If you own a propane Blackstone griddle, you should always use it outside. Griddle ranges with use gas instead of electricity are not designed for indoor use. Any griddle of this type, especially larger models, requires a lot of powerful ventilation and fireproof surroundings.
A fuel supply system found on a typical griddle can malfunction and result in gas leakages, while the process of burning propane produces carbon monoxide that can build up over time, creating dangerous and toxic conditions.
Griddles are also extremely powerful in terms of heat output, so they are much too hazardous to be used indoors. If you are set on cooking on a griddle inside your home, it’s best to purchase an electric griddle plate for your kitchen. It’s safe and effective for grilling small batches of food while also requiring less maintenance.