a combi boiler, you'll need to find space for a cylinder, which sometimes drives bigger building work.
Electrical supply. Most homes are fine on a standard single-phase supply, but if your fuse board is full or your incoming supply is undersized, you might need an upgrade from the DNO. That can add £500 to £2,000 and weeks of delay.
We see a lot of quotes come in around £11,500 for a typical 8kW or 12kW Samsung install on an average UK home. Anything materially below £9,000 should raise an eyebrow. Anything above £15,000 needs a clear reason, ask the installer to itemise.
For a deeper look at how heat pump pricing breaks down generally, our heat pump cost guide covers the full picture across brands.
Yes. The Boiler Upgrade Scheme gives you £7,500 off the cost of a Samsung air source heat pump, provided the model and installer are MCS certified. Samsung's EHS Mono range qualifies across all outputs.
The grant runs until March 2030 (extended from the original 2028 deadline in the April 2026 amendment) and the application is handled by your installer, not you. They claim the £7,500 from Ofgem and apply it as a discount on your invoice. You pay the net amount.
There are conditions. Your property must have a valid EPC with no outstanding recommendations for loft or cavity wall insulation. If you've got insulation gaps flagged, you'll need to fix those first or get an exemption. The grant only applies to homes replacing fossil fuel heating (gas, oil, LPG, electric storage). It doesn't apply to new builds or to replacing an existing heat pump.
If you're on means-tested benefits, ECO4 might cover even more, potentially the full installation cost. The eligibility rules are different and the route runs through your energy supplier rather than the installer. We've covered the ECO4 route in detail separately, and you can run your specific circumstances through the eligibility checker in about two minutes.
Worth flagging: BUS now also covers air-to-air heat pumps at £2,500, added in the April 2026 amendment. Samsung makes air-to-air units (their Wind-Free range is popular in commercial settings) but the grant route for residential air-to-air is still bedding in. Most domestic Samsung installs you'll see quoted in 2026 are still the air-to-water EHS Mono, qualifying for the full £7,500.
For the full mechanics of how the grant claim works, see the Boiler Upgrade Scheme guide.
Samsung sits in the middle of the UK heat pump market on price, performance, and installer availability. It beats budget brands on warranty and quality. It loses to premium brands on noise and part-load efficiency.
Here's how it stacks up against the main rivals we see quoted alongside it:
| Brand | Typical SCOP | Warranty | Noise (dB) | Price (8kW installed) |
|---|---|---|---|---|
| Samsung EHS Mono | 4.0–4.6 | 7 years | 38–42 | £10,000–£12,000 |
| Mitsubishi Ecodan | 4.2–4.8 | 7 years | 35–40 | £11,500–£13,500 |
| Daikin Altherma 3 | 4.3–4.9 | 5 years (10 with annual service) | 37–42 | £11,000–£13,000 |
| Vaillant aroTHERM plus | 4.5–5.0 | 7 years | 33–38 | £12,000–£14,500 |
| Grant Aerona³ | 3.9–4.4 | 7 years | 39–43 | £9,500–£11,500 |
Mitsubishi is the safe premium choice. Best installer network, strong real-world performance, slightly quieter than Samsung. You pay £1,500 to £2,000 more for it. If you can stretch the budget and you live next to a sensitive neighbour, it's worth it.
Daikin is the volume player. You'll find a Daikin-certified installer in every UK postcode. Performance is excellent. The warranty story is more complicated though, you only get the full 10 years if you sign up for annual servicing through an approved partner.
Vaillant is the quiet, efficient option for tight installs. Top of the class on SCOP and dB ratings, but you'll pay for it.
Samsung's pitch versus all of these is simple. You get most of the performance for less money, with a clean seven-year warranty and no servicing strings attached. The trade-off is a smaller installer network, which can mean longer lead times and fewer competing quotes in some areas.
For a wider comparison, our roundup of the best air source heat pumps for 2026 ranks the full field.
Samsung is the right call if you want strong mid-market performance, a clean warranty, and don't need the absolute lowest noise levels. It's the wrong call if your installer doesn't have direct Samsung experience or if you're chasing the last 0.3 of SCOP efficiency.
The homes where we see Samsung work best:
Where Samsung might not be the right shout: very tight urban gardens where every dB matters (Vaillant or Mitsubishi quieter), large rural properties on oil heating needing maximum reliability (the wider Mitsubishi service network helps), or anywhere your local installer pool genuinely doesn't include a Samsung-trained MCS engineer.
On that last point. Don't pick a brand and then look for an installer. Pick three good local MCS installers, see which brands they quote, and let the installer relationship lead. A great installer fitting a Samsung will beat a mediocre installer fitting a Mitsubishi every time. Heat pump performance is 60% installer, 40% kit. Maybe more.
Honest bit before you go. If you're early in your research, run your postcode and benefit status through the eligibility checker before you start collecting quotes. Knowing whether you're looking at the £7,500 BUS route or the fully-funded ECO4 route changes everything about how you should shop. Different installer pools, different paperwork, different timelines.
And if you're still weighing up heat pumps versus a new boiler more generally, our air source heat pump UK guide covers the running cost maths in detail. That's the conversation most people should have before brand-shopping.
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