Wood Fired Coil Kit
Wood Fired Coil Kit
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Wood Fired Hot Tub Coil Kit
The Coil Kit converts your own tub into a wood fired hot tub. Everything is included for quick and easy DIY installation; all you need is a power drill and the tub.
Powerful Heating Performance
The Coil Kit is powerful and efficient for quick heating times.
Average Heating Time to 40C (104F):
500L Uninsulated tub - 1.5 hours
800L Uninsulated tub - 2 hours
1,000L Insulated tub - 1.5 hours
1,500L Insulated tub - 2.5 hours
2,000L Insulated tub - 3 hours
No Electricity Needed! But How?
Our system runs on a natural flow called thermosyphon — no pump, no wires.
As fire heats the water inside the coil, hot water rises out the top and flows back into the tub.
At the same time, cold water from the bottom of the tub gets pulled into the coil to be heated.
This creates a steady, silent cycle powered only by fire and gravity.
Quick and Easy Installation
Installation takes about 20 minutes. It's a quick and easy DIY project; the only tool needed is a power drill. Just drill two holes, mount the wall ports, and hook up the hoses. Now you're ready to soak.
BBQ Grill Functionality
Place a grill, hot plate, or large wok over the coil to enjoy flame grilled food while the tub heats up.
What's Included
Customer Reviews
Fantastic craftsmanship I'm turning one of my old cold tub into a hot tub
I bought this kit with relatively low expectations. There's so much garbage online anymore and it's hard to know if something like this would actually work. I'm pleased to say we've enjoyed many relaxing soaks in what I affectionately call our redneck hot tub at our cabin in Alaska . It's connected to a 300 gallon Rubbermaid stock tank I picked up from Grainger. It takes a while to heat up that much water, but it also stays warm for a while too. There was a small dent in the coil at the weld joint, but it's held up just fine. It heats up faster if you can circulate the water through the coil somehow, so if you have access to power, find a pump you can use to accelerate the heating process. We also use a filter with UV light to keep the bugs down. We only keep it full for a few days at a time before emptying it and cleaning it out. Super happy with my purchase.
The title really says it all... the website faq says it takes 1-3 to process. It took much more than that. I emailed them and got a response (a few days later) and my order was processed after the email.
The product however is amazing, really well built conectors, and the coils works well for a stock tank hottub.
Hi Gabriel — thanks for the honest feedback and the five star rating.
You’re right about the delay. The week your order came in, we paused dispatch to update the manual included with every kit, yours included. That hold up ran longer than planned, and I’m sorry it kept you waiting.
Orders normally leave our warehouse within the 1–3 day window. Going forward, if we anticipate any slowdown, we’ll post a notice at checkout and in the FAQ's so customers know before they order.
Great to hear you’ve already put the Coil Kit to work with your DIY wood fired hot tub. If you have any questions, or want to share a photo of your setup; we’d love to see it.
Thanks again for your patience and support.
Mateo
Founder | Salty Barrel
Good materials, simple, efficient, very pleased overall
We live very cold place with lots wood, I can heat my spa up faster than an electric heat pump.
Love it so simple
PS I built a heater out copper pipe 1st off, worked well, all our hair went green all over our body as my spa is connected to the pool it tripple the size off bath, salt and copper not good mix, one off my many mistakes running a
Permaculture Home Stead.
