Our new fridge I picked up on Craigslist for $25. We tried our best to keep the original icebox, but it did a lousy job. Thin plastic with no built in insulation....a cooler worked better. I just watched until I found a fridge no larger than 19". Still, we did have to do some adjusting to get it to fit in the old icebox area. We have room in the back for ventilation, will trim out the front which will include a vent cover over the top front to still allow air flow from there also.