Functioning center NACA Duct

[Paul Proefrock]

I am trying to develop a functioning center NACA duct, including a flapper valve to turn it off if desired. Since I am a proud owner of a RCR that is less than two years old, I don't have my A/C system yet. I am not able to measure or determine how much space it takes.

To someone that has installed the Evaporator/Heater unit, can someone tell me how much space is there between the evaporator/heater and the front wall. How much space do I have to work with?

[Wolfgang Knierem]

Great question , hopefully someone will answer. I want to make mine functional too