Yes, candles do give off carbon monoxide and I have looked into this a little further. Thank you for the info. I will pin your message for now. Until now, I have always been fine with my sleeping bag and a hot water bottle, but carbon monoxide is not something to mess with. I believe you can purchase candles that produce low carbon monoxide but I'm not sure that is even worth the risk. I will do some more research. Thanks, and thanks for watching.

@@WelshCarpers no problem at all mate. The only candles I know of that give off less carbon monoxide are those made from coconut wax. But like you say, it’s not worth the risk. Nash used to sell their own version a few years ago, with the selling point being it didn’t even set off a carbon monoxide alarm. But those carbon monoxide alarms are not a good gauge at all. Simply because, if there’s enough carbon monoxide in a bivvy to set off an alarm, you’ve already breathed in too much. The Nash version has since been withdrawn and discontinued, and I’m not surprised. I actually got into a discussion about the safety of gas heaters in a bivvy with Jimmy Armstrong on Facebook. I pointed out that they’re too much of a hazard and shouldn’t be used. Jimmy’s reply was, he has a CO alarm. So I pointed out that if the alarm is set off, you’ve already breathed in too much carbon monoxide. Less than two weeks after I gave that warning, a carp angler died of carbon monoxide poisoning on the bank. I’m not that fond of hot water bottles either, because I had to give first aid to another angler whose hot water bottle burst. The burns he suffered were horrific! I will never forget the screams. What I do is, I place a hot water bottle in the sleeping bag to warm it up, then, I leave the bottle outside.

Great info and advice, thank you.

Don’t waist your money. If your cold through the winter get a diesel heater.

They're not as hot as a gas heater, nowhere near - but it's about keeping anglers safe. Gas heaters are deadly! It isn't about turning your bivvy into a sauna, it's about raising the temperature in extremely cold conditions, safely. They felt hot enough when testing in my shed; enough to warm my hands. Thanks for watching. Tight lines.

@@WelshCarpers at what temperature? They’ll make no difference what so ever bellow 0. I never mentioned anything about a gas heater. I use a diesel heater. Far better than candles which I have tryed in the past and done nothing. A fancy case for them isn’t going to make any difference

@@user-li8vl9tm4h No but there are anglers who do use gas heaters. Diesel heaters are expensive and loud, and require power and diesel - most of them are heavy and quite big. I've used tea light heaters before and felt the benefit in cold temperatures. The case is irrelevant, these heaters are available in black and stainless steel. A 5 season sleeping bag and a hot water bottle is enough normally, but a tea light heater will definitely take the chill out of the bivvy. This tea light heater is small enough to pack in with my gear without being a burden. Thanks for watching. Tight lines.

@@WelshCarpers I got my diesel heater for less than £100 that’s including the battery. Not that expensive. Peanuts compared to what most carp anglers spend on their set ups