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how to construct a pellet stove hot tub without electric power?

We hope that you have had a chance to explore our quaint little community and all that it offers. You may not have discovered our manufacturing sector. Our good friend and fellow entrepreneur, Sky Huddleston and his father Phillip own and operate Liberator Rocket Heater. Our local manufacturing source for pellet stoves. The following is a finding from our research that we are doing for adding a hot tub to our forested haven for families. Yes, families will venture out into our area for a mid-winter adventure that would include a hot tub tucked back into the woods totally off-grid and sustainable using our vast supply of firewood to bring it as an incredible feature to RGM Farms.

While it's not recommended to build your own hot tub heater due to safety concerns, here's a breakdown of a basic non-electric pellet stove hot tub system for informational purposes only:


  • Pellet Stove: A dedicated wood pellet stove designed for outdoor use with a water jacket or coil for heat transfer.

  • Hot Tub: A well-insulated wooden tub or a prefabricated metal tub suitable for high temperatures.

  • Water Circulation System: Pipes and fittings made of copper or a heat-resistant material to circulate water from the tub to the pellet stove and back.

  • Expansion Tank: A closed container to absorb pressure fluctuations caused by water heating.

  • Safety Relief Valve: A valve that automatically releases pressure if it exceeds safe limits.

Here's a simplified explanation of the process:

  1. Fill the Hot Tub: Fill the tub with clean water.

  2. Light the Pellet Stove: Start the pellet stove according to the manufacturer's instructions.

  3. Water Circulation: Water in the hot tub is pumped (through a gravity-fed system or a hand pump if you choose) from the bottom of the tub through pipes to the water jacket or coil of the pellet stove.

  4. Heat Transfer: The hot water jacket or coil heats the circulating water.

  5. Return to Tub: The heated water then flows back into the top of the hot tub, gradually raising the overall water temperature.

  6. Temperature Regulation: You can manually adjust the pellet stove's output or add cooler water to maintain the desired temperature.

  7. Expansion Tank: As the water heats, it expands. The expansion tank accommodates this increase in volume and helps prevent pressure buildup.

  8. Safety Relief Valve: If pressure exceeds safe limits, the safety relief valve will automatically release it.

Important Safety Considerations:

  • Open Flame & Water: Building a hot tub heater from scratch is highly discouraged due to the inherent risks involved with open flames near water. Improper construction could lead to leaks, fires, or even explosions.

  • Material Selection: Using the wrong materials for the hot tub or circulation system could lead to corrosion, leaks, or structural failure at high temperatures.

  • Pressure Management: A poorly designed system could lead to dangerous pressure buildup. A qualified professional can ensure proper safety measures are in place.

For additional planning, we had previously sourced composite deck pricing which came in at $2,345. for a 12 x 12 foot structure, with no roof or sides.


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