Here's the thing about the Samsung EHS Mono that nobody really wants to say plainly: it's the best value heat pump on the UK market right now. Not the cheapest thing you can buy (the budget brands exist for a reason), but the best balance of performance, price, and brand credibility. If you're working with a realistic budget, this is where to start.
The price difference is real
At £7,000–£10,000 installed, the Samsung EHS Mono typically comes in £2,000–£4,000 cheaper than the Vaillant Arotherm Plus for a comparable installation. Against the Boiler Upgrade Scheme's £7,500 grant, that arithmetic gets very interesting very quickly. Some households will find themselves with a net cost under £500 after the grant. That's not a typo.
| Spec | Detail |
|---|---|
| Refrigerant | R290 on the current EHS Mono R290 range; R32 on the outgoing HT Quiet range |
| COP (A7/W35) | Up to 5.0 (R32 HT Quiet 8kW) and up to 5.10 (R290), both brochure figures |
| Noise level | 56 dB(A) sound power / about 39 dB(A) sound pressure at 3m (35 dB in quiet mode) |
| Capacities | 5–16kW |
| Installed price | £7,000–£10,000 |
| Warranty | 2yr standard, longer through a Samsung-accredited installer. Samsung's UK site doesn't publish the extended term, so get it in writing |
A caveat on every number in that table. Samsung's UK climate site is brochure-led: it publishes PDFs rather than per-model spec pages, so unlike Vaillant, Mitsubishi and Grant there's no web page you can point at for a given unit's COP, SCOP or warranty length. We've kept the figures because they come from Samsung's own literature, but treat them as brochure claims and ask your installer for the ErP product data sheet for the exact model on your quote. If they can't produce it, that tells you something too.
The Samsung question
Most people's first reaction to "Samsung heat pump" is confusion. Samsung makes phones and TVs. Why would you trust them with your heating?
The honest answer: Samsung has been making air conditioning and HVAC equipment for decades and is one of the largest air conditioning manufacturers in the world. The domestic heat pump range sits in that climate solutions business, staffed by the same engineers, rather than being a side project bolted onto a consumer electronics company. The EHS Mono draws on that refrigeration and compressor expertise. It's not a stretch product.
That said, the brand perception issue is real. If you ask a neighbour whether they'd recommend their heating system, "it's a Samsung" lands differently than "it's a Mitsubishi". It's irrational, but human beings aren't always rational.
Performance in practice
A COP of up to 5.0 at A7/W35 for the 8kW HT Quiet model puts Samsung right up with the competition on paper. The larger 14-16kW models are slightly lower at around 4.6, which is still very good. Those are single-point brochure figures, though, not a season: what you'll actually live with is decided by flow temperature, radiator sizing and commissioning, and a well-installed Samsung lands in the same 3.2 to 3.5 real-world band as everything else on this list. Against the October 2026 price cap that's better than a 90% gas boiler, but not dramatically, and the gap is much wider if you're replacing oil, LPG or electric heating.
At about 39 dB(A) sound pressure at 3m (dropping to 35 dB(A) in quiet mode), it's one of the quietest units on this list. That's meaningfully better than the Grant Aerona3 and competitive with the Vaillant. Note that 39 dB(A) is a sound pressure figure at 3 metres, not the 56 dB(A) sound power in the row above, and the MCS 020 a) assessment uses sound power at the neighbour's window, so compare power with power.
The 5–16kW range is among the widest on this list, making it suitable for both smaller properties and larger homes with higher heat loss.
The support network
This is the genuine weak point. The Mitsubishi Ecodan has a network built over 20+ years in the UK market. Samsung's heat pump support infrastructure is newer and thinner. If something goes wrong (especially outside a major city), you may wait longer for a qualified engineer than you would with Mitsubishi.
That situation is improving. More installers are getting Samsung-trained as the brand grows market share. But it's a real consideration today.
The R290 range is the one to ask for now
This has moved on since we first wrote this page, so here's the current position: the EHS Mono R290 range is what Samsung's own UK site leads with, describing it as "Samsung's latest air source heat pumps". It isn't a preview any more, it's the range. Sizes are 5, 8, 12 and 16kW, the brochure COP is up to 5.10, the quiet-mode noise floor is 35 dB(A) sound pressure, and R290 has a GWP of 3 against 675 for R32, so no exposure to the F-gas phase-down.
The R32 HT Quiet range is the one being superseded. It's still a perfectly good machine and if you're quoted one at a genuinely better price it's not a mistake, but ask for the R290 first. The R290 models cost roughly the same and are the version Samsung is actually backing.
Who should buy this
- Anyone on a tighter budget who still wants a heat pump from a recognisable manufacturer.
- Anyone maximising the BUS grant: the lower installed cost means the grant covers a much higher proportion.
- Anyone in an urban area with good installer access where the thinner support network matters less.
- Anyone who's done the research and understands the Samsung HVAC pedigree. The brand perception concern doesn't affect the hardware.
Who should look elsewhere
- If you're in a rural area where installer access is already limited, the Mitsubishi's larger network is genuinely valuable.
- If you want the best possible long-term efficiency and can budget for it, the Vaillant Arotherm Plus has a higher ceiling.
- If brand confidence matters to you or your household, the Mitsubishi or Vaillant badge carries more weight in the UK.
The Samsung EHS Mono is the budget champion. Not a compromise. A smart choice for anyone who's done the maths. See our best heat pumps UK roundup for how it compares, and our heat pump costs guide for the full financial breakdown including the £7,500 BUS grant.