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The E4 Hybrid Tunnel Oven from The Henry Group is a front runner in green oven technology. Equipped with a catalytic oxidizer and indirect first zone followed by the remainder of the oven being direct-gas fired, the E4 can exhaust the direct zone to the catalytic oxidizer, reburn the ethanol exhaust and use it to heat the first zone of the oven before exhausting to oven stacks. Results are cleaner burning exhaust, the use of latent energy and lower energy consumption. It is estimated to save up to 17% on energy usage. (800) 356-7591