The ground source heat pump in a greenhouse may have either a closed or an open loop water system depending on the terrain and soil composition; if a pond or other consistent water source is available the system may be able to utilize that, water is good conductor of heat and cool.

A closed loop system for a ground source heat pump in a greenhouse will have pipes running from the condenser unit, into the ground, then back to the condenser unit; inside the pipes there is some sort of refrigerant depending on the exact model, which is heated or cooled by the ground (or water depending on the case) and the heated refrigerant heats the air inside the condenser unit as it circulates, which the fan is able to disperse within the greenhouse.

An open loop ground source heat pump in a greenhouse will also circulate pipes full of refrigerant to heat or cool the air within the greenhouse; the difference between the systems is the presence of moving water. A moving body of water is able to heat or cool the pipes in the water with a renewing source rather than a stagnant source of water; air can even be used to heat or cool the pipes of refrigeration in some cases.

In a greenhouse, a ground source heat pump will help keep plants at a comfortable temperature until spring returns or it can be reversed to keep an overheating greenhouse cool if temperatures get too hot.

A ground source heat pump in greenhouses make sense because the 70? air combined with the intensified heat of the sun by the greenhouse panels create a warm environment to grow fruits, vegetables, herbs, flowers, and other foliage. Furthermore the panels of a greenhouse make the most of the available sunlight by dispersing it evenly to the entire greenhouse.

Ground source heat pumps in greenhouses can be solar powered to make the entire greenhouse self sufficient; because the whole idea of using a greenhouse is to trap solar energy, adding enough solar panels to run the condenser unit and pump of the ground source heat pump in the greenhouse is practical.