Space heating portable devices might be convenient, but they are usually only good for small rooms. Adding flame effects to an already small device is going to result in poor performance. Size limitations is a huge factor when you try to add a second type of technology. Unfortunately, the end result will be a heater that performs badly and fire effects that are disappointing.   Visually speaking, these types of heaters also tend to look very cheap and tacky. Most modern homes will be better off getting a full-size fireplace mantel package.