A rocket stove burns so efficiently that it ensures almost complete combustion prior to the flames reaching the cooking surface, so there is virtually no smoke. And they're easy to make! Click through (Diy Step Fitness)
rocket stove design that is better suited for indoor use. It does take some getting use to in the sense that if one doesn't stack the wood in properly it smokes back into the house. This also lends to thermal mass heating.
Better Wood Heat: Rocket Mass Heater FAQs Answered – Green Homes
DIY: Rocket Stove Mass Heater - it warms your house for almost nothing! This post has videos & lots of info about these heaters + materials used to build them. You may already have some of the materials.
Build a Simple Solar Air Heater - Renewable Energy