Yes, it is possible to convert a natural gas space heater to propane, but it requires specific knowledge, tools, and components. The conversion process involves changing the orifice size and pressure regulator to accommodate the different flow rates of propane compared to natural gas. A conversion kit, such as the one offered by Mr. Heater, can simplify the process for 300,000 and 400,000 BTU unit heaters.
Understanding the Conversion Process
When converting a natural gas space heater to propane, it’s crucial to consider the following technical specifications:
Orifice Size
The orifice, a small piece that regulates gas flow, needs to be drilled out to a larger size to accommodate the higher energy density of propane compared to natural gas. The specific orifice size required will depend on the BTU rating of the heater. For example, a 25,000 BTU natural gas heater may require a 0.018-inch orifice, while the same heater converted to propane may require a 0.011-inch orifice.
Pressure Regulator
A different pressure regulator is required to handle the different pressures of propane and natural gas. Natural gas typically operates at a pressure of 7-14 inches of water column (WC), while propane operates at a pressure of 11-14 inches WC. Using the wrong pressure regulator can lead to improper gas flow and potentially dangerous conditions.
BTU Rating
The BTU rating of the heater must be considered when determining the appropriate orifice size and pressure regulator for the conversion. Heaters with higher BTU ratings will require larger orifices and higher-capacity pressure regulators to ensure proper gas flow and combustion.
Conversion Kits and DIY Approach
A DIY approach to converting a natural gas space heater to propane is possible, but it requires a good understanding of the appliance’s design and the necessary modifications. Conversion kits, such as the one offered by Mr. Heater, can simplify the process by providing the necessary components and step-by-step instructions.
Conversion Kits
Conversion kits typically include the following components:
- Orifice(s) of the appropriate size for the heater’s BTU rating
- Pressure regulator designed for propane operation
- Instructions for the conversion process
These kits are designed to work with specific models of natural gas space heaters, ensuring a proper fit and compatibility.
DIY Approach
For those with a good understanding of gas appliance design and modification, a DIY approach to converting a natural gas space heater to propane is also possible. This approach requires sourcing the appropriate orifice and pressure regulator components, as well as carefully following the necessary steps to ensure a safe and effective conversion.
Videos like the one from Planet Mojo provide step-by-step instructions on converting a natural gas garage heater to propane, including details on orifice size selection, pressure regulator installation, and testing the converted appliance.
Considerations and Safety
When converting a natural gas space heater to propane, it’s essential to follow all manufacturer instructions and local building codes and regulations. Improper conversion can lead to dangerous gas leaks, improper combustion, and potential safety hazards.
It’s also important to ensure that the converted heater is properly labeled to indicate the use of propane, and that the appropriate safety features, such as an oxygen depletion sensor (ODS), are functioning correctly.
Conclusion
In summary, while converting a natural gas space heater to propane is possible, it requires careful consideration of the appliance’s design and specific components. A conversion kit can simplify the process, but a DIY approach also has potential, provided the individual has the necessary knowledge and tools. Regardless of the approach, it’s crucial to follow all safety guidelines and local regulations to ensure a safe and effective conversion.