I do not believe that WETT certification is required annually!
I just sold my oceanfront summer home in Nova Scotia and had a non WETT installation (had not used it).
I had a beautiful new large round (44" across- glass all around) fireplace, in a vaulted ceiling panoramic ocean view living room.
The local yokel did not want to WETT certify it, because it was made in the USA, and thus did not have a CSA sticker. It was brand new, but my buyer said he did not want it, because it was not WETT certified..
What a shame!
I removed it, and took it, along with the class B chimney, back to the USA.
When I get back up to New England (Florida now) I will list it on E-bay.
I bought it in Minnesota 29 years ago, but never used it.
Paid $3000 then. Will list it on E-Bay in the Fall.
It will be perfect for someone in Maine, NH, or VT, with a large lake, or ocean view, living room.
Question: Do bananas sold in Canada need a CSA sticker too?