I had a really good deal on a flueless gas fire recently and I've called a couple of gas fitters to come and fit it for me. They won't touch it for some reason ? When I've asked them why not they seem very sketchy on the reasons why !!! I assume they're afraid of putting their names to something which they don't understand. I understand how they work via a catalytic converter but wondered if anyone could give me a concrete reason for people being so wary of fluless gas fires ?