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I have an AprilAire 500 humidifier that is installed in a very tight utility space. The original installed did not place a bypass duct on the unit becuase of the confined limits of the tiny closet. I suspect that we do not get the full benefit of humidification without the bypass duct.
I have looked at the space I have there and determined that using an oval duct takeoff would fit between the two PVC intake and exhaust pipes. Then convert to 6" round semi-rigid flex duct, and proceed up to the AprilAire connector. I would need to modify the PCV Exhaust vent, removing a sweep elbow and replacing it with two 45 degree fittings to move the pipe away from the AprilAire intake connection.
My dilemma is cutting the oval hole needed for the takeoff fitting. I do not want to drop drill chips down inside the A-Coil just below the plenum where the hole must be made. I also cannot locate a 6 inch oval duct takeoff fitting with a "scoop" inside the plenum. I have seen discussions where the scooped fitting will direct more airflow into the attached duct connection.
Pictures are attached. Suggestions or ideas?
I have looked at the space I have there and determined that using an oval duct takeoff would fit between the two PVC intake and exhaust pipes. Then convert to 6" round semi-rigid flex duct, and proceed up to the AprilAire connector. I would need to modify the PCV Exhaust vent, removing a sweep elbow and replacing it with two 45 degree fittings to move the pipe away from the AprilAire intake connection.
My dilemma is cutting the oval hole needed for the takeoff fitting. I do not want to drop drill chips down inside the A-Coil just below the plenum where the hole must be made. I also cannot locate a 6 inch oval duct takeoff fitting with a "scoop" inside the plenum. I have seen discussions where the scooped fitting will direct more airflow into the attached duct connection.
Pictures are attached. Suggestions or ideas?