Q: What is the guarantee on the harmonic filters?

Five years  and the stated life expectancy is 15 years, but in practice this is a passive filter, and has no wear and tear unless you have a direct lightning hit or you burn down the building.

Do you certify installers? 

Yes, we do. Every contractor who installs the filters needs to be factory certified, besides being a licensed electrician.

Do you have customer service?

Of course! Even with a product that requires no service after installation, we do have customer service. First of all we are always on hand for the installation process. After installation the only practical issue that could come up is if you have modifications to your electrical system and you need to refurbish your filter(s). We can arrange that with the manufacturer.