More thinking around any harmful effects of elevated Co2 should I have a leak and would I get to a concentration of Co2 in the room that I should be concerned about. In which case a monitor would make sense. Or am I being over cautious and there is no problem.are you Worried in case you leak and run out of gas ? Or worried in case it leaks and it’s harmful ? It’s co2 which is ok but co is harmful ( by product from burning fossil fuels etc )