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Interpretations Request Input

Original Request

  • Request ID: 8520
  • Requested By: Gisell Basilio
  • Requester E-Mail: gbasilio@rcieng.com
  • Code Version: 2021
  • Code: ENERGY
  • Code Description:
  • Chapter:
  • Section: R403.13.1
  • Topic: Ducted Dehumidifiers
  • Question: Is it the intent of Section R403.13.1, exception 3 to not allow the connection of a dehumidifier to or from the main return duct of a split system?
  • Comment: It is more difficult to dehumidify colder air (55F supply air vs 75F return air), even though the supply air is saturated. Also, some manufacturers recommend the installation of the dehumidifier only on the return side of the system or from the return duct to the supply duct of the central system. See attachment.
  • Attachment 1: Download

Existing Interpretations and/or Declaratory Statements Related to this request

Input Received:

Yes. The intent is to not connect the dehumidified warmer air into the return air of a split system.
Pedro Quintela on 04/02/2021 at 4:41 PM
Yes, it seems clear that it is prohibited to connect a ducted dehumidifier to or from the return duct of the central system.
Michael Grimm on 04/21/2021 at 4:23 PM

Answer:

Yes. The intent is to not connect the dehumidified warmer air into the return air of a split system.
On 04/23/2021 at 12:19 PM

Commentary:

None.

Comments on Draft:

Agree
Linda Patrick on 04/23/2021 at 1:24 PM
Agree
Pedro Quintela on 04/23/2021 at 1:36 PM
Agree
Thomas Allen on 04/23/2021 at 1:52 PM
agree
Michael Grimm on 04/23/2021 at 2:41 PM
Looks good
Andrew Bruhn on 04/23/2021 at 8:04 PM
Publish Draft Interpretation