** Rehabbers - question about vents (floor, Studa vent) ***

[Christina R.]

I'm doing my first rehab for rental on a 2/1.  I have my contract with my HVAC and plumbing as well as electrical as to what needs to be done.  I'm installing CAC in this house and the sub put a floor vent in the kitchen area where the stove is going.  This is a small house; the entire above grade is 975 sq ft over 2 floors (city rowhome).  There is already a floor vent on the opposite wall as well as one about 4 feet over on the interior wall on the same side as the kitchen area/stove.

I'm going to ask him to move it across to the front of the house, under the only window on the first floor.  Our contract does not specify placement of vents.  Can anyone tell me if there is a code requirement for vents for a licensed contractor installation?  (I have texted this question but no response yet . . . ).  

Additional question -- because we are switching the placement of the sink in the only bathroom, I need - per code - to do a vent.  Does it take any  money out of the hvac's pocket to do a Studa vent in the already opened up space behind where the sink will now go versus running a stack to the roof (which I will have to pay more for my roofer to come out and do)?  

Thanks for all replies, in advance.

Christina