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Return air duct verses fresh air intake.
There no such thing as "Return air duct verses fresh air intake". You must have both.
Questions about preferred way to insulate bare metal, between where the flex's insulation stops and up to the collar at plenum? In the picture, flex comes from the R; Collar / plenum is to the L.
Have foil back duct insulation - can use.
At the collar (using loose duct wrap), should the insulation be zipped - only? Or taped to collar, then zipped?
On this El, should the end of flex insulation be zipped against the El,
then overlap the duct wrap - several inches ? past the end of flex insulation?
The flex insulation or liner won't reach the collar, completely covering elbow (if that's what U mean). Flex insulation stops at red line (in 1st picture).
*Plenum on left (pretend)
* Green towel = foil backed duct wrap
* # 1 = flex insulation stops on El
* # 2 = duct wrap butts against plenum
* # 3 = seam where duct wrap overlaps flex insulation.
# 1: Use clamp, or tape, or both - end of flex insulation on elbow? [liner already sealed]
# 2: Clamp, tape or both - duct wrap at plenum?
# 3: How, or if to seal the seam between duct wrap & flex covering? ? Use wide foil tape, or...?
 
Peel back the outer liner and cut inner liner shorter than the insulation. After the mechanical connection and taping the insulation is pulled around the elbow.
If you do not have enough length to redo the connection just buy some R-6 or R-8 trunk insulation and wrap it around the elbows, tape it with aluminum foil tape.
Sheet metal air duct installation with samples and pictures.
Nevertheless that my entire site is dedicated to that, sometimes Google send visitors to irrelevant for their search pages! If you are one of them please look around, you are definitely going to find what you are looking for!
Sheet metal duct installers training.
Usually you can get some training on the job, but because every company trains their employees in their own unique way, you must be very lucky to get it right.
In order to offset that purchase my Ductwork Installation Guide e-book.
Should a heating and cooling company calculate new heat and return ducts for me or do it myself.
Well, if you want to pay more, then you can ask them to do it for you. Otherwise, do it on this page.
Should each cold air return be its own run?
If you are referring to the attic installation, then yes.
S-slip & drive is the same thing as an s-cleat and drive cleat?
Yep.
Tools needed to install ductwork.
In order to see all of it please go to this page.
What happens if hood fan exhaust duct is not insulated?
In a cold climate it will sweat and even freeze on the inside.
What happens if you hook a new ac unit up without replacing the ductwork?
Nothing, if a new unit is the same capacity as the old one.
What happens when I reduce then increase air duct pipe diameter?
You are going to reduce the airflow.
What if my range hood and duct pipe don't quite line up?
Sometimes it is a problem, but sometimes it is not. Please contact me on this page and I'll go over it with you.
What is difference between furnace intake and return?
Intake brings fresh combustion air to the burner; while return recycle air in the house.
What kind of cement is used on PVC pipe for venting high efficiency gas furnace?
You can use Oatey 31013 Reg. Clear Cement F/ PVC Pipe & Fittings. Buy it on the right.
What was cause air not to be distributed evenly through the ducts of he air handler in the attic of a home?
The system of ductwork in your home should be designed by Manual D. Get more info on this page.
Who do I call if I want to change the ducting in a basement, Toronto?
Here in the US they call them HVAC contractors, but in Canada? I do not know!
Why are heat pumps vents under the windows?
They put vents near the places where most of the heat losses occur.
Why do I hear a dripping noise when my furnace is running?
Well, there is nothing is dripping in your furnace or ductwork, but rather you hear a ticking noise. Find a solution on this page.
Why doesn't gas furnace kill us? I have no idea!
Maybe because it does not have a gun...
Why return duct is always larger than supply?
Manual D requires airflow to be designed based on Velocity (700 fpm on supply trunk 600 fpm on supply branch ducts 500 fpm on return ducts and 250 fpm across a filter)
This dictates the return will always be larger than the supply.
For instance a hard pipe 18" duct will deliver just over 1200 cfm at 700 fpm but you need just over a 21" pipe to deliver the same amount of air at 500 fpm.
Why would ants come thru bathroom exhaust fan?
I have no freaking idea! Maybe they just love that smell!?!
Will a drum style humidifier work with baseboard heating?
I do not think so...
Would closing a vent in a room cause damage to your ductwork?
No.
www.diyductwork.com
Well, the diyductwork.com website doesn't exist, but mine is full of DIY topics.
www.how do I run the ductwork for an indoor wood furnace.com
This question came from Grafton, Massachusetts. There is a wishful thinking that any question you may think of can lead you to a website where this single question could be answered, but it is not true!
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