Furnaces Save on your primary heating costs and tap into your hot air system with a pellet furnace. PSG’s Caddy Alterna is a multi-fuel furnace that can deliver supplemental heat to a 2,500 sq. ft. area. What’s New! Enviro Forgeworks Fronts Mendota Birch log set and more! Hearthstone NEW Barn Red Enamel Napoleon Patioflames and Firepits Ironhaus Doors and Fireplace Fronts Like Us on Facebook!