nuuvox000
Mechanical
- Sep 17, 2019
- 344
I'm a little confused by the IMC as far as a split fan coil in the mechanical closets of apartments. The code clearly allows the closet to be used as a return air plenum but then all of the materials need to be plenum rated? I don't believe all of the components in the fan coil itself are plenum rated. Plus, there is typically a water heater in the closet as well which I'm sure has components that aren't plenum rated. When I ask manufacturers about this, they all give me a big "huh?" like they've never heard of something like this before but they all build equipment with "free-air" returns and sell thousands of these every year. Has anyone run into this issue before? Am I missing something simple in the IMC that allows the closet to be used as a plenum even though the unit itself is not plenum rated?