Hello Jes.

Thanks so much for reply and info; really appreciate it very much.

Might you suggest a particular model and unit that I can incorporate at the furnace to provide "somewhat" better protection for the furnace's circuit board ?

Something with lower voltage MOV's perhaps that is designed more for this kind of application ? Would have to be careful, though, as in the dead of winter wouldn't want the protection device to trip on "minimal" voltage surges, which it wouldn't surprise me that we also get on the lines here in this neighborhood.
What do you think ?

The circuit board is loaded with electronics as it's a brand new furnace and has lots of solid state controls on it, as contrasted to the older furnace's. As we found out, It is also apparently susceptible to voltage transients.

Much thanks,
Bob