I've read all the posts - can't possibly be phosgene gas.
Does anyone have any thoughts??
But after sealing the air return and all vents the noxtious odor all but disappeared.
My nose is good. It is not mold - unless mold smells like phosgene gas.
Definately a chemical.
I felt burning eyes, throat and "high" -not pleasantly.
Odor was first noticed in Oct. and never dissipated, even worse with warmer weather.
It is a heat pump system, unit is inside.