HVAC(Heating,Ventalation and A/C0 Questions.

Viceline · #1 10-11-2009, 11:54 PM

Just wanting to help out and answer any HVAC questions the community might have. Filter questions as well.

mihjaro · #2 10-12-2009, 07:28 AM

What's the best way to rout duct through a single sheet of 1/2 drywall so there is a duct connection on each side?

I've tried using starter collars (the kind with the tabs you bend and that have a flange) and they are great for one side but don't work great for me when I try to attach another starter collar on the opposite side of the drywall.

Straight up G · #3 10-12-2009, 07:47 AM

Quote:

Originally Posted by mihjaro

What's the best way to rout duct through a single sheet of 1/2 drywall so there is a duct connection on each side?

I've tried using starter collars (the kind with the tabs you bend and that have a flange) and they are great for one side but don't work great for me when I try to attach another starter collar on the opposite side of the drywall.

I use these

http://cgi.ebay.co.uk/ws/eBayISAPI.d...id=55968779026

Straight up G · #4 10-12-2009, 07:52 AM

Quote:

Originally Posted by Viceline

Just wanting to help out and answer any HVAC questions the community might have. Filter questions as well.

I want to heat my grow space but putting this heater in the 2x4 closet Im sure is a fire risk?

I am going to get a plug in thermo for it do you think if I plugged the heater in to an extension inside the closet but had the heater positioned outside the closet in front of a passive inlet it would all work ok?

Thankyou.

http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT

mihjaro · #5 10-12-2009, 08:04 AM

I get a stock ebay page with this. No item listed. What are those things called? The duct connectors that is.

Straight up G · #6 10-12-2009, 08:41 AM

How about now

http://cgi.ebay.co.uk/WALL-PLATE-WIT...4.c0.m14.l1262

guise · #7 10-12-2009, 10:01 AM

use a coupling. you'll have to make one out of round pipe. cut to length, snap together and crimp the un-crimped ends.

build a bay pan. you'll use sheet metal or "thermopan" to build out the area and secure it to AT LEAST 2 studs. this will be done on both sides. then mount 2 collars on the pan. ( hvac guys think "wall return" )

Viceline · #8 10-12-2009, 12:08 PM

Goin threw 1/2 sheet rock you just want to make sure you sheet metal pipe(k/D pipe)4"-12" is long enough to connect on both sides. Dont short yourself. About 4inches on both sides of the wall is good so 12-14" total length will work. Then you wanna crimp both sides so duct slips on to pie very easily. Im trying to picture what your doing with limited info. Crimpers are expensive and so are sheet metal snips so I hope you have those already.

Viceline · #9 10-12-2009, 12:15 PM

Guise has it. The wall plate is ok but is just gonna cause the wall to fill up with what your exhaisting or bringing in. K/D pipe sold at home depot crimped on both ends should work nice. Metal tape or duct take to seal the edges of the pipe going through the wall will help control odor and light sepage aswell.

mihjaro · #10 10-12-2009, 12:56 PM

Quote:

Originally Posted by guise

use a coupling. you'll have to make one out of round pipe. cut to length, snap together and crimp the un-crimped ends.

build a bay pan. you'll use sheet metal or "thermopan" to build out the area and secure it to AT LEAST 2 studs. this will be done on both sides. then mount 2 collars on the pan. ( hvac guys think "wall return" )

The hole is actually going though the ceiling into the attic.

That was why the straight pipe didn't seem to work because there's nothing for it to keep it from falling into the room below the hole.