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! New Décor from Mendota New Osburn Volta New Product Ravelli Roma Pellet Insert Napoleon Rogue Grill Mendota ML39 Linear Fireplace Like Us on Facebook!