If you're looking for an inexpensive portable heater to help keep your home warm this winter, Delonghi's $80 TRH0715T Safeheat 1500W portable oil-filled radiator is the way to go. After 20 hours of research and hands-on testing of 11 different space heaters, it was the offered the best combination of price, energy efficiency and features that I could find. But, if you've got money to burn, Dyson's $400 AM04 Hot fan-forced ceramic heater is a great option too. It's packed with features, safer than anything else I tested and  heated up my test space so much faster than everything else I pitted against it. But before we talk about what you should buy, there's a few other things we need to talk about.

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