The SWP heat pump uses the thermal energy of the air to produce domestic hot water. The machine is designed for indoor installation only. It works with R134a gas. The process takes place in the most effective and profitable way, offering very high average efficiency levels. The condenser is on the outside of the boiler, so it’s not subject to scaling or refrigerant-water liquid contamination. The energy advantage of the SWP heat pumps therefore helps safeguard the environment, using mainly energy from solar irradiation when used in combination with thermal solar panels. The ease of installation, silent and reliable operation and very low maintenance requirements complete the advantages of this highly ecological and economic system.