How should the Greensource air to air heat pump unit be sited to ensure sufficient airflow and access?

It is important to ensure there is sufficient space for airflow into the unit and enough clearance at the front of the heat pump to stop cold air re-circulation. You also need to ensure that there is adequate access space for service and maintenance

You should try to ensure that the unit is sheltered from high winds and rain as this will improve the unit is efficiency level by lowering the fan power requirement.