Air Purifiers

I work at a manufacturing company and I am having too many problems with sinus infections, headaches, and breathing problems. I need something that is cost-effective and that really will work since I will probably have to purchase it myself.

I have terrible allergies and have been sick since forever. I have breathing problems, tiredness , etc. I have dogs, smoke in the house, and lots of dust. I need help. i am sick of feeling like crap, please help me.