Lava Heat Italia Caldo T-Line Natural Gas Patio Heater in Heritage Bronze Another option from Lava Heat Italia, its Caldo T-Line Natural Gas Patio Heater in Heritage Bronze ($700) runs on natural gas and can heat a 144-square-foot radius. Image Source: bedbathandbeyond.com Caldo T-Line Natural Gas Patio Heater in Heritage Bronze $700 from bedbathandbeyond.com Buy Now