I've just removed the entire equation from the game, 10% loss, 15% loss, Not Concerned, HVAC is King Imvho and ducting, heavy hoods, intake fans, exhaust fans, etc are unnecessary, Id rather have less equipment, more room, less work, cleaning glass sucks ass! Changing lamps on alot of hoods sucks ass!
The hinged ones are cool but still I dont like ducting them, or how much they weigh.
To each his own though that's just how I do it after trying them all from Life Light Spinners to XXXL Magnums and Melon Heads and everything in between. Ive settled in real nice with the 5 oz Adjust wings.
Less is More keeps ruling my world!