When the evening chill sets in, a patio heater extends your outdoor living season. But which type makes more sense for your space: electric or propane? It's a common question, and the answer isn't just about initial price. While a 40,000 BTU propane heater might offer more immediate heat, its running costs can quickly add up, often exceeding $5 per night compared to an electric unit's $1.50 to $3 for similar warmth.

Quick answer: For convenience, lower running costs, and precise zone heating, an electric patio heater is often the better choice. If you need maximum portability and high heat output in an open, uncovered area, propane delivers. Most homes will find electric models more practical for everyday use.

Here's a direct comparison of electric and propane patio heaters:

| Feature | Electric Patio Heater | Propane Patio Heater | | :---------------- | :-------------------------------------------------- | :------------------------------------------------- | | Heat Type | Radiant infrared (directional) | Convection (heats air) and some radiant | | Fuel Source | Electricity (120V or 240V) | Propane tank (20 lb typical) | | Heat Output | 1,500 W (5,100 BTU) to 6,000 W (20,400 BTU) | 10,000 BTU to 48,000 BTU | | Running Cost | $0.15 - $0.30 per hour (1,500W) | $1.50 - $2.50 per hour (40,000 BTU) | | Portability | Limited by power cord length, some wall-mounted | High, can be moved anywhere | | Setup | Plug-in or professional wiring | Connect propane tank, simple | | Maintenance | Minimal, occasional bulb replacement | Tank refills, burner cleaning | | Safety | No open flame, tip-over switch, cool-to-touch | Open flame, CO risk, tip-over switch, hot surfaces |

Electric Patio Heaters: Efficiency and Convenience

Electric patio heaters operate on infrared technology, warming objects and people directly rather than heating the air. This makes them highly efficient, especially in breezy conditions where convection heat (like propane) would dissipate quickly. You'll find models ranging from 1,500 watts, suitable for a small bistro set, up to 6,000 watts for larger covered patios. Many units run on standard 120V household outlets, making setup straightforward. For higher wattage models (over 2,000W), you might need a dedicated 240V circuit, often requiring a professional electrician.

The running costs are a major selling point. A typical 1,500-watt electric heater, like the Dr. Infrared DR-238, uses 1.5 kWh of electricity per hour. If your electricity rate is $0.18 per kWh, that's just $0.27 per hour. Over an entire evening, say 4 hours, you're looking at about $1.08. That's a significant saving compared to propane. They also require minimal maintenance. There's no tank to refill, no igniter to clean, and no carbon monoxide emissions to worry about. They're ideal for enclosed patios or screened-in porches where propane isn't an option. Look for models with IP55 weather ratings for outdoor durability.

Some electric models, like the Bromic Tungsten Smart-Heat Electric, offer dimmable settings and come with remote controls, giving you precise control over the heat output. Installation can be as simple as plugging into an outdoor outlet, or for wall-mounted and ceiling-mounted units, it may involve some basic wiring. These types of heaters are great for creating specific warm zones, like over an outdoor dining table.

Propane Patio Heaters: Power and Portability

Propane patio heaters, often called "mushroom" heaters due to their shape, are powerful. They use a standard 20-pound propane tank, the same kind you'd use for a BBQ grill. These units generally put out between 30,000 and 48,000 BTUs, heating a larger area through convection. This means they warm the air around them, which can be less efficient in windy conditions, but they provide a more enveloping warmth in still air. The portability is unmatched. You can move a propane heater anywhere on your patio, deck, or even a remote area of your yard without needing an electrical outlet. This flexibility is a big advantage for spaces that change often.

However, the running costs are higher. A 20-pound propane tank, costing around $20-$25 to refill, provides approximately 10 hours of heat at a medium setting (around 40,000 BTUs). That's $2.00-$2.50 per hour, or $8-$10 for a 4-hour evening. These costs can add up quickly if you use the heater frequently. You'll also need to store spare propane tanks, which can be a safety concern for some homeowners. For tips on insulating your home, check out our guide on a beginners guide to home insulation.

Safety is another consideration. Propane heaters have an open flame and produce carbon monoxide, so they must always be used in well-ventilated outdoor areas. They're not suitable for enclosed spaces. Most models include a tip-over switch that shuts off the gas supply if the unit falls over, a key safety feature. When comparing heating systems, understanding the differences in fuel and safety is key, much like comparing air source heat pumps vs geothermal systems.

Cost Analysis: Fuel and Installation

The financial difference between electric and propane heaters isn't just about the purchase price. A basic 1,500W electric heater might cost $100-$200, while a decent propane unit could be $150-$300. But the real cost comes from fuel. As mentioned, electric runs $0.15-$0.30 per hour. Propane runs $1.50-$2.50 per hour. If you use your heater 3 nights a week for 3 hours each time (36 hours per month), the difference becomes clear.

| Heater Type | Monthly Fuel Cost (approx. 36 hours) | Annual Fuel Cost (approx. 6 months use) | | :---------- | :----------------------------------- | :-------------------------------------- | | Electric| $5.40 - $10.80 | $32.40 - $64.80 | | Propane | $54.00 - $90.00 | $324.00 - $540.00 |

Installation costs can also vary. Many electric heaters are plug-and-play. However, hardwired electric units, especially higher wattage 240V models, might require an electrician, adding $150-$400 to the initial cost. Propane heaters generally don't have installation costs beyond connecting the tank, but you might pay a premium for tank refills or exchanges. Over a 5-year lifespan, the fuel savings from an electric heater can easily offset any higher initial purchase or installation costs.

Which Should You Choose?

Deciding between electric and propane boils down to your specific needs and priorities.

Choose an Electric Patio Heater if:

  • You prioritize low running costs. It's significantly cheaper to operate long-term.
  • You need consistent, directional heat. Infrared electric heaters are less affected by wind.
  • Your patio is covered or semi-enclosed. No open flame or carbon monoxide risk makes it safer for these spaces.
  • You value convenience. No heavy propane tanks to refill or store.
  • You want precise heat control. Many models offer adjustable settings and remote operation.

Choose a Propane Patio Heater if:

  • You need maximum portability. Move it anywhere, no cord required.
  • You've a large, open outdoor space. Propane heaters typically offer higher BTU output for broad coverage.
  • You only use it occasionally. The higher running costs are less impactful for infrequent use.
  • You need quick, powerful heat. They warm up fast and deliver substantial warmth.

For most homeowners looking to extend their patio season without breaking the bank on fuel, an electric patio heater is the more practical and cost-effective choice. It offers efficient, targeted warmth with minimal fuss.

Sources

  • U.S. Energy Information Administration. "Residential energy prices." 2024.
  • National Fire Protection Association (NFPA). "Outdoor Heating Safety." 2023.

FAQ

How much does it cost to run an electric patio heater per hour?

A 1,500-watt electric patio heater typically costs between $0.15 and $0.30 per hour to operate, depending on your local electricity rates. For example, at a rate of $0.20 per kWh, it's about $0.30 for 90 minutes. Propane can be more expensive.

Are propane patio heaters safe to use?

Propane patio heaters are safe when used correctly, always outdoors with good ventilation. You'll need to keep them away from flammable materials (at least 3 feet) and ensure the tank is stable. Never use them indoors or in enclosed spaces.

Can electric patio heaters be left out in the rain?

Most outdoor electric patio heaters are rated for weather resistance (e.g., IP55). This means they can withstand rain and splashes, but it's best to cover them or bring them inside during heavy downpours or freezing conditions to extend their lifespan.

What size patio heater do I need for a 10x10 foot patio?

For a 10x10 foot (100 square feet) patio, a 1,500-watt electric heater or a 20,000-30,000 BTU propane heater should provide adequate warmth. Consider your local climate and whether the area is covered or open.