Thursday, January 28, 2010

...Figuring out the P-Trap depth for an Air Handler.

The superintendent came to me today asking what depth the P-Traps should be for the condensate leaving the air handlers.

The P-Trap for an air handler is not a one depth fits all kinda deal as it is in plumbing. The positive and negative static pressure has to be taken into account. If it's not, then the trap could be blown or sucked dry (no phun intended)
Our AHU supplier provides a simple formula in their submittal data shown below:

AHU Trap Depth Calculation

One issue we have now run into is the p-trap depth is below the finished floor. Soooo it looks like some hole coring will ensue to fix this issue.

Have any of you ever bumped into this?

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