{"product_id":"off-grid-wood-fired-coil-kit","title":"The Off-Grid Wood Fired Coil Kit","description":"\u003cp\u003e\u003cstrong\u003eThis isn't a heater you plug in. It's wood, water, and a coil — light a fire, heat your tub, soak.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe Wood Fire Coil Kit is a stainless steel thermosyphon coil with hoses, port fittings, and a floating thermometer that turns any drillable rigid tub into a wood-fired hot tub. No electricity. No pump. No plumbing. The coil does the heating; you bring the tub and the firewood.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy people choose wood over power\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA powered spa costs $300–600 a month to keep hot and ties you to a covered outdoor power point. An electric tub heater is similar. A heat pump trims the running cost but adds $4,000+ to the install and still needs power. The Wood Fire Coil Kit is the opposite. You light a small fire under or beside the coil, the water heats through gravity-fed convection — hot water rises out of the coil, cool water flows in to be reheated — and a small ongoing fire holds the temperature for as long as you want to soak.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRunning cost\u003c\/strong\u003e: a few dollars of dry hardwood per session, or free if you've got a wood pile. It's the version that works on a rural block, at a beach house, or in any backyard that doesn't have — and doesn't want — a covered power point.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAt a Glance\u003c\/strong\u003e\u003cbr\u003e- Stainless steel heating coil — 30cm tall × 43cm wide\u003cbr\u003e- Two flexible high-temperature hoses — ~90cm each, can be cut to fit your tub's geometry\u003cbr\u003e- Two through-tank port fittings — inlet + outlet, for 52mm pre-drilled openings\u003cbr\u003e- Quick-connect couplers — for fast disconnect\/reconnect between sessions\u003cbr\u003e- Four hose clamps and seals\u003cbr\u003e- Floating water thermometer\u003cbr\u003e- Heats by gravity-fed thermosyphon — no power, no pump, no plumbing\u003cbr\u003e- Use a 48mm hole saw for holes. \u003cbr\u003e- Compatible with galvanised stock tanks (ideal), rigid steel hot tubs, and hardwood barrel tubs (with port lining); not suitable for inflatables, plastic IBC totes, or thin-walled bathtubs\u003cbr\u003e- Heat-up: 2–4 hours on a 500L tub with the cover on; longer for larger volumes or less-insulated tubs\u003cbr\u003e- DIY install: ~30 minutes onto a pre-drilled tub; ~60 minutes from scratch (drill, fit, connect, fill, light)\u003c\/p\u003e\n\u003cp\u003eWhere it can — and can't — go\u003c\/p\u003e\n\u003cp\u003eThe Wood Fire Coil Kit produces an open fire while in use. The tub it's heating must be placed on a non-combustible surface: compacted cracker dust, gravel, concrete, stone pavers, natural earth, or slate. It cannot be placed on a timber deck, decking timber, decking composite, artificial turf, or any combustible surface, without a proper fire-resistant base and container. The kit doesn't include a fire enclosure — most customers build a simple firebrick ring under the coil, use a steel fire pit insert, or burn in an existing backyard fire pit. See the FAQs below for clearance distances.\u003c\/p\u003e","brand":"Terra Tanks","offers":[{"title":"Default Title","offer_id":45486620246207,"sku":null,"price":950.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0739\/9820\/5119\/files\/terra-tanks-off-grid-wood-fired-coil-kit-installed-outdoors-0.png?v=1778108963","url":"https:\/\/terratanks.com.au\/products\/off-grid-wood-fired-coil-kit","provider":"Terra Tanks Australia","version":"1.0","type":"link"}