Direct vented, even the models that don't require power are quite safe. Like ALL appliances, they have to be maintained and kept clean. These are the most common in my area. Unit with fans (both for venting and heated air) are a bit more efficient, but require power.
The direct fired or non-venting type are illegal in my area. They need considerable ventilation, so you'll have to keep windows open a bit, even if it's very cold outside. Quite dangerous in tight houses in my opinion, but many people around the world seem to use them regularly.
Cheers!
The direct fired or non-venting type are illegal in my area. They need considerable ventilation, so you'll have to keep windows open a bit, even if it's very cold outside. Quite dangerous in tight houses in my opinion, but many people around the world seem to use them regularly.
Cheers!