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Best Patio Heaters for Cold Nights: Choose by Patio, Wind, and Fuel
For a roofed patio with an accessible outlet, a mounted electric infrared heater is usually the best choice for steady, targeted warmth; for an open, breezy seating area, choose a high-output propane heater with a reflector; and for frequent use near an existing gas line, a professionally installed natural-gas heater can be the most convenient long-term option.
The right heater depends less on a headline square-foot rating than on what blocks the heat, how much wind reaches the seating, and whether you can meet the unit’s clearance requirements. The comparison below focuses on those practical trade-offs. Figures are typical ranges for common residential models, not guarantees; check the specific manual before buying or installing.
Electric vs. Propane vs. Natural Gas
| Type | Typical output or draw | Useful heat area | Wind performance | Fuel and portability | Covered-patio fit |
|---|---|---|---|---|---|
| Electric infrared | 1,500 W for many plug-in units; roughly 1,500–4,000 W for hardwired models | About 30–100 sq. ft. of direct, seated warmth, depending on output and mounting | Good for targeted warmth because it heats people and surfaces directly; strong crosswinds still reduce comfort | No fuel tank; plug-in units are easy to move, hardwired units are not | Often the easiest option under a roof if the heater is listed for that location and installed to its required clearances |
| Propane, freestanding | Commonly 40,000–50,000 BTU/hour | Roughly 100–200 sq. ft. in favorable conditions; less in wind | Moderate; the reflector spreads heat, but an open flame and rising hot air lose effectiveness in a breeze | Usually a 20 lb cylinder; portable, but the cylinder is heavy and needs periodic replacement or refill | Often unsuitable beneath roofs or overhangs because of combustion products and large overhead clearance requirements |
| Natural gas, mounted or freestanding | Commonly 30,000–50,000 BTU/hour | Roughly 100–200 sq. ft. per heater in favorable conditions | Similar to propane at comparable output; placement and wind shielding matter more than fuel type | Continuous supply from a gas line; fixed installation limits portability | Some models are approved for covered locations, but only when the installation meets the manual, local code, and ventilation requirements |
Best Pick by Patio Situation
- Small, roofed balcony or covered seating area: Choose an outdoor-rated electric infrared heater with a suitable mounting position. It provides directional heat without a fuel cylinder, but a standard 120 V outlet limits many plug-in models to 1,500 W. Don’t assume a heater is safe under a low ceiling just because it is electric; use its specified overhead, side, and front clearances.
- Open patio used occasionally: A portable propane reflector heater is a practical choice when you want substantial heat without electrical work or a permanent gas connection. It is easiest to reposition, but still needs stable footing, fresh-air ventilation, and separation from people, furniture, and combustibles.
- Large patio used most evenings: Consider multiple electric infrared units aimed at separate seating zones, or a natural-gas system if a gas line is nearby and a qualified installer confirms the location is suitable. A single powerful heater at one end rarely warms a wide table evenly.
- Windy, exposed seating: Favor directional infrared heat aimed at the occupants and reduce crosswind with a safe, noncombustible windbreak. A taller propane heater may look like it covers a wide circle, but wind can carry much of its warmth away before it reaches seated guests.
- Occasional use with no outlet or gas line: Propane has the lowest setup barrier. If carrying, storing, and refilling a cylinder sounds inconvenient, the convenience of a permanently installed electric or gas option may be worth the upfront work.
Compare Running Cost Before You Buy
Fuel cost can outweigh the purchase price if you use a heater often. Here’s a simple comparison using illustrative U.S. energy prices; substitute your local rates, taxes, and actual heater input for a better estimate.
- Electric: A 1,500 W heater running for three hours uses 4.5 kWh. At $0.18 per kWh, that is about $0.81 per session.
- Propane: A 40,000 BTU/hour heater running for three hours consumes 120,000 BTU, or about 1.3 gallons of propane, using roughly 91,500 BTU per gallon. At $3 per gallon, fuel costs about $3.90 per session.
- Natural gas: A 40,000 BTU/hour heater running for three hours uses 120,000 BTU, or about 1.2 therms. At $1.50 per therm, the gas costs about $1.80 per session.
These are energy-cost estimates, not direct measures of comfort: the electric example has much lower heat output than the gas examples. Electric infrared can still be efficient for one or two people because it targets them instead of trying to warm all the surrounding air. Include installation, cylinder delivery or refill, and any electrical upgrade in the total cost.
Clearance, Wind, and Covered-Patio Safety
Clearance is a model-specific requirement, not a general rule of thumb. Check the manual for distances above the heater, at the sides, and in front; include roof beams, awnings, curtains, umbrellas, and low-hanging lights. If the required space does not fit, choose another heater or location rather than reducing the clearance.
Combustion heaters consume oxygen and produce exhaust, including carbon monoxide. Never use an outdoor propane or natural-gas heater in a home, enclosed porch, garage, tent, or other unventilated area. A covered patio is not automatically safe for a gas unit: use only a model specifically approved for the intended location, with the ventilation and clearances its manufacturer requires. Follow local fire and building codes, and have fixed gas connections installed by a qualified professional.
For any outdoor unit, place it on a firm, level surface and keep it away from traffic paths, dry leaves, cushions, and anything that could tip into it. Use outdoor-rated electrical equipment and a properly protected circuit for electric heaters; don’t run a cord where it can be pinched, wet, or walked on. Turn the heater off before moving it, changing a cylinder, or leaving the patio.
Ownership Details That Affect the Choice
On electric heaters, the element and reflector are the parts most exposed to heat and dirt. Dust can reduce useful output, so let the unit cool and clean it as directed by the manufacturer. Inspect the cord, plug, mounting hardware, and weather seals; replace damaged equipment rather than improvising a repair. For a hardwired unit, use a qualified electrician if the circuit or installation needs attention.
Propane heaters have more routine upkeep. Keep the burner and reflector free of debris, check the hose and regulator for damage, and follow the manual’s leak-check procedure after connecting a cylinder. Store cylinders upright outdoors in an approved location, away from heat and ignition sources. Corrosion, blocked burner openings, loose fittings, and a dented or unstable base are reasons to stop using the heater until it is repaired or replaced.
Natural-gas heaters avoid cylinder changes but are not maintenance-free. Keep the burner and air openings clear, look for visible corrosion or damage, and arrange service if the flame behaves unusually or the unit smells of gas. Don’t modify an appliance or convert it between fuels unless the manufacturer explicitly provides an approved conversion procedure and a qualified professional performs it.
Bottom Line
Choose electric infrared for targeted warmth under a suitable covered patio, propane for flexible occasional use in open air, and natural gas when frequent use and an existing connection justify a fixed installation. For all three, prioritize the actual seating zone, exposure to wind, required clearances, and local operating costs over a broad advertised coverage figure.