Sometimes, particularly where renovation work provides access. Existing finished homes need a detailed inspection because compact ducts still require continuous routes and serviceable equipment.

Outdoor plant is not placed on a standard basis. Visibility, setbacks, noise, approvals and available private space all influence the location.

Yes, zoning may separate it from the original rooms when the heat-load and airflow design support that arrangement.

New construction can sometimes provide useful distribution and plant space, with smaller routes extending toward retained rooms. Whether this works depends on distance, structure, available cavities and the airflow required in each area.

Possible routes and outlet positions are assessed against the ceiling and wall details that must remain. A site inspection is needed because room dimensions alone do not reveal the available service path.