( I know I should be calling the AHJ on this one, but conveniently, they're closed on Friday - my tax dollars at work 
- hoping I can get a quicker answer here )
In the middle of a down-to-the-studs remodel, and currently designing my single-dwelling unit garage-based air-handler and takeoffs from it. Pretty typical (see attached images - supply trunks are gray, return air in ice blue): the air handler takeoffs penetrate the ceiling and then the supply trunks run through the floor/ceiling trusses penetrate horizontally into the kitchen and living room, and also provides a supply/branch trunk to the upper-floor room over the garage.
Basic question: where are fire/smoke dampers required ? Reading Chapter 6 of the mechanical code and Chapter 7 of the building code doesn't really make it clear what's needed (if anything) for a single dwelling unit.
- hoping I can get a quicker answer here )In the middle of a down-to-the-studs remodel, and currently designing my single-dwelling unit garage-based air-handler and takeoffs from it. Pretty typical (see attached images - supply trunks are gray, return air in ice blue): the air handler takeoffs penetrate the ceiling and then the supply trunks run through the floor/ceiling trusses penetrate horizontally into the kitchen and living room, and also provides a supply/branch trunk to the upper-floor room over the garage.
Basic question: where are fire/smoke dampers required ? Reading Chapter 6 of the mechanical code and Chapter 7 of the building code doesn't really make it clear what's needed (if anything) for a single dwelling unit.
