Air source heaters are designed for use in homes that have space for outdoor units, such as single family homes. The perfect combination would be to use a low temperature heating system, such as underfloor heating, and thermal solar panel systems.
How do air source heat pumps work?
The key to aerothermal heating products It is the heat pump. The air, even at low temperature, contains energy absorbed by the refrigerant circulating in the circuit between the outdoor and indoor units.
The outdoor unit acts as an evaporator (gives cold to the environment) in winter; the indoor unit acts as a condenser, transferring heat to the water in the heating circuit.
Energy efficiency of aerothermal systems.
Air source heat pumps have high performance. The maximum COP (coefficient of performance) is around 4 or 5, depending on the manufacturer. This means that for each electric kWh consumed, the aerothermal equipment can produce 4 to 5 kWh of heat under ideal operating conditions. In addition, up to 75% comes from renewable energies (outdoor air) and only about 25% of electricity consumption (fan and compressor).
The systems are guaranteed to work even at -20 ° C. In the event that they cannot provide the correct temperature, they integrate an automatic assistance team.
They can also work in combination with boilers, usually condensing. Like all heat pumps, the Aerotermia is an ideal system for temperate climates, as its performance decreases as the outside temperature decreases.
At lower flow temperatures and higher outdoor temperatures, the COP increases. With flow temperatures of 30 ° C (corresponding to a heated floor in operating mode) and an outside temperature between 4 and 6 ° C, the COP can reach approximately 3.80 to 4.40. On the contrary, with a lower outside temperature, the COP decreases, although it can remain at a value of 2 even at very low temperatures.
Energy saving thanks to aerothermal energy.
An aerothermal system allows considerable energy savings compared to conventional heating systems, although this depends on the climatic conditions of the area and the heating system.
Savings of up to 50% can be achieved by using underfloor heating systems, and up to 20% by heating with radiators, compared to a conventional boiler system using diesel fuel. The repayment period varies from 2 to 3 years. In combination with solar thermal energy, excellent results can be obtained.
Installation of an outdoor unit (affects aesthetics and generates noise).
In colder climatic zones, the seasonal yield is reduced, so it is advisable to carry out a thorough economic analysis before investing.
It is advisable to have a low temperature heating system, such as underfloor heating or efficient radiators.
Advantages of aerothermal energy.
- High efficiency and low operating costs.
- Simple installation.
- Maximum savings with low temperature heating systems (underfloor heating or low temperature radiators).
- Adaptable to existing installations.
- It is possible to obtain cool air conditioning in summer by reversing the cycle.
- Clean energy, low CO2 emissions.
- It requires little space, it is the ideal solution if there is no boiler room.
- It does not require a chimney to evacuate the smoke.
- It is recommended in places where the natural gas supply is limited or does not exist.
- The return periods are low or medium.