Fan Coil Units for Heat Pump Systems

Heating and cooling from a single water circuit, and a natural partner for a heat pump where a low flow temperature would leave radiators undersized.

AUX wall-mounted Q Series fan coil unit
130 mm
slimline floor-standing depth
50 °C
rated heating water temperature on the slim range
4 families
floor, wall, cassette and concealed
18.9 kW
largest cassette heating output

How it works

One water circuit, a fan coil in each room

AUX R290 monobloc air source heat pumpHeat pumpSupplies hot or chilled water
  • AUX floor-standing slim unitFloor-standing slim130 mm deep
  • AUX wall-mounted q series unitWall-mounted Q Series3.50 –⁠ 8.16 kW heating
  • AUX cassette unitCassette4.80 –⁠ 18.90 kW heating
  • AUX concealed m series unitConcealed M Series2.70 –⁠ 18.90 kW heating

Four families

Pick the unit by where it goes in the room

AUX slim floor-standing fan coil unit

Floor-standing slim

A 130 mm deep exposed cabinet that sits where a radiator used to be. 1.30 –⁠ 4.35 kW heating at 50 °C, up to 7.37 kW at 70 °C.

  • Four widths from 757 to 1217 mm, all 579 mm high
  • Cools as well as heats: 0.81 –⁠ 3.45 kW on 7 °C water
  • 170 –⁠ 630 m³/h airflow at maximum fan speed
Floor-standing slim models
SKUModelCooling,
7 °C water
Heating,
50 °C water
Heating,
70 °C water
AirflowSize
W × H × D
A1567AFC-100CO/4A10.81 kW1.30 kW2.18 kW170 m³/h757 × 579 × 132 mm
A1506AFC-200CO/4A11.68 kW2.44 kW4.14 kW340 m³/h947 × 579 × 132 mm
A1568AFC-300CO/4A12.70 kW3.40 kW5.80 kW510 m³/h1217 × 579 × 132 mm
A1505AFC-400CO/4A13.45 kW4.35 kW7.37 kW630 m³/h1217 × 579 × 132 mm

Capacities and airflow at maximum fan speed. DN20 water connections, DN15 drain. Supplied with a remote controller; a wall thermostat is an optional extra and control valves are not included.

AUX wall-mounted Q Series fan coil unit

Wall-mounted Q Series

A high-wall unit in the style of an air conditioning indoor unit, with Wi‑Fi, a three-way valve and a Modbus gateway built in.

  • 2.70 –⁠ 5.41 kW cooling, 3.50 –⁠ 8.16 kW heating on 60 °C water
  • Two body widths: 965 and 1089 mm
  • 492 –⁠ 1,020 m³/h airflow at maximum fan speed
Wall-mounted Q Series models
SKUModelCoolingHeating,
60 °C water
AirflowSize
W × H × D
A1569AFC-200WM/4A(QC)-N2.70 kW3.50 kW492 m³/h965 × 325 × 230 mm
A1570AFC-300WM/4A(QC)-N2.91 kW4.07 kW585 m³/h965 × 325 × 230 mm
A1504AFC-400WM/4A(QC)-N3.81 kW5.42 kW825 m³/h965 × 325 × 230 mm
A1571AFC-500WM/4A(QC)-N4.51 kW6.77 kW862 m³/h1089 × 328 × 227 mm
A1503AFC-600WM/4A(QC)-N5.41 kW8.16 kW1,020 m³/h1089 × 328 × 227 mm

Capacities and airflow at maximum fan speed. G 3/4″ water connections.

AUX four-way cassette fan coil unit

Cassette

Recessed four-way cassettes for suspended ceilings. 4.80 –⁠ 16.25 kW heating and 3.30 –⁠ 10.81 kW cooling on high speed.

  • Two body sizes: 570 mm with a 650 mm panel, 835 mm with a 950 mm panel
  • 250 –⁠ 290 mm deep above the ceiling
  • 510 –⁠ 2,380 m³/h airflow at high fan speed
Cassette models
SKUModelCoolingHeatingAirflowBody size
W × D × H
Panel
A1572AFC-300CA/4BA3.30 kW4.80 kW510 m³/h570 × 570 × 260 mm650 × 650 mm
A1573AFC-400CA/4BA3.90 kW5.80 kW680 m³/h570 × 570 × 260 mm650 × 650 mm
A1574AFC-500CA/4BA4.50 kW6.75 kW850 m³/h570 × 570 × 260 mm650 × 650 mm
A1575AFC-600CA/4BA5.41 kW8.12 kW1,020 m³/h835 × 835 × 250 mm950 × 950 mm
A1502AFC-800CA/4BA7.21 kW10.81 kW1,360 m³/h835 × 835 × 250 mm950 × 950 mm
A1576AFC-1000CA/4BA9.02 kW13.51 kW1,700 m³/h835 × 835 × 290 mm950 × 950 mm
A1577AFC-1200CA/4BA10.81 kW16.25 kW2,040 m³/h835 × 835 × 290 mm950 × 950 mm
A1501AFC-1400CA/4BA12.61 kW18.90 kW2,380 m³/h835 × 835 × 290 mm950 × 950 mm

Capacities and airflow at high fan speed. Rc 3/4″ water connections.

AUX horizontal concealed ducted fan coil unit

Horizontal concealed M Series

Ducted units for ceiling voids and bulkheads, in left-hand or right-hand connection.

  • 1.80 –⁠ 12.60 kW cooling, 2.70 –⁠ 18.90 kW heating on 60 °C water
  • 240 mm high for shallow ceiling voids
  • Nine widths from 694 to 1909 mm
Horizontal concealed M Series models
SKUModelCoolingHeating,
60 °C water
AirflowSize
W × D × H
A1578AFC-200HCL(R)/4BA6M1.80 kW2.70 kW340 m³/h694 × 518 × 240 mm
A1579AFC-300HCL(R)/4BA6M2.70 kW4.05 kW510 m³/h894 × 518 × 240 mm
A1580AFC-400HCL(R)/4BA6M3.60 kW5.40 kW680 m³/h894 × 518 × 240 mm
A1581AFC-500HCL(R)/4BA6M4.50 kW6.75 kW850 m³/h1039 × 518 × 240 mm
A1582AFC-600HCL(R)/4BA6M5.40 kW8.10 kW1,020 m³/h1129 × 518 × 240 mm
A1583AFC-800HCL(R)/4BA6M7.20 kW10.80 kW1,360 m³/h1319 × 518 × 240 mm
A1584AFC-1000HCL(R)/4BA6M9.00 kW13.50 kW1,700 m³/h1719 × 518 × 240 mm
A1585AFC-1200HCL(R)/4BA6M10.80 kW16.20 kW2,040 m³/h1719 × 518 × 240 mm
A1586AFC-1400HCL(R)/4BA6M12.60 kW18.90 kW2,380 m³/h1909 × 518 × 240 mm

External static pressure 30 Pa as standard, 12 Pa optional. Cooling rated at 7 / 12 °C water. Rc 3/4″ (DN20) water connections.

Sizing

Size on the 50 °C figure

Where fan coils are served by a heat pump, size on the 50 °C heating figure unless the system design confirms a higher flow temperature.

30 –⁠ 45 °C
recommended heating flow temperature for fan coil units
7 –⁠ 18 °C
recommended cooling flow temperature for fan coil units

FAQs

Frequently asked questions

Quick answers about using AUX fan coil units with a heat pump.

Fan coils and heat pumps

Why use fan coil units with a heat pump?

Fan coil units heat and cool from a single water circuit. They are a natural partner for a heat pump where a low flow temperature would leave radiators undersized.

What flow temperature should fan coil units be designed for?

The recommended heating flow temperature is 30 –⁠ 45 °C and the cooling flow temperature 7 –⁠ 18 °C. Where fan coils are served by a heat pump, size them on the 50 °C heating figure unless the system design confirms a higher flow temperature.

Can fan coil units cool as well as heat?

Yes. Every family cools on chilled water as well as heating. For example, the slim floor-standing units give 0.81 –⁠ 3.45 kW of cooling on 7 °C water, and the wall-mounted Q Series 2.70 –⁠ 5.41 kW.

Choosing a unit

Which type of fan coil unit should I choose?

Choose by where it goes in the room. The slim floor-standing unit is 130 mm deep and sits where a radiator used to be. The wall-mounted Q Series is a high-wall unit. Cassettes are recessed into a suspended ceiling. The concealed M Series fits ceiling voids and bulkheads, at 240 mm high.

Are controls and valves included?

The slim floor-standing units come with a remote controller; a wall thermostat is an optional extra and control valves are not included. The wall-mounted Q Series has Wi‑Fi, a three-way valve and a Modbus gateway built in.

Can AUX UK size fan coil units for my heat pump?

Yes. Send us the room loads and the design flow temperature and our technical team will select the units. Contact us or call 0345 257 7387.

Need fan coils sized for a heat pump?

Send us the room loads and design flow temperature and our technical team will select the units.