yes, cut an oval of sheet metal, put a bead of silicone seal on the flange, screw it on - for the round hole I think there should be a snap in metal plug for electrical boxes that will fit, some silicone on it too

Bill


Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics