Air to Water heat pumps

We have a full range of air to water heat pumps from various manufacturers but our primary product is Panasonic Aquarea

Read more about Aquarea here 

Typical piping schematic

Performance data at -3C outdoor temperature with various water temperatures

We have produced a chart to show the performance of the various Aquarea systems at a typical UK outdoor design condition with different water temperatures. This is shown compared to the capacity at nominal conditions which are air at 7C with water flow at 35C and return at 30C.

  • UF Heat 35C refers to water used for Under Floor Heating with Flow at 35C and Return at 30C
  • LT Rad 45C refers to water used with a low temperature radiator or fan coil with Flow at 45C and Return at 30C
  • HT Rad 50C refers to water used with standard radiators with flow at 50C and return at 45C
  • Old Rad 60C refers to an older radiator with flow at 60C and return at 55C using a HT Aquarea system

Monobloc Systems

Standard Monobloc Models

 Model SizeRated KW UF Heat 35C LT Rad 45C HT Rad 50C  Old Rad 60C
 WH-MDF055.0KW 4.6KW 4.5KW 4.4KW N/A 
 WH-MDF066.0KW 5.1KW 5.1KW 5.2KW N/A 
 WH-MDF099.0KW 7.3KW 7.2KW 7.2KW N/A 
 WH-MDF1212.0KW 10.7KW 9.9KW 9.3KW N/A 
 WH-MDF1414.0KW 11.5KW 10.6KW 9.8KW N/A 
 WH-MDF1616.0KW 12.2KW 11.1KW 10.2KW N/A 

TCAP High Efficiency Monobloc Models
 Model SizeRated KW UF Heat 35C LT Rad 45C HT Rad 50C  Old Rad 60C
 WH-MXF099.0KW 9.0KW 9.0KW 9.0KW N/A 
 WH-MXF1212.0KW 12.0KW 12.0KW 12.0KW N/A 

HT High Temperature Monobloc Models

 Model SizeRated KW UF Heat 35C LT Rad 45C HT Rad 50C  Old Rad 60C
 WH-MHF099.0KW 9.0KW 9.0KW 9.0KW 9.0KW
 WH-MHF1212.0KW 12.0KW 11.2KW 10.8KW 10.2KW

Split (Bi-Bloc) Systems

Standard Split Models

 Model SizeRated KW UF Heat 35C LT Rad 45C HT Rad 50C  Old Rad 60C
 WH-SDF033.0KW 3.2KW 3.2KW 3.2KW N/A 
 WH-SDF055.0KW 4.2KW 4.0KW 3.8KW N/A 
 WH-SDF077.0KW 5.9KW 5.8KW 5.6KW N/A 
 WH-SDF099.0KW 7.3KW 7.2KW 7.2KW N/A 
 WH-SDF1212.0KW 10.7KW 9.9KW 9.3KW N/A 
 WH-SDF1414.0KW 11.5KW 10.6KW 19.8KW N/A 
 WH-SDF16 16.0KW12.2KW 11.1KW 10.2KW N/A 

 TCAP High Efficiency Split Models

 Model SizeRated KW UF Heat 35C LT Rad 45C HT Rad 50C  Old Rad 60C
 WH-SXF099.0KW 9.0KW 9.0KW 9.0KW N/A 
 WH-SXF1212.0KW 12.0KW 12.0KW 12.0KW N/A 
 WH-SXC1616.0KW 16.0KW 16.0KW 16.0KW N/A 

HT High Temperature Split Models

 Model SizeRated KW UF Heat 35C LT Rad 45C HT Rad 50C  Old Rad 60C
 WH-SHF099.0KW 9.0KW 9.0KW 9.0KW 9.0KW
 WH-SHF1212.0KW 12.0KW 11.2KW 10.8KW 10.2KW

An Aquarea split system (Bi-Bloc) indoor unit piped according to the diagram at the top of this page, prior to the water pipes being insulated and labelled.

During heating mode the three way valve diverts the water to the low loss header. During hot water mode the three way valve diverts the water to the Domestic Hot Water cylinder.

Note the strainer in the return pipe and the flow measurement device which is normally bypassed.

The system is set up to heat the hot water cylinder, if required, whenever the heating system is not operating. The heating system is controlled from a thermostat connected to the customers iPhone. It has six operating periods every day each with its own set temperature and these vary according to the customers needs. When the thermostat calls for heating then the unit is switched into heating mode, water flow is diverted from the hot water cylinder to the low loss header and the heating circulation pump is activated. The heating circulation pump feeds the radiators which also have their own thermostatic radiator valves and so the amount of water required by the heating system is constantly changing, hence the use of the low loss header which ensures a constant water flow to and from the heat pump regardless of the requirement of the heating system.

The pipes which have already been insulated and go into trunking are the refrigeration pipes that connect this indoor section to the outdoor section which collects the heat from the air outside.