Cutting into existing return and supply


Old 08-21-19, 08:20 PM
Thread Starter
Join Date: Feb 2019
Location: United States
Posts: 18
Received 0 Votes on 0 Posts
Cutting into existing return and supply


I have a couple questions.
I have read that it is not a good idea to tap into an existing supply line as it will steal air from the original room, but is it okay or common to tap into a existing return line or do I need to go back to the plenum?
Is it actually against code to go into either?
I am finishing a basement and really not worried about the supply line taking too much air from the original room as it is from a very open concept area of the house and has a few other runs. It would be much easier than running a whole new line.
Sponsored Links
Old 08-22-19, 07:38 AM
airman.1994's Avatar
Join Date: Dec 2005
Location: VA
Posts: 5,767
Received 4 Votes on 4 Posts
Best practice HVAC is to go back to the main every time unless it is designed to handle both runs.

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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

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