The Ultimate Guide to Ducting a Portable Propane Heater

Ducting a portable propane heater can be a complex task, but with the right knowledge and tools, it can be done safely and effectively. This comprehensive guide will walk you through the step-by-step process, providing technical specifications, DIY tips, and references to ensure your project is a success.

Choosing the Right Heater

When selecting a portable propane heater for ducting, it’s crucial to consider the BTU (British Thermal Unit) rating. The BTU rating determines the heating capacity of the unit, and it should be appropriate for the size of the space you’re trying to heat. For example, the Mr. Heater 30,000 BTU Propane Radiant Heater is a popular choice for medium-sized spaces.

In addition to the BTU rating, you’ll need to ensure the heater is compatible with your propane tank and regulator. Check the manufacturer’s specifications to ensure a proper fit.

Installing the Heater

how to duct a portable propane heater

Mounting the portable propane heater on a wall is the next step. Follow the manufacturer’s instructions carefully, as the installation process may vary depending on the model. For instance, the Mr. Heater heater requires a bracket for mounting and comes with the necessary hardware.

Connecting the Propane Tank

To connect the propane tank to the heater, you’ll need a dual regulator kit. This kit includes a hose, regulator, and fittings to reduce the pressure to the appropriate setting for the unit. The minimum inlet gas pressure for most portable propane heaters is 11 inches of water.

When connecting the components, be sure to use pipe thread sealant made specifically for gases to prevent leaks. After the connection is complete, test for leaks using a water and dish soap solution. If bubbles form, you’ll need to repair the leak before proceeding.

Ducting Considerations

While it’s generally not recommended to add ductwork to portable propane heaters, there are specific situations where convection tubing can be used. For example, in a greenhouse setup where the tubing cannot be turned 90 degrees. Always follow the manufacturer’s instructions and safety guidelines when considering any ducting modifications.

Ventilation Requirements

Proper ventilation is crucial when using a portable propane heater in a garage or enclosed space. To ensure adequate airflow, you can raise a door a few inches or open a window a couple of inches. This will help prevent the buildup of harmful gases and ensure the heater operates safely.

Technical Specifications

Here are some key technical specifications to keep in mind when ducting a portable propane heater:

Specification Value
Inlet Gas Pressure (Minimum) 11 inches of water
Service Lines Copper lines with flared fittings are common. Pre-made rubber liquid propane lines can be used for occasional use and shorter runs.
Dual-Tank Hookup Kits These kits can safely connect two LP tanks, reducing the need for multiple connections.
Liquid Propane Gas Valve A ½-inch liquid propane gas valve is typically used, available online or in hardware stores.

DIY Tips

When ducting a portable propane heater, keep the following DIY tips in mind:

  1. Always follow the manufacturer’s instructions for installation and use.
  2. Use pipe thread sealant made especially for gases when connecting gas line piping.
  3. Test for leaks after connecting all components.


  1. How to Install a Propane Heater
  2. Proper Use of Portable Propane Heaters
  3. Adding Ductwork to a Modine Heater
  4. Portable Propane Heater Installation
  5. Portable Propane Heater Safety and Usage

By following the step-by-step instructions, technical specifications, and DIY tips outlined in this guide, you’ll be well on your way to safely and effectively ducting your portable propane heater. Remember to always prioritize safety and follow the manufacturer’s recommendations to ensure a successful project.