A dry herb vaporizer is different from an E-liquid vape. They both heat a form of CBD. A vaporizer is built to vaporize raw hemp or marijuana flower instead of CBD concentrates or vape oils by design. These vaporizers have a heating element and a chamber to hold the dried hemp flower. The chamber heats and vaporizes the active cannabinoids, terpenes, and other volatile compounds in the hemp but without burning it.
Hemp flower combusts at 451 degrees Fahrenheit. The dry herb vaporizers heat the hemp flower to a much lower temperature and avoid burning the flower.
Most vapes run at a temperature between 355 degrees and 420 degrees Fahrenheit, causing combustion. This process makes various toxic and carcinogenic compounds like nitrogen dioxide, sulfur dioxide, hydrocarbons, and carbon monoxide. These are the elements you hear of that make smoking so harmful to your health.