Rather than simply heating the air, the umbrella heater by Dimplex uses a radiant-heating element to warm people on cool nights. The fully enclosed, steel-sheathed element produces up to 4,265 Btu of heat instantly. Its weatherproof design makes it safe for year-round operation, and its 120-volt plug makes it simple to use in any space. Contact: (800) 668-6663 or www.dimplex.com.