So, you're limited in space for a gas range? You are not alone as many city kitchens and tenant apartments have the same requirement. The standard width of a range is 30 inches, but many smaller spaces only allow a 20" or 24" range.
Last week, we updated an article about 24 inch gas ranges. There are many good options for 24" ranges including Bertazzoini, AGA, Fisher &Paykel as well as more basic brands.
My hope is that there would be a better selection for 20" gas ranges as well. However, there are just 6 brands: Danby, Avanti, Amana, Hotpoint, Premier and Summit. They all look the same.