How helpful is an indoor air filter for allergies?

Orek has one for $700 that is supposed to filter air in your whole house. My 2500 sq ft house it tight in that stays warm without much heat in cold winter, so I am thinking this air filter might help bad allergies. We also have a dog. What do you think?
3M makes filters that you put into your A/C unit. They cost about $10 and are sold at home depot, ace hardware and lowe's. You are better off filterting the air that runs through the a/c than trying to filter it room by room. Change the a/c filters on
wwhrd | May 10, 2007



