Heat pump guide

Grant and Samsung, clearly compared.

There is no universal “best” model. The right choice follows a room-by-room heat-loss calculation, the flow temperature your home needs, available space and electrical supply.

Grant Aerona³ · R32

Compact, established range

Four single-phase outputs with A+++ rating at 35°C. A practical choice where compact dimensions and a proven R32 platform suit the design.

Outputs6, 10, 13, 17kWDimensionsFrom 898 × 675 × 379mmMax flowModel/system dependentRefrigerantR32

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Grant Aerona 290 · R290

Natural refrigerant, high-temperature capability

Quiet Mark accredited models using low-GWP R290, with outputs suited to a broad range of renovated and modern homes.

Outputs4, 6.5, 9, 12, 15.5kW9kW dimensions1228 × 835 × 441mmFlow temperatureUp to 75°CRefrigerantR290

Samsung EHS Mono HT Quiet · R32

High-temperature renovation option

A quiet, single-fan monobloc range designed for higher leaving-water temperatures and dependable operation in cold conditions.

Outputs8, 12, 14kW8kW dimensions1018 × 1270 × 530mmMax flow70°CRefrigerantR32

Samsung EHS Mono · R290

Modern, compact R290 platform

Single-fan units with smart-control options and a dark-grey exterior, available across common domestic design loads.

Outputs5, 8, 12, 16kW8kW dimensions998 × 850 × 500mmMax flow75°CRefrigerantR290

Dimensions are shown width × height × depth and vary by output/model. Images and headline specifications are sourced from Grant UK and Midsummer Wholesale; final equipment selection and siting follow a full EcoVance assessment.

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