Universal design simplifies gas appliance installation. For Kozy World gas fuel heating appliances. Works for any Kozy World gas heating appliance; makes installation easy. Please refer to your product's owner's manual for additional information. California or Canada! NOTE: The state of California prohibits the use of this product. Due to the built-in oxygen safety sensor vent free products may not work properly at elevations of 4500 ft. Please check your state and local codes prior to purchase. WARNING - CALIFORNIA RESIDENTS ONLY: This product can expose you to chemicals including Lead, which is known to the State of California to cause cancer and reproductive harm. For more information go to: www.P65Warnings.ca.gov