HVAC Return Loop

[Michael Scher]

Greetings All,

I'm trying to reach an HVAC tech on this, in the meantime, I'd appreciate your feedback. I did an 11mos. warranty inspection and found this.

A split unit a/c servicing the upstairs has a duct that appears to loop from the supply to the return with no branches. A weighted damper is installed in the middle of the run.

Has anyone seen this?

[Jim Luttrall]

Yes, usually part of a zoned system to allow pressure bleed off when part of the system is off.
What is your question?

[Ted Menelly]

Greetings All,

I'm trying to reach an HVAC tech on this, in the meantime, I'd appreciate your feedback. I did an 11mos. warranty inspection and found this.

A split unit a/c servicing the upstairs has a duct that appears to loop from the supply to the return with no branches. A weighted damper is installed in the middle of the run.

Has anyone seen this?

Love that sediment trap, sideways, not traps, cleanouts or venting and I love the idea of the duct being on top of the unit to keep it warm/cold, and the foam blocks the entire unit is supported by.

Oh yeah, back to the question, As Jim said, I think, ballancing the system