How to warm your patio or porch - The Washington Post
Restaurants Face Patio Heater Shortage - Foodservice Equipment Reports Magazine
Bromic Eclipse Smart-Heat 2900 W Portable Electric Heater - Patio Fever
KOP Restaurants Combat the Cold with Portable Heaters – King of Prussia District
Amazon.com: Space Heater for Indoor Use Large Room - Air Choice 1500W Room Heater with 3S Quick Heating/Safe Infrared Heater with 3 Modes/Super Quiet Portable Heater Garage, Electric Outdoor Heaters for Patio :