If you live in a house (or work in an office) with large, drafty rooms that don't ever seem to warm up, investing in one of the best space heaters can make a huge difference. Whether it's a basement, bedroom, or an entire studio apartment, there's nothing worse than being uncomfortable (read: freezing) in your own home during the winter.
When shopping for an appliance that's actually going to make a difference in big rooms and hallways, size is the most important factor you're going to want to consider. As a general rule of thumb, the larger the room, the larger the space heater you'll need. It's also vital that you look for a model that has various safety features built right in. Portable heaters that don't attach to the wall, for example, are more likely to topple over, which can be especially dangerous if you have pets or kids. Similarly, every good space heater should automatically turn off if it begins to overheat, otherwise, you could risk starting a fire.
There are a few other things to look for, depending on your personal preferences. If portability is important to you, look up a product's weight before you buy it, though there are many large space heaters that can be moved around as well. If you don't want to move your heater and plan on keeping it in one place, look for one with an oscillating fan to distribute heat.