Heat pump apparatus module

A heat pump apparatus module for heating and/or cooling supply water, said heat pump apparatus module comprising:

• an apparatus housing being at least partly provided with an outer wall;
• a heat pump arrangement comprising a condenser, an evaporator, and a compressor arranged between said condenser and said evaporator, said compressor being configured to transfer a heat transferring medium from said evaporator to said condenser;
• wherein said heat pump apparatus module is divided into at least two separate compartments being:
• an air-flow compartment comprising a first heat pump component being either the condenser or the evaporator, and being configured to allow air to flow through said air-flow compartment, said first heat pump component being configured to utilize said air for heating or cooling said heat transferring medium;
• a first closeable compartment being accessible through a first closeable opening, and
• wherein said air-flow compartment comprises an air-take portion and an air-outlet portion, configured such that air flowing through said air-flow compartment is brought into contact with said first heat pump component, said heat pump apparatus module further comprising an air-recirculation reducing arrangement configured to prevent or at least reduce, outlet air from the air-outlet portion to be mixed with inlet air in the air-intake portion.