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The combination of the patent pending arch top and the front mounted high velocity exhaust slot reduces the amount of exhausted CFM by 45% compared to traditional CFM rates. This translates into an annual electric and gas savings of up to 40%. Now that's maximizing your energy and cost savings! AVTEC The Avtec EcoArch 4000Series Model Number1 Hood Section Dimensions2 Application CFM/Ft3 EA4-DDLLL-30 Available length of 48" to 192" x 30" high 600°F 150 EA4-DDLLL-30 Available length of 48" t