You will not find an indoor-safe Buddy heater in Canada. These units have not been approved for indoor use in Canada. The same units are approved for indoor use in the States with proper ventilation (except in MA if I remember right, different state laws).
It's the exact same unit north and south of the border, but different labeling and user manuals due to different laws.
Not all non-vented heater are equal. Many heater types have been tested and compared by the United States Consumer Safety Commission. They have published two VERY interesting documents that can be downloaded:
Please take time to read them, you will find how much more safe the Oxygen
Depletion Sensor-equipped heaters like Buddy heaters are. Results are totally different for ODS units, as for CO emissions. You will also find why some types of heaters are downright dangerous, and can kill you in no time.
This being said, I have a Big Buddy, I always use a CO detector, never sleep with the heater ON, and never had any issue.