A patio heater is what keeps the outdoor living room usable once the sun drops and the evening turns cool -- the difference between heading inside at nine and staying out until midnight. Unlike a fire pit, which is a gathering feature you sit around, a patio heater is about radiant warmth over a seating area so people stay comfortable in the chairs they're already in. The trick is matching the fuel, type, and heat output to your actual space, then placing it safely. Here's how to choose a patio heater that genuinely extends your season.

Start With the Space You Need to Heat

Patio heaters warm people by radiant heat, not by warming the surrounding air the way a furnace does, so the question is "how big is the zone where people sit?" A small balcony or bistro corner needs only a tabletop unit or a single wall-mounted heater. A typical patio seating group is well served by one freestanding "mushroom" heater in the middle or two mounted units flanking the seating. A large or windy patio may need multiple heaters or higher-output mounted units. Measure the seating footprint first; an undersized heater on a big patio just teases people with warmth they can't feel.

Propane vs. Natural Gas vs. Electric

Fuel is the first real decision, and each type has a clear trade-off:

Propane heaters are the most portable and need no installation -- you move them where the crowd is and swap a tank when it runs low. The downside is buying and storing tanks, and you'll occasionally run out mid-evening. Best for freestanding flexibility.
Natural gas heaters connect to your home's gas line, so they never run out and cost less to run -- but they're fixed in place and require a pro to plumb the line. Best for a permanent, frequently used spot.
Electric (infrared) heaters produce no flame, fumes, or emissions, so they're the safe choice under a covered patio, pergola, or enclosed porch where open flame and clearance are a concern. They warm objects and people instantly, run quietly, and many are slim enough to mount overhead or on a wall -- you just need a weatherproof outlet nearby, and they don't throw as much heat in fully open, breezy areas.

Choose the Type

Once you know the fuel, pick the form that fits the space:

Freestanding (mushroom/pyramid) heaters stand tall and radiate heat down and out over a wide circle -- the workhorse for open patios and the easiest to reposition.
Tabletop heaters are compact units for a small table or balcony, warming the people right around it.
Wall- or ceiling-mounted infrared heaters save floor space and disappear into the architecture -- ideal under a covered patio, pergola, or porch where a tall freestanding unit would be awkward or unsafe.
Hanging heaters drop from a pergola beam or covered ceiling to warm the seating directly below.

Size the Heat Output

Gas heaters are rated in BTUs and electric heaters in watts. As a rough guide, a freestanding propane heater around 40,000 BTU comfortably warms a typical seating circle, while smaller tabletop and electric units run far lower and suit tight spaces. More output covers a larger area, but bigger isn't automatically better -- an oversized heater on a small balcony is overkill and burns more fuel. Match the rating to the seating footprint you measured, and in a windy or fully open spot, plan for more output (or more units) since heat dissipates faster.

Mind Safety and Clearances

This is non-negotiable, especially with flame-based heaters. Keep open-flame (propane and natural gas) heaters away from anything that can catch -- maintain the manufacturer's overhead and side clearances from ceilings, umbrellas, walls, and furniture, and never use a gas heater in a fully enclosed space, as they require ventilation. Look for safety features: an anti-tilt auto-shutoff (essential on freestanding units), a stable weighted base, and a flame-failure cutoff. For covered, enclosed, or low-clearance areas, an electric infrared heater is the safer pick because there's no flame or fumes. Always confirm a heater is rated for how you'll use it -- "outdoor only" vs. "covered patio safe."

Finish and Weatherproofing

The heater lives outside, so build matters. Stainless steel and powder-coated finishes resist rust best; match the finish to your other outdoor metals and fixtures so it reads as part of the space rather than an appliance dropped in. A weatherproof cover dramatically extends a heater's life, and for propane units, a wheeled base makes a heavy freestanding heater easy to move and store. A quality heater that's covered and stored through the off-season will outlast a bargain unit left to corrode.

Common Patio Heater Mistakes

Buying too small for the space. An undersized heater on a big patio never feels warm. Size output to the seating footprint.
Flame heater under a low cover. Open flame needs clearance and ventilation. Use electric infrared for covered or enclosed areas.
Ignoring the anti-tilt cutoff. A tall freestanding heater that can't auto-shutoff if it tips is a hazard. Insist on the safety feature.
Leaving it uncovered year-round. Weather corrodes finishes and controls. Cover and store it off-season.
Treating it like a fire pit. A heater warms seating; it isn't a focal gathering flame. If you want the fire experience, that's a different feature.

See Your Whole Outdoor Space Come Together

A patio heater is one piece of a comfortable outdoor room -- it works best alongside the right seating, shade, and lighting. Upload a photo and preview how your patio comes together with Room Reveal before you buy. For inspiration, browse Mediterranean sunroom ideas and coastal living room ideas, and keep building your space with our guides to choosing a fire pit, decorating a patio, and choosing outdoor furniture.

How to Choose a Patio Heater: Stretch Your Outdoor Season Into the Cool Hours