Patio heaters are outdoor heating devices designed to provide warmth in open-air spaces, allowing people to enjoy their patios, decks, or gardens even in cooler weather. They typically use propane, natural gas, or electricity as fuel sources and come in various styles, including freestanding, tabletop, and wall-mounted models. These heaters work by radiating heat from a flame or heating element, creating a comfortable environment for gatherings or relaxation. Many patio heaters are portable, making them easy to move around, while others are fixed installations that enhance outdoor aesthetics. Popular brands include Fire Sense and Amazon Basics.