Look at dryers that have the lint filter on the top of the machine. There are several reasons for that: 1) it is easier to clean the filter, no bending down. 2) the drum is usually larger than the drum where the lint filter is seated just inside of the door of the dryer, so you can dry larger loads. Same space requirements, though. 3) The dryer with the lint filter seated just inside of dryer door turns differently and can melt onto the heating elements. If you turn the dryer off before the cycle is over, the heating element may continue to heat and your dryer will overheat. The appliance repair person told me that it happens frequently, but is not considered a defect by the manufacturers. However, I consider it a defect, and replaced my dryer within a day of the problem occurring.
We don't have natural gas where we live, so I am referring to electric dryers. Have no clue if that applies to natural gas dryers.