DREO Whole Room Heater 714 $100 Combining power and safety, this space heater may just be the best space heater on the market today. $100 at Amazon$100 at DREOWhat is the DREO Whole Room Heater 714? Below, check out a full breakdown of my favorite features of the DREO Whole Room Heater 714. Is the DREO Whole Room Heater 714 worth it? DREO’s Whole Room Heater 714 is truly in a league of its own, so if you’re looking for a safe, powerful and quiet space heater (wrapped up in a chic, compact design), you’ve found your match.