You don't insulate the floor, you insulate the basement walls and headers.
Can add vents but add too many and doing so will negatively impact the first floor.
Basements don't need much heat if the air leakage and heat loss are taken care of.
Can add vents but add too many and doing so will negatively impact the first floor.
Basements don't need much heat if the air leakage and heat loss are taken care of.