Humidifier Install - Aprilaire 600 (okay to reduce 6" bypass to 4"?)

Reply

  #1  
Old 02-16-18, 06:49 PM
S
Member
Thread Starter
Join Date: Jul 2017
Location: United States
Posts: 11
Received 0 Votes on 0 Posts
Humidifier Install - Aprilaire 600 (okay to reduce 6" bypass to 4"?)

I'm replacing an old Honeywell TrueSteam with a new Aprilaire 600. The Honeywell has a 1" bypass duct that connects to the furnace's supply plenum, directly above my furnace (upflow). The Aprilaire calls for a 6" bypass duct. Unfortunately, the supply plenum above my furnace is too small for a 6" circular cut. I could fit a 4" hole, which would require a 6" to 4" reducer. Would this significantly reduce the efficiency of the humidifier? Is there a chance of this setup damaging my new humidifier or A/C system? Alternatively, a rectangular duct would fit. Would a 6" to 10" x 3.25" duct be a better option?

Thanks in advance for any recommendations or guidance.
 
Sponsored Links
  #2  
Old 02-16-18, 07:04 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 59,069
Received 1,109 Votes on 1,029 Posts
Would a 6" to 10" x 3.25" duct be a better option?
Yes. Much less of a reduction than a 4" connection.

A 4" connection would work. It wouldn't damage anything but from the reduced air flow..... you'd have less moisture transferred to the air and more wasted water coming out of the drain.
 
  #3  
Old 02-20-18, 04:35 PM
S
Member
Thread Starter
Join Date: Jul 2017
Location: United States
Posts: 11
Received 0 Votes on 0 Posts
Went with the 10 x 6 rectangular ducting. Still working on the install, but got this duct installed and it looks pretty clean. Thanks to PJMax for the recommendation!
 
  #4  
Old 02-20-18, 08:00 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 59,069
Received 1,109 Votes on 1,029 Posts
You're welcome.
Looking forward to hearing about the completed job and lots of humidity in the house.
 
Reply
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
 
Ask a Question
Question Title:
Description:
Your question will be posted in: