{"product_id":"2940151856140","title":"Types of Burn Chambers for Rocket Mass Heaters","description":"\u003cp\u003eWhat works best? Ever ask yourself that question?\u003cbr\u003eWhen it comes to build a rocket heater have you considered what type of building materials would make for the best burn chamber?\u003cbr\u003eAre you good with brickwork? We weren't.\u003cbr\u003eEver use refractory cement? We hadn't.\u003cbr\u003eWhat do the pros build with? Is there a plug and play type of system?\u003cbr\u003eWell, welcome to our world. Inside this FREE booklet are various versions of burn chambers currently being used by backyard builders as well as the pros.\u003cbr\u003eWritten by Ray \u0026amp; Randi Dudley, authors of \"Lessons from Our Rocket Mass Heater\" and packed with photos, links and resources we take a look at everything from the tried and true brick builds to the cutting edge materials and shapes employed by the innovators and pros. We present the pros and cons plus we talk about things like cost, ease of use and we even look at some unique builds.\u003c\/p\u003e","brand":"Ray Dudley","offers":[{"title":"Default Title","offer_id":47171680927984,"sku":"2940151856140","price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/2940151856140_p0.jpg?v=1764014605","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/2940151856140","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}