Heat Smells Like Chlorine/Chemical

[rpena07G35x]

I just recently purchased an 07 G35x. When I took it for a test drive, I noticed a smell that was similar to chlorine...my husband thought it was more of a musty smell, but I'm sticking with chlorine. I fell in love with the car and figured they would detail it before giving it to me and the smell would be gone. Needless to say, I can still smell it. I have been trying to do some research and I am getting mixed answers like exhaust, cat or leaking heater core. Any ideas?

[Rogue One]

Start with the easy stuff first. I'd start with changing the cabin air filter.
BTW, is their any staining in the floor? Maybe there was a spill that wasn't cleaned up properly.

[youtube]http://www.youtube.com/watch?v=3I5RL0VbYe8[/youtube]

[SVTCOBRA]

couple years ago my Coupe sat covered in snow for several days. When I finally got it out on the road, smelled a very unusual smell....not good... Also, the air coming out of the vents seemed to be at less velocity. So, I checked the cabin filter which you could see from inside the engine compartment. Seems a mouse was making a NEST on the filter!!! So, I was smelling mouse poo and pee. Changed the filter and sprayed some freshener down there and was all better.