Here is something that heats everything around it when it burns... 

local a = elements.allocate("NOBODY" , "HHHH")
elements.element(elements.NOBODY_PT_HHHH, elements.element(elements.DEFAULT_PT_BCOL))
elements.property(elements.NOBODY_PT_HHHH, "Name" , "LOL")
elements.property(elements.NOBODY_PT_HHHH, "Description" , "Something")
elements.property(elements.NOBODY_PT_HHHH, "MenuSection" , 5)
elements.property(elements.NOBODY_PT_HHHH, "Gravity" , 0)
elements.property(elements.NOBODY_PT_HHHH, "Falldown" , 0)
elements.property(elements.NOBODY_PT_HHHH, "Flammable" , 10)
elements.property(elements.NOBODY_PT_HHHH, "Explosive" , 100)
elements.property(elements.NOBODY_PT_HHHH, "Diffusion" , 0)
elements.property(elements.NOBODY_PT_HHHH, "Weight" , 100)
elements.property(elements.NOBODY_PT_HHHH, "Advection" , 0.1)
elements.property(elements.NOBODY_PT_HHHH, "AirLoss" , 0.95)
elements.property(elements.NOBODY_PT_HHHH, "Loss" , 0.15)
elements.property(elements.NOBODY_PT_HHHH, "Temperature" , 295.15)
elements.property(elements.NOBODY_PT_HHHH, "HeatConduct" , 255)
elements.property(elements.NOBODY_PT_HHHH, "MenuVisible" , 1)
function heat(i,x,y,s,n)
type = tpt.get_property("type", x + math.random(-5,5), y + math.random(-5,5))
if type == tpt.el.fire.id then
tpt.set_property("temp", math.huge, x + math.random(-10,10), y + math.random(-10,10))
end
end
tpt.element_func(heat,elements.NOBODY_PT_HHHH)

If you tell me specifically what your wanting I will make it for you... 

There it flows the same way OXYG does, Has a Blue-ish color, Doesn't create fire and just disappears, and heats the flame from 422°C to 472°C (50 degrees), and Doesn't conduct its own heat, and fixed the error message problem.

local a = elements.allocate("NOBODY" , "HHHH")
elements.element(elements.NOBODY_PT_HHHH, elements.element(elements.DEFAULT_PT_OXYG))
elements.property(elements.NOBODY_PT_HHHH, "Name" , "LOL")
elements.property(elements.NOBODY_PT_HHHH, "Description" , "Something")
elements.property(elements.NOBODY_PT_HHHH, "Flammable" , 0)
elements.property(elements.NOBODY_PT_HHHH, "HeatConduct" , 0)
function heat(i,x,y,s,n)
type = tpt.get_property("type", x + math.random(-3,3), y + math.random(-3,3))
if type == tpt.el.fire.id then
tpt.set_property("temp", 745.15, x + math.random(-3,3), y + math.random(-3,3))
tpt.parts[i].type = 0
end
end
tpt.element_func(heat,elements.NOBODY_PT_HHHH)

Interesting... I works fine for me. I'm not sure why that would happen

I am not really sure...

elements.property(elements.DEFAULT_PT_LOXY, "Flammable" , 1000)

works to change what temperature LOXY burns at but when I did that with HYGN it does not work so I don't know...