That's where an indoor grill comes into play. Indoor grills come in two different types: open grills and contact grills. Open grills are like a mini version of regular, outdoor ones—they have an open grilling surface. Heat: If you can, it's always better to opt for an indoor grill with an adjustable heat range, rather than one without a dial or button. With all of that in mind, here are the best indoor grills to make barbecue season last all year long.