What is a Heat Pump?

The principle is very similar to the operation of a refrigerator, but only in reverse.

It utilizes the energy latent in the ambient air, and can extract up to 80% of this free energy from the air, to provide enough hot water for a detached house.

With a 303 litres cylinder, it delivers in excess of 500 litres of domestic hot water of up to 40°C.

The beauty about this technology is that the amount of electrical energy required to operate the heat transfer process is far less than the energy used by a conventional electric element.

For example 25°C air temperatures, 70% humidity and 45°C rise of water temperature, the fan and compressor consume 1 kW of electricity to generate 4 kW of heat to the water cylinder.

The energy use is approximately 25% of conventional electric hot water cylinders, saving you 75% off your electric bill, higher air temperatures mean more savings.

With the predicted increase in energy costs and the cutting of greenhouse gas emissions, the WWK 300 makes real sense for you and the environment.

In case a greater volume of hot water is required occasionally, the WWK 300 can also be equipped with a 1.5 kW electric booster heater.

This reduces the heat-up time during times of demand.

How a Heat Pump Works

The heat pump system contains a fan that forces air through an Evaporator

(1). The evaporator contains very cold liquid refrigerant. The heat in the air passes through this evaporator and is absorbed by the refrigerant. The now warm gaseous refrigerant is then circulated in the system via a Compressor

(2). As it goes through the compressor its pressure rises and the temperature increases further. From here it travels to the Condenser

(3). where the heat from what is now a super hot refrigerant is transferred to the water supply tank. The cooled down refrigerant then goes through an Expansion valve

(4), which reduces its pressure cooling further, and the cycle starts again.

• Uses up to 80% of free environmental energy and converts that into useful heat
• The most efficient domestic heat pump available on the market
• Able to operate at temperatures as low as 0°C
• Up to 80% in savings on your normal electric bill, no longer have to worry about rising electric prices
• Works efficiently at night or when cloudy
• Active defrost to keep efficiencies and savings high
• 303 litre storage cylinder
• Long life German steel enameled tank
• Tidy condensate drain
• Very Low heat losses through CFC- free thermal insulation
• Low noise level
• Cheaper to install than solar
• Savings comparable to solar, but with more advantages
• Attractive modern design. Neat wherever its installed
• Outdoor/Indoor installation
• Heat Pump can withstand all weather conditions. e.g. hail, extreme heat or cold, and is wind resistant
• Coated evaporator - corrosion and salt resistant (good for seaside environment)
• One of the best alternatives for a hot water supply system in houses, villas, bungalows, resorts, spas etc.
• Proven German, Stiebel Eltron brand quality