The 3221-0029-00 Filter End Cover was used by several manufactures including GHP Group, DynaGlo, Dura-heat and others for use on their kerosene and diesel portable forced air residential heaters and portable construction heater...... These model could have used a Single pressure adjustment Filter End cover or a BTU Switch Duel Pressure Cover. If your current Filter End Cover has the Rotary BTU Switch you will need to order the 3221-0073-00 Filter End Cover Kit as a replacement.
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