Yorkies don't have 'dander' like other dogs and cats. If your husband is having trouble it's probably because Emmit is still a puppy and he's losing his puppy hair. The soft puppy hair is lost until somewhere around 8 to 10 months I believe. Yorkies have hair like humans so when his adult coat is all the way in I bet your husband will be fine.
Is there a family member or friend who could keep him for you for a while and see what happens later?
I mean could they keep Emmit...not your husband...or, well, whichever would work best I guess! LOL!