Can You Convert a Propane Patio Heater to Natural Gas?

Yes, propane patio heaters can often be converted to natural gas with a conversion kit, but it’s essential to follow manufacturer guidelines for safety.

Many homeowners wonder if they can switch their propane patio heaters to natural gas. The short answer is yes, but it requires proper conversion kits and safety precautions. This guide covers everything you need to know about converting propane heaters to natural gas.

How Propane to Natural Gas Conversion Works

Converting a propane patio heater to natural gas involves two key changes:

• Replacing the gas orifice with a larger size
• Adjusting the gas pressure regulator

Natural gas operates at lower pressure than propane (about 1/4 psi vs 10 psi). The orifice hole must be approximately 2.5 times larger for natural gas to maintain proper BTU output. For example, if your propane orifice is 0.010″, you’d need to drill it to 0.025″ for natural gas.

Conversion Methods

1. Manufacturer Conversion Kits

Many premium heaters like Bromic patio heaters offer official conversion kits. These typically include:

Kit Component	Purpose
New orifices	Properly sized for gas type
Regulator	Adjusts gas pressure
Instructions	Step-by-step guidance

2. DIY Conversion

Some experienced users drill out existing orifices. This requires:

• Precise drill bits (#60-#80 sizes)
• High-speed drill
• Gas pressure gauge

Warning: DIY conversions may void warranties and create safety risks if done incorrectly.

Key Considerations Before Converting

Safety Factors

Improper conversion can lead to:

• Incomplete combustion (carbon monoxide risk)
• Flame rollout or flashback
• Gas leaks

Always check local codes and consider professional installation. As noted in our built-in gas heater guide, proper ventilation is critical.

Performance Differences

Natural gas has about 10% less energy per cubic foot than propane. Your converted heater may produce slightly less heat, though proper orifice sizing minimizes this difference.

Permanent Installation

Natural gas heaters require fixed gas lines, making them less portable than propane units. Consider your patio layout before converting.

Step-by-Step Conversion Process

1. Verify Compatibility

Check if your heater model supports conversion. Some manufacturers explicitly prohibit it.

2. Gather Materials

• Conversion kit or proper drill bits
• Pipe thread sealant
• Manometer (for pressure testing)
• Leak detection solution

3. Replace Components

Follow the kit instructions precisely. Typically this involves:

1. Shutting off gas supply
2. Removing old orifices
3. Installing new orifices
4. Adjusting regulator pressure

4. Test Operation

Check for:

• Proper flame color (mostly blue with yellow tips)
• No gas odors
• Stable ignition

When to Choose Natural Gas

Natural gas makes sense when:

• You already have gas service to the patio
• You hate refilling propane tanks
• You want lower long-term fuel costs

For portable use, stick with propane or consider an electric patio heater.

Professional vs DIY Conversion

	Professional	DIY
Cost	$150-$300	$20-$50
Safety	High	Variable
Warranty	Usually maintained	Often voided

For most homeowners, professional conversion is worth the extra cost for peace of mind.

Alternative Options

If conversion seems too complex, consider:

• Selling your propane heater and buying a natural gas model
• Using a propane/natural gas dual-fuel heater
• Installing a permanent natural gas heater like those in our built-in heater guide

Remember that proper installation and maintenance are crucial for any gas appliance. Always follow manufacturer guidelines and local building codes when working with gas lines.

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