This Autopilot APCG8LP CO2 generator offers the most affordable CO2 generation possible using liquid propane (LP) while minimizing heat as a by-product. As a primary environmental factor in greenhouses, it provides 22 cubic feet of CO2 per hour for spaces 14 x 14 feet and smaller. It has a solid state electronic ignition module that eliminates the open pilot flame. This generator comes with a standard tip over safety switch that will shut down the fuel in the event the unit falls or tips over, making it the safest, most reliable CO2 generator on the market. Includes hanging hardware kit that comes with 20-inch chains, screw hooks, and S hooks.