The Girard tankless water heater can be protected from mud daubers, wasps, mice, birds, etc. using two current screens
that JCJ offers.
The top circular vent can be covered with our model M-800, and the bottom louvered vent can be covered with
our model W-100.
It will be necessary to drill two 1/8" holes in the center louver to install the W-100 screen.
Note: use a 1/8" shim between the louver slot to avoid crushing while drilling the holes.