You must place the AromaPro on a flat surface where it can take full advantage of the natural airflow in the space. If placing on the table top or a shelf, make sure it doesn’t tip. Alternatively, you can wall mount it or connect to the HVAC. If wall mounting the AromaPro, make sure it is secured properly and is at least 6 feet off the ground and 20″ from the ceiling. Refer to the User Manual for more details and how to connect to HVAC (air conditioning and heating system)