Fireflow Core Kit

Turn your existing tub into a powerful, wood-fired hot tub.

The Fireflow Core Kit converts your own tub into a fully functioning wood-fired hot tub using efficient natural water circulation. Designed around a high-grade stainless steel heating coil, the system delivers rapid heat-up times, strong thermosiphon flow and long-lasting outdoor durability.

No electricity. No pumps. No complexity.

Just fire, flow and perfectly heated water.

What Makes It Different

Our precision-formed stainless steel coil is engineered for powerful natural circulation. As the fire heats the coil, water flows automatically through the system - creating consistent, efficient heating without moving parts.

Built for outdoor conditions, the coil is corrosion-resistant, robust and designed to withstand repeated high-temperature cycles.

Complete DIY Conversion 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.

No specialist tools. No plumbing experience required.

Included in the Kit

• High-grade stainless steel heating coil

• Heat-resistant inlet and outlet hoses

• Hose clamps and fittings

• Bulkhead connectors

• Installation guide

(You can tweak this list once finalised.)

Designed For

• Timber barrel tubs

• Ice bath conversions

• Stock tanks

• Custom-built tubs

• Off-grid garden setups

Why Wood-Fired?

Wood-fired heating offers a natural, off-grid alternative to electric systems - creating a more atmospheric, sustainable and rewarding outdoor bathing experience.