The Wood Fired Coil Kit
Base Price :
$950 AUD
Product Description:
Wood-Fired Hot Tub Coil Kit - $950 AUD
Turn any drillable tub into a wood-fired hot tub — no power needed
The Wood-Fired Coil Kit uses a natural thermosyphon flow to heat your water fast — no pump, no electricity. It’s a simple DIY fit: drill two holes, fit the ports, connect the hoses, light the fire, and soak.
What's Included:
Stainless steel heating coil
Fire-resistant hoses (high-temp rated)
Universal through-wall ports (inlet & outlet)
Quick-connect fittings (easy on/off)
Water thermometer
Lifetime warranty
What's Not Included:
A tub (works with stock tanks and other drillable tubs)
Firewood
Power drill (to drill the two wall holes for the ports)
How It Works
As the fire heats water inside the coil, hot water rises out of the top hose back into the tub. At the same time, cooler water is drawn from the bottom of the tub into the coil to be heated. This creates a steady, silent cycle powered by fire + gravity — no wires, no pump.
Quick & easy installation (about 20 minutes)
Mark & drill two holes in your tub wall (template included).
Fit the ports and tighten the seals.
Connect hoses with the quick-connects.
Fill with water, then light your fire under/around the coil.
Watch your thermometer and enjoy the soak.
Tip: Using an insulated/lockable cover while heating speeds things up and holds temperature longer.
Real-world heating times (to ~40 °C / 104 °F)*
500 L uninsulated tub: ~1.5 hr
800 L uninsulated tub: ~2 hr
1,000 L insulated tub: ~1.5 hr
1,500 L insulated tub: ~2.5 hr
2,000 L insulated tub: ~3 hr
*Actual times vary with air temp, wind, wood quality, lid use, and starting water temperature.
Compatibility & good-to-know
Works with galvanized steel stock tanks and other rigid tubs you can drill.
Not designed for thin inflatable tubs or surfaces you can’t safely drill.
For outdoor use only; keep children and pets well supervised around open flame and hot surfaces.
Always check local fire restrictions before use.
FAQs
Does it need electricity?
No. The coil runs on thermosyphon (natural hot-water rise). No pump or power needed.
How hot can it get?
Hot-tub temp is typically 37–40 °C. Use the included thermometer and a cover to maintain heat.
Can I install it myself?
Yes. If you’re comfortable drilling two holes and tightening fittings, it’s a straightforward DIY.
Will it fit my tub?
If your tub wall can be safely drilled and sealed for the included ports, you’re good. (Stock tanks are ideal.)
Is there a warranty?
Yes — lifetime warranty on the coil kit. (Normal fire safety and proper use apply.)
Ready to build your recovery ritual?
Message us by clicking on Get Quote or message our team with any questions — we’re happy to help.
