R290 Monobloc Heat Pumps

Propane monoblocs from 4 kW to 16 kW for homes and 22 kW to 40 kW for commercial buildings. The sealed refrigerant circuit stays inside the outdoor unit, so the installer makes water-side connections only.

AUX R290 monobloc air source heat pump
A+++
energy class at both 35 °C and 55 °C flow
80 °C
maximum flow temperature, held down to −10 °C outside
GWP 3
R290 natural refrigerant
128 kW
cascade of up to 8 units on one system

Why R290 monobloc

Built for UK radiators, underfloor heating and fan coils

AUX R290 monobloc heat pump, front view
  • Full output in cold weather

    Rated heating output is maintained at −7 °C outside, and the unit keeps supplying 80 °C water down to −10 °C.

  • MCS certified and grant ready

    Every domestic model is MCS certified and listed in the Product Characteristics Database at 35 °C and 55 °C. Installations qualify for the Boiler Upgrade Scheme through an MCS‑certified installer.

  • Open controls

    Native RS485 Modbus with a documented register map, so Passiv UK and Adia Thermal controls connect without an adapter.

  • Built for installers

    Built‑in strainer, 3 kW back‑up heater on single-phase models (9 kW on three-phase), weather compensation as standard and a dual-zone option.

Features

What sets the R290 monobloc apart

  • AUX R290 monobloc heat pump: stylish design

    Stylish design

    AUX AI Thermal Monobloc system is characterized by its stylish matte black casing made from weather resistant materials, ensuring its aesthetic appeal remains for years to come.

  • AUX R290 monobloc heat pump: energy efficiency a+++

    Energy efficiency A+++

    The R290 AI Thermal boasts energy efficiency of A+++/A+++. Its SCOP is 5.4*

  • AUX R290 monobloc heat pump: hot water to 80 °c

    Hot water to 80 °C

    The AUX R290 Monobloc System provides hot water reaching a temperature up to 80 °C.

  • AUX R290 monobloc heat pump: stylish intuitive control

    Stylish intuitive control

    27 language menu, stylish casing, heat pump can be set up via USB and the controller for easy commissioning.

  • AUX R290 monobloc heat pump: low level noise

    Low level noise

    AUX heat pumps feature inverter compressors for quiet outdoor operation. With triple insulation and AUX patented fan design noise levels are reduced to 35 dB(A) at 3 m. The silent mode function offers two levels for added comfort.

  • AUX R290 monobloc heat pump: flexible design solutions

    Flexible design solutions

    Flexible compatibility with various heating systems including: underfloor, radiators or fan coil units. Option also to power from your solar system.

  • AUX R290 monobloc heat pump: dual temperature zone

    Dual temperature zone

    Catering to individual preferences, this feature offers distinct climate control for different areas, ensuring personalised comfort in homes or workplaces.

  • AUX R290 monobloc heat pump: smart grid ready

    Smart Grid ready

    Heat pumps marked with SG Ready label are equipped with control system that allows to connect a single heat pump into a smart grid.

Domestic range

4 kW to 16 kW, single and three phase

Seven single-phase outputs from 4 kW to 16 kW and five three-phase outputs from 8 kW to 16 kW. All models are A+++ at 35 °C and 55 °C flow, MCS certified and PCDB registered.

Single phase · 220 –⁠ 240 V · 3 kW back‑up heater

Single phase · 220 –⁠ 240 V · 3 kW back‑up heater
SKUModelOutputUnit size
W × D × H
R290 chargePCDB index
35 °C / 55 °C
A1010ACHP-H04/4R2HA-M4 kW1130 × 420 × 710 mm0.55 kg110434 / 110432
A1011ACHP-H06/4R2HA-M6 kW1130 × 420 × 710 mm0.55 kg110442 / 110440
A1012ACHP-H08/4R2HA-M8 kW1280 × 420 × 1040 mm0.85 kg110450 / 110448
A1013ACHP-H10/4R2HA-M10 kW1280 × 420 × 1040 mm0.85 kg110458 / 110456
A1014ACHP-H12/4R2HA-M12 kW1280 × 420 × 1040 mm1.35 kg110466 / 110464
A1015ACHP-H14/4R2HA-M14 kW1280 × 420 × 1040 mm1.35 kg110474 / 110472
A1016ACHP-H16/4R2HA-M16 kW1280 × 420 × 1040 mm1.35 kg110482 / 110480

Three phase · 380 –⁠ 415 V · 9 kW back‑up heater

Three phase · 380 –⁠ 415 V · 9 kW back‑up heater
SKUModelOutputUnit size
W × D × H
R290 charge
A1022ACHP-H08/5R2HA-M8 kW1280 × 420 × 1040 mm0.85 kg
A1023ACHP-H10/5R2HA-M10 kW1280 × 420 × 1040 mm0.85 kg
A1024ACHP-H12/5R2HA-M12 kW1280 × 420 × 1040 mm1.35 kg
A1025ACHP-H14/5R2HA-M14 kW1280 × 420 × 1040 mm1.35 kg
A1026ACHP-H16/5R2HA-M16 kW1280 × 420 × 1040 mm1.35 kg

Order by SKU and quote the model reference for technical or warranty enquiries.

System design

Design figures for the installer

Design flow temperatures

Underfloor heating
30 –⁠ 35 °C
Fan coil units
30 –⁠ 45 °C
Radiators
40 –⁠ 50 °C
HW cylinder
50 –⁠ 55 °C
Cooling, fan coil units
7 –⁠ 18 °C
Cooling, floor
18 –⁠ 25 °C

Recommended HW cylinder volume

4 –⁠ 6 kW
100 –⁠ 250 litres
8 –⁠ 10 kW
150 –⁠ 300 litres
12 –⁠ 16 kW
200 –⁠ 500 litres

Supplied with every unit

Controller
Wired, with app control available
Strainer
Built in
Expansion vessel
5 litres, 1.0 bar pre‑charge
Weather compensation
Standard
Anti-freeze protection
Standard
Dual-zone control
Option

Commercial range

22 kW to 40 kW three-phase monobloc

A twin-fan monobloc for commercial buildings, multi-dwelling schemes, schools and larger off‑gas properties. Up to eight units can be cascaded, giving a combined output of up to 320 kW with 40 kW units.

Three phase · 380 –⁠ 415 V · 9 kW back‑up heater · wired colour controller

Commercial R290 monobloc range
SKUModelOutputEnergy class
35 / 55 °C
A1027ACHM-H22/5R2A22 kWA+++ / A+++
A1028ACHM-H26/5R2A26 kWA+++ / A+++
A1029ACHM-H30/5R2A30 kWA+++ / A+++
A1030ACHM-H35/5R2A35 kWA+++ / A+++
A1031ACHM-H40/5R2A40 kWA+++ / A+++

Cascade and buffer

Units in cascade
Up to 8
Buffer
Common buffer tank
Sensor
Single buffer sensor

Operating range · outlet water

Heating
+30 to +85 °C
Domestic hot water
+30 to +75 °C
Cooling
+5 to +25 °C

Operating range · outside air

Heating
−30 to +43 °C
Domestic hot water
−30 to +43 °C
Cooling
−15 to +48 °C

Controls and integrations

Connects to the controls you already use

  • Native Modbus

    RS485 Modbus with a documented register map, so third-party controls and building management systems connect directly, without a gateway or adapter.

  • Passiv UK

    The AUX R290 monobloc is a supported model on Passiv smart heat pump control, with its own installation guide and commissioning notes.

  • Adia Thermal

    A pre‑plumbed hydraulic hub with room-by-room load compensation and a built‑in heat meter, connected to the heat pump over Modbus.

FAQs

Frequently asked questions

Quick answers about the AUX R290 monobloc heat pump for homeowners and installers.

The R290 monobloc

What sizes does the AUX R290 monobloc heat pump come in?

Domestic models run from 4 kW to 16 kW: seven single-phase outputs from 4 kW to 16 kW and five three-phase outputs from 8 kW to 16 kW. For commercial buildings there is a twin-fan, three-phase monobloc from 22 kW to 40 kW, and up to eight units can be cascaded on one system. The SKUs are in the domestic range and commercial range tables.

Can the R290 heat pump work with radiators?

Yes. It is built for UK radiators, underfloor heating and fan coil units, and supplies water up to 80 °C, held down to −10 °C outside. Typical design flow temperatures are 40 –⁠ 50 °C for radiators, 30 –⁠ 35 °C for underfloor heating and 30 –⁠ 45 °C for fan coil units.

Does the AUX R290 heat pump qualify for the Boiler Upgrade Scheme?

Yes. Every domestic model is MCS certified and listed in the Product Characteristics Database at 35 °C and 55 °C, so installations by an MCS‑certified installer qualify for the Boiler Upgrade Scheme grant of up to £7,500. Who is eligible and how the grant works is explained on the homeowner page.

Why does it use R290 refrigerant?

R290 is a natural refrigerant with a global warming potential of 3. In a monobloc the sealed refrigerant circuit stays inside the outdoor unit, so the installer makes water-side connections only.

Installation and support

How loud is the R290 outdoor unit?

Inverter compressors, triple insulation and the AUX patented fan design bring noise down to 35 dB(A) at 3 m. A silent mode adds two quieter levels.

Which heating controls can it connect to?

The unit has native RS485 Modbus with a documented register map, so Passiv UK and Adia Thermal controls, and building management systems, connect without an adapter. A wired controller is supplied with every unit, and app control is available.

Is there a warranty on AUX heat pumps?

Yes. AUX heat pumps supplied by AUX UK and installed in UK homes have a 10‑year product warranty from the date of commissioning. To keep the full term, register within 90 days of commissioning and have the heat pump serviced every year by an MCS‑certified company. The steps are on the warranty page.

10‑year product warranty

Every AUX heat pump supplied by AUX UK is covered from the date of commissioning and supported by our own technical team in the UK.