Where To Position The Main Trunk? - HVAC - DIY Chatroom Home Improvement Forum


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 02-11-2009, 11:32 PM   #1
Member
 
Join Date: Jul 2008
Posts: 233
Rewards Points: 150
Default

where to position the main trunk?


in my basement, there are two main beams. i want to run the main trunk under one of these. when the branches cross the other beam, should i use two 45 degree elbows to get the duct up between two joists?

would having the main trunk closer to one side of the basement so that the braches are approximatley twice as long on one side rather than the other be ok? (i have not done the duct calculation yet, waiting on blower specs)

how far can the pvc flues on the newer furnaces run horizontaly in the basement before exiting the house?

how do i cross under the return main trunk with the supply braches?

Advertisement


Last edited by drewhart; 02-11-2009 at 11:34 PM.
drewhart is offline   Reply With Quote
Old 02-12-2009, 05:17 AM   #2
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,443
Rewards Points: 4,532
Default

where to position the main trunk?


Best to use 45's.

You can have one side loner then the other.

The allowable vent length varies with the furnace brand and model.

Advertisement

beenthere is online now   Reply With Quote
Old 02-12-2009, 09:35 AM   #3
Member
 
Join Date: Jul 2008
Posts: 233
Rewards Points: 150
Default

where to position the main trunk?


will there be a manual with all this stuff in it with the furnace? do they the all give figures for the external static pressure?
drewhart is offline   Reply With Quote
Old 02-12-2009, 03:16 PM   #4
An old Tradesmen
 
Join Date: Oct 2008
Location: PA
Posts: 26,443
Rewards Points: 4,532
Default

where to position the main trunk?


The furnace manual, will give you the CFM at different static pressures.

No other duct instructions though.
beenthere is online now   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
This doesnt seem right. JoulesWinfield Electrical 27 07-26-2009 08:40 PM
Main Service Disconnects rwlawrence Electrical 5 11-04-2008 11:46 AM
Adding ground bar to main panel WoodworkerDave Electrical 6 09-27-2008 05:52 PM
Replace main panel? And lots of other ?s Bcoleman6 Electrical 13 01-22-2008 10:40 AM
main lug vs main breaker for sub panel diyll Electrical 1 01-17-2008 09:18 PM




Top of Page | View New Posts