QuadraFire. The industry’s first pellet fireplace, the Edge 60, is one of several of the maker’s units that qualifies for tax credits under the American Recovery and Reinvestment Act of 2009. Delivering 60,000 BTUs, the Edge 60 can warm up to 2,500 square feet of living space. Advanced Energy multi-fuel pellet technology allows homeowners to use a range of fuel pellets, such as wood, grass, corn, or wheat, in the 120-pound hopper. A programmable thermostat regulates heat output. 800.926.4356. www.quadrafire.com.