How to size a patio heater for your yard
Measure the usable area, not the lot
A standard 40,000–46,000 BTU pyramid or umbrella patio heater warms about 15–20 ft of radius around it. Tabletop heaters cover 4–6 ft. Wall- or ceiling-mounted electric infrared heaters cover 10–12 ft in the direction they face. Pick by area, not by BTU alone.
Clearance from structures
Most jurisdictions require setbacks from property lines, structures, and overhead utility lines. Even where setbacks aren't legally required, allow at least 24″ from any wall or fence for maintenance access and to keep moisture from damaging both the structure and the new piece.
Anchoring and weight
Standalone propane heaters must be on a level surface with at least 2 ft of clearance on all sides and 3 ft overhead. Most have a tip-over auto-shutoff; even so, weighted bases are recommended in any windy yard. Never run a propane heater under a covered patio without explicit ventilation.
Common mistakes
- Sizing to the lot dimensions rather than the level usable space.
- Forgetting setback rules — some require permits even for things that look freestanding.
- Ignoring sun and wind direction; the right size in the wrong spot becomes unusable in summer or storms.