Because these usually run on gasoline, they are extremely dangerous since they can produce carbon monoxide (CO). Because of that, never run these indoors or in an enclosed space and always keep them at least 20 feet from your home when operating them. Additionally, do not use them in damp or wet conditions. Some newer models feature a built-in CO sensor that triggers an automatic shut-off feature if it detects CO buildup. Other advanced models are designed to emit less poisonous fumes; both of these safety features help to save lives. Prices range from $400 to $1,000.
