So...I looked at their methodology, and I noticed one thing right off the bat: They define a home as "unoccupied for the year" if its electricity usage is low

So...I looked at their methodology, and I noticed one thing right off the bat: They define a home as "unoccupied for the year" if its electricity usage is low during the non-heating months - aka. summer. This strikes me as flawed: summer is when you're most likely to be in Vancouver!