A2W stands for Air to Water and Panasonics A2W brand is called AQUAREA.
An Aquarea system uses the low grade heat in the air outside to economically and efficiently heat water inside which can be used for either domestic hot water purposes or for heating through radiators, fan coils or under floor heating.
Economically? Well lets take a typical 9KW Aquarea TCAP system on a typical day when we are producing water for an under floor heating system at 35C and the air outside is 7C. We use 1.86KW of electricity to power the electrical components in the unit to collect heat from the air outside to give us 9.0KW of water heating. That's a ratio of 4.84 to 1. Magic? Of course not - we don't create energy but use energy to turn low grade heat from outside into something we can use.
But what about when it gets colder? Okay, the same unit is still doing the same job of creating water at 35C for the under floor heating but its got decidedly chilly - lets say 2C, just above freezing. Well we still have 9KW of heat but we need to work a bit harder so the electrical input is now 2.51KW. That's a 3.59 to 1 ratio. We are still using less energy than an electric fire to give the same heat as three of them.
So what when its REALLY cold. Well at -7C we need to use 3.16KW of electricity for the same 9.0KW output. In fact at -15C we still only need 3.51KW to give us 9.0KW of heat.
Okay - explaining some jargon and establishing some rules.
Rule 1 - The higher the water temperature the less efficient the system is, so we need to keep this low
Rule 2 - The colder it gets outside the less efficient the system is
Rule 3 - The hottest water a heat pump can produce is 55C (or 65C for our special HT models)
Rule 4 - A heat pump uses more water flow than a gas or oil boiler so be aware of this
COP - this is the ratio of input power to output. If a 9KW heat pump uses 3KW of electricity then this is a COP of 3.0
Monobloc - This is an all in one design that sits outside with a flow and return pipe to indoors
Split (BiBlock) - This has an outdoor section to collect heat and an indoor boiler section
Panasonics Aquarea is produced in both Monobloc and split models. Why? ideally we don't want to have water outside where it can lose heat or, worse, freeze. To stop it freezing we can use antifreeze and to stop it losing heat we can lag the pipes. But a typical unit will need at least 19mm of insulation, 25mm on longer runs, around a 28mm pipe so this means a pair of 3 inch (ish) diameter pipes running to indoors is required for a monobloc system where all of the mechanical parts are outside. A split system uses much smaller refrigeration pipes (typically 9mm and 15mm diameter with 9mm insulation) to connect to inside but it does need an inside boiler section and there often isn't room for this. Also a Split system needs specialist refrigeration installation engineers. But you have the choice.
Panasonic also have three types of system to choose from - more jargon
Standard High Performance System - Here the unit loses capacity as the temperature gets lower outside. These use standard heat pump technology similar to almost all of our competition.
TCAP System - Here the unit will still do its rated capacity at sub zero conditions (down to at least -7C). TCAP stands for Total Capacity. TCAPs use specialist technology to do this.
HT system - Similar to a TCAP but producing water at up to 65C. HT stands for High Temperature. HT systems use very specialist technology to do this.
Aquarea Standard monobloc systems are available from 5 up to 16KW heat output.
Aquarea Standard split systems are available from 3KW up to 16KW heat output
Aquarea TCAP monobloc systems are available from 9KW up to 12KW heat output
Aquarea TCAP split systems are available from 9KW up to 16KW heat output
Aquarea HT systems both monobloc and split are available from 9KW to 12KW heat output.
For much more information on all things Aquarea please visit our Medal Heating sister website.
1a - Monobloc Aquarea system - one unit outside with a flow and return pipe to indoors
1b - Split system - indoor boiler section with an outdoor heat collection unit linked by refrigeration pipes
2 - Control Thermostat - we have stand alone and smartphone models available
3 - Under floor Heating
4 - Domestic hot water cylinder
5 - Radiator or fan coil
6 - Optional Solar PV system
The above shows just one example of a potential Aquarea system. But really the possibilities are endless. It is also easy to link multiple Aquarea systems together with one another or other sources of heat. Contact us and we can help you get your perfect Aquarea system,.