Why do some gas heaters have flues and others not

10 months ago

I would love to have a log look gas fireplace. Trouble is we're in an apartment and getting the flue sorted seems challenging.

What I can't understand is why this type of gas heater (like we have currently) doesn't need a flue


Yet as soon as you add the "log look" a flue seems to be needed


I understand the flue is to remove gasses and toxins, but I am unsure why the look of the fire (log vs not) seems to change the requirement for the flue.

Can someone in the know explain?

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