Heat pumps — the range
These are the manufacturers we design with, what each is genuinely known for, and the numbers that matter. The one your home gets is chosen by the heat-loss survey — output, flow temperature and siting — never by brand loyalty.
Vaillant
Premium German engineering with class-leading efficiency on natural refrigerant.
Retrofits that keep existing radiators — the high flow temperature covers homes where emitters can't all change — and anyone who wants the efficiency benchmark.
Mitsubishi Electric
The UK's largest installed base — a reputation built on reliability and support.
Tight plots and noise-sensitive placements, and owners who value the deepest UK parts-and-service network over headline numbers.
Daikin
Big-brand performance at a sharper price — efficiency close to the premium tier.
Best value-per-point-of-efficiency in the range — a strong default for well-insulated homes with low-temperature emitters.
Samsung
High-temperature capability and smart-home integration at a competitive price.
Budget-conscious retrofits that still need hot radiator temperatures, and homes already run on smart-home platforms.
Grant
Designed for the UK and Irish climate by an off-grid heating specialist.
Oil-boiler replacements and larger rural properties — big outputs, honest pricing, and a range that shines in damp UK winters.
Figures are manufacturer-published typical values at low-temperature design and vary by unit size and conditions. The right pump — brand, model and output — falls out of your heat-loss survey, not a league table: a correctly sized mid-range unit will outperform a poorly sized premium one every winter.
The biggest driver of your running cost isn't the badge on the unit — it's whether the pump is sized to your home's measured heat loss and fed by emitters running at the lowest workable flow temperature. A correctly sized mid-range pump beats a poorly sized premium one, every winter.
So we survey first: room-by-room heat loss, existing emitters, hot-water demand, where the unit can physically and acoustically live. The design lands on a shortlist from the range above, priced with the Boiler Upgrade Scheme already applied where your home qualifies — £7,500, rising to £9,000 when you're replacing an oil or LPG system off the gas grid.
Book the free survey