Cutting HVAC Vent? - HVAC - DIY Chatroom Home Improvement Forum
Advertisement


Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > HVAC


CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Display Modes
Old 12-17-2012, 05:12 PM   #1
Newbie
 
Join Date: Dec 2012
Posts: 8
Rewards Points: 10
Default

Cutting HVAC vent?


I am finishing a room (except ceiling which has been painted black), and I am installing a vent hood and the end of this duct work is about 2 inches too long. It looks like there is about 3' of extra ductwork that doesn't go anywhere, the last vent is in the picture:



So can this be cut and capped off like it is now? How would you cut it? I only need to cut maybe halfway down the first portion of before the support bracket.

Advertisement

-MG- is offline   Reply With Quote
Old 12-17-2012, 07:06 PM   #2
Member
 
Join Date: Oct 2011
Location: PA
Posts: 5,918
Rewards Points: 582
Default


we use a nibbler...you could left ,right,and straight cutters...electric shears,,or you could remove last section of trunk line cut cap and reinstall it..ben sr

Advertisement

ben's plumbing is offline   Reply With Quote
Old 12-17-2012, 08:19 PM   #3
Newbie
 
Join Date: Dec 2012
Posts: 8
Rewards Points: 10
Default


And it's no big deal to do that? My only question is why did they install the extra portion.?
-MG- is offline   Reply With Quote
Old 12-17-2012, 09:09 PM   #4
Roofmaster
 
Join Date: Oct 2012
Location: Maryland
Posts: 3,705
Rewards Points: 2,168
Default


If you dont have a nibbler, and most DIYers Dont, Maybe you have a right angle grinder? Bosch makes a great one. Install a thin sheet metal blade, square down and across and cut that sucker right off. Wear safety glasses and don't start a fire.
__________________
" Most people would rather die than think, and most do " Bertrand Russell

jagans is offline   Reply With Quote
Old 12-17-2012, 09:15 PM   #5
Member
 
Join Date: May 2010
Location: winnipeg manitoba canada
Posts: 800
Rewards Points: 542
Default


Quote:
Originally Posted by jagans View Post
If you dont have a nibbler, and most DIYers Dont, Maybe you have a right angle grinder? Bosch makes a great one. Install a thin sheet metal blade, square down and across and cut that sucker right off. Wear safety glasses and don't start a fire.
oh my.....
carmon is offline   Reply With Quote
Old 12-18-2012, 08:57 AM   #6
Member
 
Join Date: Nov 2011
Posts: 333
Rewards Points: 314
Default


you could also use a jig saw with a metal cutting high tooth per inch count blade. I would not use a grinder unless you have about 12 to 24 hours to perform an onsite firewatch!!!! or wet down the whole area after you are done. (father in law was a safety inspector and taught me some things!!)

one other thing to do, since you are in there, is to get some duct mastic and seal up inside as far as you can reach into the duct, then do all the outside seams of the duct, prior to installing the ceiling!!! good stuff that mastic, saves you money in the long run (but its messy to work with!!!)

as to why the duct end is so long.... here is a quote from this site

http://www.rses.org/assets/serviceap...al/630-148.pdf

Never start a branch run from the end cap of an extended
plenum. For best results, the starting collar of
a branch run should never be any closer than 24 in.
from the end cap.

have fun and be careful of your fingers, toes, eyes and ears!!!!
bobinphx is offline   Reply With Quote
Old 12-18-2012, 10:47 AM   #7
Roofmaster
 
Join Date: Oct 2012
Location: Maryland
Posts: 3,705
Rewards Points: 2,168
Default


Well if you use a jig saw, wear a mouth guard, because your teeth are going to rattle. . Platen snips are great too, once you get a starter hole. I have these in left and right, wiss, of course. I just thought he might have a grinder. Right on re the fire watch, but this is sheet metal, not much mass like grinding red iron. If he sprays water with a simple sprayer he should be fine, besides it gives him a chance to stare at the ceiling while having a beer, or a glass of schnapps. Or even a bone if hes in CO!
__________________
" Most people would rather die than think, and most do " Bertrand Russell

jagans is offline   Reply With Quote
Old 12-18-2012, 05:34 PM   #8
Member
 
Join Date: Oct 2011
Location: PA
Posts: 5,918
Rewards Points: 582
Default


Quote:
Originally Posted by -MG- View Post
And it's no big deal to do that? My only question is why did they install the extra portion.?
they did not want to do what you are trying to do ...cut trunk off ben sr

Advertisement

ben's plumbing is offline   Reply With Quote
Reply


Thread Tools
Display Modes

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Frozen Vent Pipe Ratchye Plumbing 44 01-19-2016 09:43 AM
Bathroom Vent Fan Installation - Gave up on DIY but do I hire electrician or HVAC tec pattyjos Electrical 4 08-22-2012 06:43 AM
Bathroom Vent Fan Installation - Gave up on DIY but do I hire electrician or HVAC tec pattyjos HVAC 2 08-21-2012 03:27 PM
New Roof marknok Roofing/Siding 4 08-06-2011 11:41 AM
Cutting Roof Vent for Range Fan bakerhouse Remodeling 2 05-23-2008 01:20 PM




Top of Page | View New Posts

 

Search Engine Friendly URLs by vBSEO 3.6.1