System for conditioning air in a living space

A system for providing air conditioning to a living space and heating potable water, the system comprising:

• a heat pump circuit, and a water circuit,
• the heat pump circuit comprising:
• a compressor for circulating a refrigerant around the heat pump circuit, a first condenser, a second condenser, and an evaporator,
• the evaporator adapted to receive a first flow of air from an air inlet to transfer heat from the first flow of air to the refrigerant,
• the first condenser adapted to receive a flow of water to transfer heat from the refrigerant to the water,
• the second condenser adapted to receive a second flow of air to transfer heat from the refrigerant to the second flow of air, and
• an air outlet to provide the first flow of air from the evaporator to the living space,
• wherein the heat pump circuit comprises:
• a first heat exchanger configurable as the evaporator or the second condenser, a second heat exchanger configurable as the second condenser or the evaporator, and a valve for selecting the direction of flow of refrigerant in the heat pump circuit through the first and second heat exchangers, and wherein the first condenser is located within the heat pump circuit between the compressor and the valve,
• the water circuit comprising:
• a water tank and a pump for pumping water from the tank and through the first condenser to be returned to the tank, and a water circuit heat exchanger for receiving the water from the water circuit and the first flow of air to transfer heat between the water and the first flow of air,
• wherein the water circuit is arranged such that:
• the water circuit heat exchanger and the evaporator, or a first heat exchanger of the heat pump circuit, are arranged in the first flow of air in series, and
• the water circuit heat exchanger is a passive heat exchanger, positioned in the first flow of air upstream of the evaporator, or a first heat exchanger of the heat pump circuit.