Install Floor Aluminum Boat Im Planning To Install A Ventillation System In My Home. Which Is Better DVS Or HRV?

Im planning to install a ventillation system in my home. Which is better DVS or HRV? - install floor aluminum boat

I have a three-bedroom, 1 TB House with 100 m² living space, I noticed in the form of aluminum and glass. I asked my friends, and they have different opinions on both systems. this is a cheaper and better?