SAVE GRAIN CONTINUUM command reports volume emissivities, not fluxes
Hazy 1 is not particularly clear about what the SAVE GRAIN CONTINUUM command reports. It sort of suggests that it is a flux, similar to other SAVE CONTINUUM commands. However, that is wrong. It reports the volume emissivity nu4pijnu in erg/cm^3^/s. This should be stated much more clearly (with units) in Hazy 1. You could even question whether this should be a SAVE CONTINUUM command as the word continuum suggests a flux to me...
The same misconception seems to impact the final calculation of the grain continua in save_do.cpp. In the routine flxCell(), switch cases CT_GRN_SIL, CT_GRN_GRA, and CT_GRN_TOT, a factor radius.PI4_Radius_sq is used for spherical dilution, which is inappropriate for a volume emissivity. You could also have a discussion whether the factor geometry.covgeo is appropriate. I am inclined to think it is not...