The short answer
Mitsubishi Electric's Ecodan and Samsung's EHS are both popular air source heat pump ranges in the UK. Both offer monobloc units across common domestic outputs, both reach a SCOP of around 3 to 4, and both have ranges using R290 refrigerant in newer models. Ecodan is known for strong UK installer familiarity, wide parts availability and a long track record; Samsung's range is often noted for competitive pricing and value. Neither is objectively 'better' — the meaningful differences are in specific model specs, warranty terms, noise figures and how well your installer knows the brand. As with every heat pump, correct sizing, system design and installation quality by an MCS-certified installer affect real-world performance far more than the choice between these two ranges.
Ecodan and Samsung both appear regularly on UK quote sheets. Both are capable systems, so the practical questions are how they differ and what should drive the decision.
Ecodan vs Samsung
- Mitsubishi rangeEcodan (monobloc)
- Samsung rangeEHS (monobloc)
- Typical SCOPAround 3.0 to 4.0 (both)
- R290 modelsAvailable in newer ranges (both)
- Decisive factorSizing and installer quality
What each range offers
Mitsubishi Electric Ecodan is one of the most established air source heat pump ranges in the UK. It has strong installer familiarity, wide parts availability and a long track record, which tends to translate into confident system design and quick support if a fault occurs. The range covers the outputs most homes need.
Samsung EHS is a competitive range often highlighted for value, with monobloc options including R290 models. Samsung's scale as a manufacturer supports a broad product line, and its heat pumps are widely available through UK installers.
Both are mainstream choices. The useful comparison is between the specific models being quoted for your property, not between the brands in the abstract.
How they compare on the practical specs
On the headline numbers the two are close, and both are well supported in the UK. The differences that matter are model-specific, so compare the exact units in your quotes.
| Factor | Mitsubishi Ecodan | Samsung EHS |
|---|---|---|
| Configuration | Monobloc | Monobloc |
| Typical SCOP | ~3.0–4.0 | ~3.0–4.0 |
| R290 refrigerant | Available in newer models | Available in newer models |
| UK installer familiarity | Very high | Good |
| Often noted for | Track record, parts availability | Value, competitive pricing |
| What to verify | Model spec, warranty, noise | Model spec, warranty, noise |
Indicative comparison for guidance, not a ranking. Sources: manufacturer data; MCS; Which?.
Flow temperature, noise and hot water
When comparing an Ecodan quote against a Samsung one, three model-level details matter more than the brand name, because they shape comfort, efficiency and how easily the system fits your home.
Flow temperature sets how well the unit suits your radiators. R290 models from both ranges can reach higher flow temperatures, useful when keeping existing radiators in a retrofit, while lower flow temperatures raise efficiency where the emitters are sized for it. Compare each model's efficiency at the flow temperature your system is designed around, not just the headline SCOP.
Noise is important where the outdoor unit sits near a boundary or under a window. Both brands publish a sound power level for every model — compare those figures directly. Siting and anti-vibration mounting by the installer also affect perceived noise, and permitted-development rules in England include a noise condition.
Hot water performance depends on the cylinder and reheat strategy. Both ranges pair with matched cylinders and controls; using the manufacturer's own components can simplify commissioning and warranty cover. Ask how each system manages hot water recovery times and the legionella protection cycle.
What should actually decide it
Because both ranges are reliable and similarly efficient, let the system design lead. An MCS-certified installer's heat loss survey defines the output required and narrows each brand to a suitable model. Then weigh the factors that vary in practice: warranty length and terms, published noise figures, UK parts availability and lead times, and whether your installer regularly fits and commissions that brand.
Installer familiarity is a genuine differentiator — Ecodan's long UK presence means many installers know it intimately, while Samsung's value positioning can suit budget-conscious projects where the installer is equally confident with it. Whichever you pick, a correctly sized, well-commissioned system is what delivers a quiet, efficient, dependable heat pump. The brand choice should follow the design, not the other way round.
Frequently asked questions
Is Mitsubishi Ecodan better than Samsung?
Neither is objectively better. Both are reputable monobloc ranges that reach a similar SCOP of around 3 to 4 and offer R290 models in newer ranges. Ecodan is known for strong UK installer familiarity and parts availability; Samsung is often noted for value. The right choice depends on the specific model, warranty, noise figures and your installer's experience with the brand.
Do both ranges use R290 refrigerant?
Newer models from both ranges use R290, which has a very low global warming potential and supports higher flow temperatures — useful for retrofits keeping existing radiators. Older units may use other refrigerants, so confirm the exact model being quoted if R290 is important to you.
What matters more than the brand?
Sizing and installation quality. A correctly sized, well-designed and properly commissioned system from either Ecodan or Samsung will outperform a poorly designed install of either. Choose an MCS-certified installer who carries out a proper heat loss survey, and let the brand and model follow from that.
Sources & further reading
- MCS — find a certified installer
- Which? — heat pump brands and reviews
- Energy Saving Trust — air source heat pumps
Figures on this page are typical UK ranges drawn from published sources and depend on your specific home. They are guidance, not a quotation or guaranteed saving.