The Grant Aerona3 6kW Air Source Heat Pump, paired with a 210 litre pre-plumbed hot water cylinder and full installation pack, delivers efficient, low-carbon heating and hot water for smaller UK homes. This inverter-driven, monobloc heat pump uses R32 refrigerant and is engineered to achieve a SCOP of up to 4.61 at 35°C flow, meaning it typically needs several times less input energy than the heat it delivers.
6.92kW
Heating Capacity (7°C/35°C)
SCOP 4.61
Seasonal Efficiency (35°C)
210L
Pre-Plumbed Cylinder
54.2dB(A)
Sound Pressure @ 1m
Weather Compensation Built In
The Aerona3 continuously adjusts flow temperature based on outdoor conditions, automatically optimising running efficiency without manual intervention from the homeowner.
DNO Notification Required
All Grant Aerona3 installations must be notified or approved by the local Distribution Network Operator (DNO) before or shortly after connection. For the HPID6R32, DNO notification is possible retrospectively within 28 days where the maximum demand is 32A or less and eligibility criteria are met; always confirm current requirements with the DNO for the installation address.
Installation Pack Ordered Separately by Configuration
This bundle includes a Grant installation pack, but Grant offers six different pack configurations (Packs A, B, C, K, L, M) depending on whether an S-Plan or 3-port diverter valve system is used and whether the cylinder is pre-plumbed. Confirm the exact pack configuration matches your intended system layout before installation.
DC Inverter Technology
Smoothly varies compressor, fan and pump speed to match real-time heating demand, reducing on/off cycling and keeping running costs low even as outdoor conditions change.
Compact, Space-Saving Footprint
At 825mm (W) x 675mm (H) x 300mm (D) and 51kg dry weight, the HPID6R32 unit has one of the smallest footprints in its output class, suiting properties with limited external space.
Quiet Twin-Rotary Compressor
The high-efficiency DC twin-rotary compressor is rated at just 54.2dB(A) sound pressure at 1 metre, helping the unit meet noise limits close to boundaries and windows.
Automatic Frost Protection
A factory-fitted base tray heater activates at 2.5°C ambient to prevent condensate freezing in the base of the unit, switching off automatically at 5.5°C.
210 Litre Pre-Plumbed Cylinder
The cylinder arrives with heat pump-specific plumbing and controls factory-fitted, reducing on-site installation time compared to a standard unvented cylinder.
MCS Approved for Grant Funding Schemes
The Aerona3 range is MCS approved, supporting eligibility for UK government incentive schemes such as the Boiler Upgrade Scheme where installation criteria are met.
Technical Specification
| Heat Pump Performance |
| Heating Capacity (7°C air / 35°C flow) |
6.92 kW |
| COP (7°C air / 35°C flow) |
4.91 |
| SCOP – average climate (35°C) |
4.61 |
| Heating Capacity (7°C air / 55°C flow) |
6.24 kW |
| COP (7°C air / 55°C flow) |
3.04 |
| SCOP – average climate (55°C) |
3.29 |
| ErP Rating (35°C flow) |
A+++ |
| Electrical & Refrigerant |
| Power Supply |
230V, 1-phase, 50Hz |
| Maximum Running Current |
11.2A |
| Recommended MCB |
16A, Type C |
| Refrigerant |
R32 |
| Refrigerant Charge |
0.80kg |
| Maximum Pressure |
4.2 MPa |
| Physical & Hydraulic |
| Dimensions (W x H x D) |
825mm x 675mm x 300mm |
| Weight (dry) |
51kg |
| Weight (full) |
52.8kg |
| Water Connections |
¾″ BSPF |
| Minimum Flow Rate |
5 litres/min |
| Sound Power Level @ 1m |
65.2 dB(A) |
| Sound Pressure Level @ 1m |
54.2 dB(A) |
| Operating Range & Cylinder |
| Outdoor Operating Temperature |
-20°C to 43°C |
| Cylinder Capacity |
210 litres, pre-plumbed |
| MPN (Heat Pump) |
HPID6R32BODY |
Frequently Asked Questions
What size property is the Aerona3 6kW suited to?
The 6kW model is Grant's entry-level Aerona3 output, generally suited to smaller, well-insulated UK homes. An accurate heat loss calculation for the specific property should confirm this is the correct size before purchase.
Does the 210L cylinder come pre-plumbed?
Yes, the cylinder in this bundle is pre-plumbed with heat pump-specific connections and controls already fitted, reducing on-site installation work.
What refrigerant does the Aerona3 6kW use?
It uses R32 refrigerant, with a charge of 0.80kg, factory-sealed within the monobloc unit.
Is DNO notification required before installation?
Yes. All Aerona3 installations require DNO notification or application. For the 6kW model, retrospective notification within 28 days may be possible if maximum demand is 32A or less and other criteria are met – confirm current requirements with the relevant DNO.
What is the manufacturer's warranty on this heat pump?
Grant provide a standard 2-year warranty, extendable to longer terms when installed by a Grant-certified installer under their extended warranty scheme; terms apply.
