{"product_id":"large-biochar-making-fire-pit","title":"Large Biochar-Making Fire Pit","description":"\u003cp\u003e\u003cstrong\u003eThe Biochar-Making Fire Pit, scaled up for a landowner with more prunings than a backyard fire pit can keep up with.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis is the same flame-cap kiln as our 24-inch fire pit, about eight times the volume: a hexagonal cone 48 inches across the rim and 25 inches deep, in 11 gauge steel, holding about 90 gallons (340 L) of wood to the rim. Dry prunings, orchard trimmings and clean scrap wood go in a layer at a time; water from the hose puts it out; biochar for your soil comes out. A flame-cap kiln works through about 4 to 8 times its own volume of wood in a batch, so one batch in this fire pit can take care of roughly 2 to 3 cubic yards of dry brush.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBuilt to order.\u003c\/strong\u003e We build each one in our shop in Salem, Oregon, when the order comes in: about five weeks to build, then about a week in transit by freight. The pictures are renderings, not photos. We designed this fire pit for a customer who asked for a larger one, and the first one has not been built yet, so there are no product photos to show; what you see is the model it will be built from. For a sense of how it looks for real, the welds, the steel and the rust patina, have a look at the photos of our \u003ca href=\"\/products\/biochar-making-fire-pit?ref=large-pit-render\"\u003e24-inch Biochar-Making Fire Pit\u003c\/a\u003e: this is the same design and the same shop, scaled up. The photos and videos further down this page show that 24-inch fire pit in use; the large one works the same way, at about eight times the volume.\u003c\/p\u003e\n\u003ch2\u003eA biochar kiln for sale that is sized for acreage, not a city lot\u003c\/h2\u003e\n\u003cp\u003eMost biochar kilns for sale at this size are ring kilns or drum retorts. This one is a Kon-Tiki biochar kiln at heart: a flame-cap cone, open at the top, wide at the rim, with the same bottom-up quench as the small fire pit. It is meant for a small landowner, an orchard, a few acres of woodlot or a market garden with a steady supply of prunings, not commercial volume. If you are looking for a commercial biochar kiln for sale, the \u003ca href=\"\/blogs\/biochar\/biochar-kiln-buyers-guide\"\u003ebuyer's guide\u003c\/a\u003e lists the field-size kilns instead. It is also bigger than most cities allow for a backyard fire pit (many cap open fires at 2 by 2 feet), so check your local rules before you order. Where a fire this size is allowed, it makes far less smoke than a burn pile.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat makes it work\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMakes biochar the same way as the small fire pit:\u003c\/strong\u003e start a fire, add a layer of wood each time the flames die down, and quench from the bottom up through the built-in pipe. Expect roughly eight times the char of the 24-inch fire pit per batch (its range is 2 to 4 gallons); how much you get depends on how dry the wood is and when you quench.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRemovable handles:\u003c\/strong\u003e four 1-inch steel pipe handles slide into welded sockets and lock with a pin and keeper, so two people can move it when it is cold. Pull them out for the fire and for shipping.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e11 gauge steel:\u003c\/strong\u003e about 1\/8 inch, twice the thickness of the small fire pit, for a fire that runs a lot hotter and a lot longer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBottom-up quench:\u003c\/strong\u003e a brass fitting for a standard 3\/4-inch garden hose. A 90-gallon cone fills in about 10 to 20 minutes on a garden hose, and the water comes up under the char so every piece gets wet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMade in the USA:\u003c\/strong\u003e we build each one in our shop in Salem, Oregon, from US steel.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBare steel:\u003c\/strong\u003e left outside it weathers to a rust patina meant to blend into a field or a garden, the same as the small fire pit.\u003c\/p\u003e\n\u003ch2\u003eHow it ships: freight by region, or pick it up in Salem\u003c\/h2\u003e\n\u003cp\u003eAt about 175 lb it goes by LTL freight, strapped open to a 48 by 48 inch pallet (about 250 lb with the pallet; the pallet is included in the price). At checkout you choose one of two freight rates for your region: pick it up at your nearest freight terminal, which is the least expensive and the most reliable, or liftgate delivery to your home, where the driver lowers the pallet to the ground at the end of your driveway. The rates by region are in the Shipping tab below and show again at checkout. Or pick it up free at our shop in Salem, Oregon: choose Pick up at checkout and we call you to set a time when the build is done. Alaska and Hawaii: email us for a quote before you order.\u003c\/p\u003e\n\u003cp\u003eLearn more about biochar gardening on our \u003ca href=\"\/blogs\/biochar\"\u003eBiochar Blog\u003c\/a\u003e, read \u003ca href=\"\/pages\/the-biochar-making-fire-pit-getting-started\"\u003ehow to make biochar at home\u003c\/a\u003e, or compare a Kon-Tiki kiln, a retort and a TLUD in the \u003ca href=\"\/blogs\/biochar\/biochar-kiln-buyers-guide\"\u003ebiochar kiln buyer's guide\u003c\/a\u003e. For a backyard, the \u003ca href=\"\/products\/biochar-making-fire-pit?ref=large-pit-description\"\u003e24-inch Biochar-Making Fire Pit\u003c\/a\u003e is the small biochar kiln of the two and ships free by ground. Want something smaller? That is the one.\u003c\/p\u003e\n","brand":"Pi Fabricators","offers":[{"title":"Default Title","offer_id":52833149288580,"sku":"PFL20260917","price":1500.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0550\/7186\/7012\/files\/large-biochar-making-fire-pit-rendering.jpg?v=1789651584","url":"https:\/\/pifabricators.com\/products\/large-biochar-making-fire-pit","provider":"Pi Fabricators","version":"1.0","type":"link"}