Perhaps we are speaking of different things.
Hi. Mike; Hope you are doing well.
I found this that Brian might be referring too.
I am not sure my comprehension of what he is saying is following, but here it is.
Q: Does UL test to Canadian Standards?
A:
Under our Canadian Listing program, UL can test products to the appropriate Canadian standards. If the product is found to be in compliance, UL will issue a UL Listing, Classification or Recognition Marking with a small “c” as an identifier. In addition, UL introduced a new Listing Mark, the C-UL US Listing Mark, in early 1998. This Mark indicates compliance with both Canadian and U.S. requirements. The Canada/U.S. UL Mark is optional.
Marcel 
In the 1990’s, from working on 2 different standards creation committees with CSA and CGSB, it was conveyed to me that ULC, a third Canadian standards creation/testing/certification entity, is its own fully independent operation. With the goal of standards harmonization, these orgs had to become affiliated in that they recognize each others capabilities, QC and professionalism as being equal and maybe in some instances complimentary.
If they would have been all part of the same org with Canada being a branch plant of the US operation, harmonization should have proceeded at a much faster pace.
Marcel:
Just trying to clear up a few subtle differences about certification marks so that people who do not know the subtleties do not get fooled or, in the worst case, accept something by seeing a label they don’t know how to read correctly and it leads to injury, death or a law suit down the road.
For example:
In the US, someone may find this label* on equipment (stove pipe, chimneys, etc) on some mis-shipped products (I have a story about that). By looking at the UL mark, one might think that this was tested by UL- a readily accepted organization- and approved for installation in the US…but it is not! The equipment may have been manufactured and tested in the US but cannot be installed there as it does not meet a US standard.
- from the ULC website:
http://www.ul.com/marks_labels/mark/marks/C_UL.gif
C-UL Listing Mark
This mark is applied to products for the Canadian market. The products with this type of mark have been evaluated to Canadian safety requirements, which may be somewhat different from U.S. safety requirements. You will see this type of Mark on appliances and computer equipment, vending machines, household burglar alarm systems, lighting fixtures, and many other types of products.
My story:
About 10’ from where I now sit is a Vermont Castings Resolute wood stove. In 1983, it was shipped to a former acquaintenance’s Alternative Energy store here in Nova Scotia but was tested and certified to an American Standard only. He knew I was looking for a better stove than I was using, so gave me a call.
After checking with VC and my insurance company, getting the their OK, I purchased the stove at his cost (it pays having a Scottish name). Apparently, at that time, the stoves that were sold in both countries were the same but had to be tested in a US and a Canadian lab to different standards. To save $$$ in labelling, they only affixed the label for the country the units were intended to be shipped to and did not affix two labells to all units…so they saved ,what, $0.50 per unit!
Things were much less stringent in the wood heat industry then and I might not be able to do this deal now.
a simple call to a fire place specialist would probably help you on this one or google pellet stove consruction/schematics or something like that might help