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Grant Aerona3 R32 13kW vs Heatrae Sadia Megaflo Eco 250

The Grant Aerona3 R32 13kW is a r32 inverter driven air source heat pump, 13 kw heat output. The Heatrae Sadia Megaflo Eco 250 is a indirect unvented hot water cylinder, 250 litres.

Last reviewed 13 September 2026

Specifications side by side

Grant Aerona3 R32 13kWHeatrae Sadia Megaflo Eco 250
Dimensions1418 x 1024 x 403 mm (H x W x D)1738 x 579 x 600 mm (H x W x D)
Warranty7 years when installed by a Grant G1 accredited installerLifetime guarantee in domestic installations
Heat output13 kW-
SCOP5.40 (35C flow), 3.72 (55C flow)-
RefrigerantR32-
Weight99 kg-
Capacity-250 litres
Heat-up time-34 minutes (15 L/min recovery, 15C to 60C)
Max inlet pressure-1.6 MPa (16 bar)
Immersion heater-3kW incoloy immersion, back-up

Sources: Grant Aerona3 R32 13kW, Heatrae Sadia Megaflo Eco 250. Figures vary by model year and options, so check with the supplier before you commit.

Buy or hire the Aerona3 R32 13kW if...

A 13kW R32 inverter driven heat pump from Grant's Aerona3 range, a common choice for off-gas-grid homes that previously ran an oil boiler. It carries a 7 year warranty through Grant's G1 installer scheme, one of the longer standard terms in this category.

Full Aerona3 R32 13kW specifications →

Buy or hire the Megaflo Eco 250 if...

A 250 litre indirect unvented cylinder from Heatrae Sadia's Megaflo Eco range, one of the most fitted cylinder brands in the UK. It reheats in about 34 minutes at a 15 litre/min flow rate and carries a lifetime guarantee in a domestic installation.

Full Megaflo Eco 250 specifications →

Common questions

What is the difference between the Grant Aerona3 R32 13kW and the Heatrae Sadia Megaflo Eco 250?

The Grant Aerona3 R32 13kW is a r32 inverter driven air source heat pump, 13 kW heat output; the Heatrae Sadia Megaflo Eco 250 is a indirect unvented hot water cylinder, 250 litres.

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