Buying Guide to Outdoor Propane Heaters, Safety Tips and Maintenance

As a technician who’s worked extensively with heating systems, I understand the importance of choosing the right propane heater and using it safely. Propane heaters are efficient, portable, and powerful, but their safe operation depends on proper selection, installation, and maintenance. Here’s a detailed guide to help you make informed decisions about propane heaters.

How to Choose a Propane Heater

Selecting the right propane heater involves more than just picking one off the shelf. Here are the key factors I always advise my clients to consider:

Choosing the right propane heater starts with understanding your space and heating needs. First, calculate the required BTU (British Thermal Unit) output. This measures the heater’s heat capacity. To determine the BTU requirement, multiply the square footage of the area by the desired temperature increase and a factor of 0.133. For example, heating a 500 sq. ft. space with a 30°F rise requires around 1,995 BTUs.

Next, decide on the type of heater:

• Forced Air Heaters: Ideal for large, open areas like construction sites or garages. They distribute heat rapidly using a fan, providing quick and efficient warming.
• Radiant Heaters: Best for targeted heating as they emit infrared heat to warm objects and people directly, making them perfect for workshops or patios.
• Convection Heaters: Excellent for evenly heating enclosed spaces by naturally circulating warm air, suitable for basements and insulated garages.

Consider whether you need a portable or fixed installation. Portable heaters offer flexibility and convenience, whereas fixed units deliver consistent heating for dedicated spaces.

Finally, prioritize safety features such as oxygen depletion sensors (ODS), tip-over shutoffs, flame failure devices, and overheat protection to safeguard against accidents.

How to Prevent Carbon Monoxide Poisoning from a Propane Heater

Carbon monoxide (CO) is a silent killer—odorless, colorless, and deadly. Preventing CO poisoning is crucial:

Ensure adequate ventilation in any space using a propane heater. Even “indoor-safe” heaters require some airflow. Crack a window or door to facilitate air exchange.

Install carbon monoxide detectors near sleeping areas and in any room with a propane heater. Test these devices monthly and replace batteries regularly to ensure proper function.

Perform regular inspections of your heater. Check for blockages, damage, and ensure clean, efficient combustion.

Always use the correct heater for the space. Outdoor-only heaters should never be used indoors. Stick to indoor-rated models in enclosed areas.

Choosing the Right BTU for Your Propane Heater

Selecting the proper BTU rating is critical for effective and safe heating:

To calculate the required BTU, use this formula:

BTU Needed = Area (sq. ft.) × Desired Temperature Rise (°F) × 0.133

Consider the following factors:

• Insulation Quality: Poor insulation may necessitate a higher BTU heater.
• Climate Conditions: Colder climates require heaters with greater BTU output.
• Usage Pattern: Continuous use might call for a higher BTU rating, whereas intermittent use may need less.

Avoid both oversizing and undersizing the heater. Oversizing wastes fuel and increases costs, while undersizing leads to insufficient heating.

Top 5 Best Outdoor Propane Heaters in Australia: Stay Warm in Style 

Outdoor Propane Heater Running Cost

Running costs for outdoor propane heaters in Australia depend on the heater’s MJ/h rating and the price of LPG. An 8.5 kg swap-and-go LPG cylinder costs around $31.50 and contains roughly 417 MJ of energy. For example, a heater rated at 37 MJ/h will run for about 11 hours on a full cylinder (417 ÷ 37 ≈ 11.3). Lower-output models, such as 28 MJ/h units, can stretch that runtime to around 15 hours.

While LPG heaters often deliver more immediate radiant warmth than electric models, recent gas price increases mean they’re not always the cheapest option. At current rates, expect to pay between $2.00–$2.90 per hour of operation, depending on efficiency and local LPG prices. To reduce costs, choose a heater with adjustable output, use it only when needed, and position it to minimise heat loss from wind. For frequent use in a fixed location, consider a natural gas connection or high-efficiency infrared model to lower long-term expenses.

How Long Does a 20lb Propane Tank Last for a Heater?

Understanding propane consumption helps in planning:

A standard 20lb propane tank holds about 4.7 gallons, equivalent to approximately 430,050 BTUs.

Estimate the runtime with this formula:

Runtime (hours) = Total BTUs in Tank / Heater BTU Rating

For instance, a 20,000 BTU heater can run for roughly 21.5 hours (430,050 ÷ 20,000).

Keep in mind, external factors like ambient temperature, wind, and heater efficiency can influence the actual runtime.

Propane Heater Maintenance Tips

Routine maintenance is key to safety and efficiency:

Perform regular leak checks using a soap-and-water solution on gas connections. Bubbles indicate a leak.

Keep internal components clean. Dust and debris can clog burners and pilots. Use compressed air to clean them.

Inspect hoses and regulators for cracks, wear, or damage. Replace any compromised parts immediately.

Schedule annual professional servicing to ensure all components function optimally and safely.

How to Clean a Propane Heater

Cleaning your heater enhances safety and performance:

1. Turn Off and Cool Down: Always shut off the heater and let it cool.
2. Disassemble Components: Carefully remove detachable parts as instructed in the manual.
3. Clean Burner and Pilot Light: Use a soft brush and compressed air to clear out dust.
4. Wipe Down the Exterior: Use a damp cloth for the outer casing.
5. Reassemble and Test: Reassemble the unit and perform a test run to confirm proper operation.

Outdoor Propane Heater Safety Tips

Propane heaters are safe when used correctly, but misuse can lead to fire hazards or carbon monoxide risks. Australian safety authorities, including Fire and Rescue NSW, recommend always operating heaters on stable, level ground and keeping them clear of combustible materials such as shade sails, furniture, or plants. Maintain at least one metre of clearance around the unit, and never use an outdoor-rated propane heater indoors or in enclosed spaces.

Before each use, perform a gas leak check using the soapy water method on all hose and regulator connections. If bubbles form, turn off the gas immediately and fix the leak before operating. Regularly clean the burner and emitter screens to prevent debris buildup, which can cause uneven flames or flare-ups. Always supervise the heater while it’s running, keep children and pets at a safe distance, and store LPG cylinders outdoors in a secure, well-ventilated area. For long-term reliability, have your heater serviced every two years by a licensed gas fitter.

Can You Use a Propane Heater in a Tent?

Yes, but only with models specifically designed for tent use.

Choose a heater that is certified for indoor/tent use and equipped with features like an oxygen depletion sensor.

Maintain adequate ventilation by keeping a vent or window slightly open.

Never sleep with the heater on; always turn it off before sleeping.

How to Safely Use Propane Heaters Indoors

Using propane heaters indoors demands strict safety measures:

Select only indoor-rated models with safety certifications.

Ensure consistent ventilation to prevent CO buildup.

Install CO detectors and smoke alarms nearby.

Place the heater on a stable surface, away from flammable materials and high-traffic areas.

How to Safely Use a Propane Heater in a Garage

Garages have unique hazards, requiring special precautions:

Use a garage-rated heater with built-in safety features.

Provide adequate ventilation by opening windows or garage doors slightly.

Keep heaters away from flammable materials like gasoline, oil, or paint.

Install a carbon monoxide detector in the garage and test it regularly.

By following these guidelines, you can enjoy the warmth and convenience of a propane heater safely. As a technician, I can’t stress enough the importance of proper selection, maintenance, and safe operation. Stay warm and stay safe!

Outdoor Gas Heater Bunnings

For many Australians, Bunnings is the go-to destination for outdoor heating solutions, offering a wide range of LPG and natural gas patio heaters from brands like Mimosa, Jumbuck, Heatstrip, and Enders. These units vary in style—from the classic “mushroom” design to sleek quartz tube models—and can heat areas from 10 m² to over 17 m² depending on the model. Prices typically range from around $179 for entry-level units to $849 for premium stainless steel or portable commercial-grade heaters.

When selecting a gas heater from Bunnings, pay close attention to heat output (MJ/h), build materials, and safety features such as tip-over shutoff, flame failure devices, and oxygen depletion sensors. If you’re looking for a statement piece that combines style with performance, consider an outdoor propane heater pyramid — a tall, glass-tube flame heater that not only delivers warmth but also creates an ambient focal point for your patio or alfresco area.

Models like the Havana Stainless Steel Pyramid Heateror Gasmate’s Deluxe Stainless Steel Pyramid Flame Heater offer powerful heat coverage, push-button ignition, and durable finishes that suit both residential and commercial spaces. Always follow the manufacturer’s clearance guidelines to avoid heat damage to awnings or walls, and remember that outdoor gas heaters are designed strictly for open-air use.

Outdoor Propane Heater FAQs