Just because you have a Napoleon Gas grill does not mean you cannot cook with charcoal! Using a charcoal tray you can charcoal to cook and sear you food without having to buy another grill.
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How to Cook with Charcoal on Napoleon Gas Grill

Just because you have a Napoleon Gas grill does not mean you cannot cook with charcoal! Using a charcoal tray you can charcoal to cook and sear you food without having to buy another grill.
source