Samsung Heat Pump Review UK: EHS Mono HT Quiet 8kW

The Samsung EHS Mono HT Quiet is a high-temperature R32 monobloc air source heat pump that Samsung launched in the UK in October 2022 for homes that want to keep their existing radiators. This Samsung heat pump review covers the 8kW model (AE080BXYDEG/EU, single phase): what Samsung actually publishes about flow temperature, efficiency and noise, how the HT Quiet differs from Samsung's cheaper standard Mono, and the gaps you should close with your installer before signing. For how SCOP is measured, read our heat pump efficiency explainer; for the wider market see our best air source heat pump UK roundup.

Samsung EHS Mono HT Quiet 8kW specifications

These figures come from Samsung's UK product page for the 8kW single-phase unit. Where the page prints no figure, the table says so rather than guessing.

HT Quiet vs Samsung's standard Mono: don't mix up the model codes

Samsung sells two different 8kW monobloc outdoor units that retailers often blur together. The HT Quiet is the BXYDEG code; the standard Mono is the RXYDEG code. Their published specifications differ materially, so check the exact model on any quote.

The practical reading: the HT Quiet is the bigger, heavier unit built to reach higher flow temperatures and colder outdoor conditions, and Samsung publishes a lower noise figure for it. The standard Mono is smaller and lighter, which can matter for wall brackets, plinths and tight sites. Some retailer listings and catalogue entries mix the two codes up, so confirm the model on the installer's MCS paperwork.

Flow temperature: the reason to choose a high-temperature heat pump

Heat pumps run most efficiently at low flow temperatures, which is why they pair best with underfloor heating or oversized radiators. Homes with older, smaller radiators sometimes need hotter water, which is where a high-temperature unit helps. Samsung lists up to 70°C leaving water for the HT Quiet, against up to 65°C for the standard Mono. Efficiency falls as flow temperature rises: Samsung's own 65°C test result is a SCOP of 2.82, against an A+++ label at 35°C. Treat 70°C as headroom for cold days and hot water, not a setting to run all winter. A proper room-by-room heat loss survey will show whether radiator upgrades would let you run cooler and cheaper. Our heat pump running costs guide shows how flow temperature feeds through to bills.

Noise: 42 dBA, 35 dB(A) and what they mean

Samsung markets the HT Quiet with noise levels "as low as 35 dB(A)", measured 3 metres from the front of the unit in an anechoic room at 7°C outside, using the 4-step Quiet Mode. The spec table gives 42 dBA sound pressure and 56 dBA sound power for the 8kW model, with no test conditions stated. Use the 42 dBA figure as the realistic starting point and treat 35 dB(A) as a best case with Quiet Mode on, which also trims output. Real-world noise depends on distance to the neighbour's boundary, reflective walls and mounting, so see our heat pump noise guide for the planning-permission angle.

Boiler Upgrade Scheme eligibility and installed cost

Heat pumps installed by an MCS-certified installer can qualify for the Boiler Upgrade Scheme, currently £7,500 off the installed price in England and Wales (GOV.UK). The scheme is funded at £400 million in 2027-28 according to Budget 2026, as covered in our BUS and Budget 2026 explainer. Eligibility depends on the exact model being MCS-listed and the installer being certified, so ask for the model code and MCS certificate number on the quote. This review does not quote a Samsung price: no UK list price is published on Samsung's pages, and installed cost depends on cylinder, radiators, pipework and groundworks. Always obtain at least three quotes.

Wi-Fi, SmartThings and warranty: the gaps to check

• Connectivity: Samsung's page says remote control needs a Wi-Fi connection and a SmartThings account, while its spec table lists embedded Wi-Fi and the Wi-Fi kit as "N/A". Ask whether a Wi-Fi kit is included in your quote.
• Warranty: Samsung's UK consumer pages give no warranty length, only that an annual service is needed to keep the warranty valid. Get the term and conditions from your installer in writing before signing.
• Efficiency numbers: only the 65°C SCOP (2.82) is published as a number. Ask your installer for the design SCOP for your house at your design flow temperature, which is what your bills will track.

Who the Samsung HT Quiet suits

Good fit: homes with existing radiators that cannot easily be enlarged, properties where cold-weather performance matters, and buyers who value a published Quiet Mode. Look elsewhere if: you have a very tight site (the unit is 126kg and 1.27m wide), you want a clearly published long warranty up front, or your house will run happily at low flow temperatures, in which case a standard model may be cheaper to buy. Samsung also sells HT Quiet in 12kW and 14kW sizes for larger homes. If you plan to add solar later, our are heat pumps worth it guide covers the running-cost case.

Our verdict

The Samsung EHS Mono HT Quiet is a credible high-temperature heat pump with an unusually wide published operating range and a quoted Quiet Mode. Its weaknesses are information gaps rather than known faults: no UK warranty figure and no numeric SCOP at standard flow temperatures on Samsung's pages. Treat it as a strong candidate for radiator retrofits, but get the model code, design SCOP, noise assessment and warranty in writing, and compare it with Daikin, Mitsubishi and Vaillant quotes before deciding.