THIS ITEM IS NOT FOR SALE TO RESIDENTS IN CALIFORNIA OR CANADA.TECHNOLOGY - 10, 000 BTU Operates off Liquid Propane Gas (Only) Blue Flame Heater which Heats up to 300 sq. ft. AreaDEPENDABLE - Thermostat Control offers automatically cycles the burner on and off to maintain a desired room temperature. Ideal for greater heat flow that could add the warm atmosphere in your roomCONVENIENT: Includes a 10-foot hose with a regulator so the heater can operate off a standard 20lb propane cylinder.ECONOMICAL - 99. 9% efficient with Vent Free gas burner. No outside duct or chimney needed! Environmental Protection and Energy ConservationSAFE - Push Piezo ignition with Built-in pilot oxygen depletion sensor (ODS) immediately shuts down the heater if carbon monoxide or lack of oxygen is detectedWARNING - Not approved for use in California or Canada. Please check local codes for permitted use.1