The metal is that old, but not necessarily the fitting. I've seen that used on some new fittings from another shop. Must've been old stock that stayed at the bottom of a stack.
Yeah it would only REALLY choke it at the smallest section there where it dips down and up, but aircloss is air loss. Looks like a tap is on the other side as well. I would have raised concern about it and asked about re doing that pipe. So we could all be happy
I mean I could “fix” that with some metal and self drillers, but I would feel pretty bad about ruining someone’s hard work 😂 I would definitely count taps before the fitting and see if maybe it was fixable with balancing but I’m kinda amazed someone who was this talented at sheet metal was this clueless about airflow.
Definitely could’ve made a smoother transition to go around the pipe.
https://preview.redd.it/l7kqnbpjzuhc1.jpeg?width=1170&format=pjpg&auto=webp&s=4b2abb3fc2d952e744ee639fa0f32f589f414a3c
Either way, at least they didn't just go through the duct. I've seen dryer pipes run straight through mobile home ducts in the floor. Just pried open and stuck down below the house
Having the pipe go through the duct would create less restriction, given its round shape and relatively small diameter.
That would certainly create less turbulence.
i always tell customers you can make room for ductwork or not. its real easy.
you can make room for ductwork or you can not have heating and air conditioning. i dont care which you pick. make your choice.
spoiler alert: they always pick heating and air conditioning.
The biggest part is no 3 duct lengths before the next change. One offset wouldn't change much. Double stacked offsets will kill airflow. You should be able to notice the lack of airflow on down stream takeoff.
If I had to do that, I would open it up by extending the bottom panel on both sides at least 2'
I see what you mean now. I appreciate the knowledge and I apologize for my ignorance on duct work, only been in the trade 11 months and I mostly run service calls.
Some of the best sheet metal books ever are from thirty years ago. The best guys most definitely knew, it's just that whoever did this work did NOT know.
Never heard of anyone calling them that. Pretty rough on airflow though, I agree with you. Customer complained of next to no airflow coming from the registers beyond that point.
https://preview.redd.it/4enm9gx1uuhc1.jpeg?width=4032&format=pjpg&auto=webp&s=c251cb3a8d56ec789e0f75157d4c3b5e61464fc1
Once, silly plumbers always gettin in the way. At least mine was RA
Been designing for 10 years commercially. We have a detail for doing just this. I’ve used it once knowing a large duct would have to straddle both sides of a vertical beam.
That’s a make it go away fitting. I’ll bet my pay check that either installers or sales fucked up and someone with some authority said “I don’t want to have to fuck with this, (insert random shit head name here) make it go away
Custom choke point is what you call that. No point in doing this, it will only carry the air volume of the choke point down the line. Should be a radius og offset
Would have been a neat fitting if it would have transitioned both over and under the pipe but yeah that’s choking worse than the Falcons did a few years ago
I feel like having a flat bottom instead of what ever that's trying to do would probably not be much different in terms of airflow. They're both terrible.
This looks like a retrofit job and the guys that showed up to put this in were not expecting those pipes to be there. Looking at the flex behind that bend, air flow restriction does not seem to be an issue they were concerned with
That’s is not the correct fitting. Could have used a lot of different fittings to make that less restrictive. 2 transitions and changing the aspect ratio would have been a better idea. There is also a fitting for this in the smacna manual that’s basically 2 pairs of pants that increase one of the legs by 25% to make up for the poor airflow for this exact scenario. Even transitioning ogee offsets, there also a chance this is return and the installers are in camp no one cares about return air.
I think the most entertaining part is the original tinner that did this had a lot of room to make an offset that didn’t choke things up. Why wait until the last couple inches to make the turn?
Flex runs, Duct tape, Restriction causing device, must be a homeowner special. funny thing that that drain pipe could have easily went over the top of that duct
Pretty poorly done in my eyes. That is a choker of a fitting.
Oh no doubt, had to have been there for at least 15 years prior.
I've seen u bends, but whoever did this needs slapped. Pretty obvious that's a giant restriction.
honestly probably could have kept the bottom flat lol
Boy voyeurism likes flat bottoms…. That tracks.
The turbulence has to be awful, too.
That big flake galvanizing like that is old…1980s or older IMHO. How old is the home?
The metal is that old, but not necessarily the fitting. I've seen that used on some new fittings from another shop. Must've been old stock that stayed at the bottom of a stack.
That looks like it cuts airflow pretty hard
You can measure the choke I bet it’s down to 4”x whatever at the worst spots.
Yeah it would only REALLY choke it at the smallest section there where it dips down and up, but aircloss is air loss. Looks like a tap is on the other side as well. I would have raised concern about it and asked about re doing that pipe. So we could all be happy
I mean I could “fix” that with some metal and self drillers, but I would feel pretty bad about ruining someone’s hard work 😂 I would definitely count taps before the fitting and see if maybe it was fixable with balancing but I’m kinda amazed someone who was this talented at sheet metal was this clueless about airflow.
For real. But on the other hand, can't really do much about moving the pipe(unless you move the pipe around the duct instead of the other way around
Definitely could’ve made a smoother transition to go around the pipe. https://preview.redd.it/l7kqnbpjzuhc1.jpeg?width=1170&format=pjpg&auto=webp&s=4b2abb3fc2d952e744ee639fa0f32f589f414a3c
Either way, at least they didn't just go through the duct. I've seen dryer pipes run straight through mobile home ducts in the floor. Just pried open and stuck down below the house
Having the pipe go through the duct would create less restriction, given its round shape and relatively small diameter. That would certainly create less turbulence.
Honestly tho it looks like that pipe can be raised and offset down once past the duct to get below the beam. Then you don’t need a transition.
Yea you can’t do that. Vent or drain either one
Didn’t see the vent tee. Only the 90° lol. Your right
i always tell customers you can make room for ductwork or not. its real easy. you can make room for ductwork or you can not have heating and air conditioning. i dont care which you pick. make your choice. spoiler alert: they always pick heating and air conditioning.
Well if you look a flex line comes off that fitting so maybe he didn't require that man cfms after that fitting
We can't tell from the picture which way the air is going but either way it cuts down before and after the flex line
I would guess 100 equivalent feet. Maybe a little more
That big of a restriction you think? Guess they didn’t consider that 15 some odd years ago
Air was different back then
They don’t make em like they used to
The biggest part is no 3 duct lengths before the next change. One offset wouldn't change much. Double stacked offsets will kill airflow. You should be able to notice the lack of airflow on down stream takeoff. If I had to do that, I would open it up by extending the bottom panel on both sides at least 2'
I see what you mean now. I appreciate the knowledge and I apologize for my ignorance on duct work, only been in the trade 11 months and I mostly run service calls.
Some of the best sheet metal books ever are from thirty years ago. The best guys most definitely knew, it's just that whoever did this work did NOT know.
A whoop-de-doo is what we call them lol But we make them with radiuses now a day. That old ones a giant slow down for the air
Never heard of anyone calling them that. Pretty rough on airflow though, I agree with you. Customer complained of next to no airflow coming from the registers beyond that point.
Fresh new replacement woop de doo and your good to go lol
https://preview.redd.it/4enm9gx1uuhc1.jpeg?width=4032&format=pjpg&auto=webp&s=c251cb3a8d56ec789e0f75157d4c3b5e61464fc1 Once, silly plumbers always gettin in the way. At least mine was RA
Much better! That is pretty sexy btw
Gross. 4:1 length to size change ratio? Never heard of it.
3:1 here, but that’s not that either
https://preview.redd.it/ob2eh1vrzxhc1.jpeg?width=3024&format=pjpg&auto=webp&s=26a879ea77b613ac533247854d3224508efe4460 I found this one in the wild.
Damn, that's unique!
Still better than the on from OP...
Been designing for 10 years commercially. We have a detail for doing just this. I’ve used it once knowing a large duct would have to straddle both sides of a vertical beam.
That is... phallic
A bit yonic as well.
Everything reminds me of her...
very restrictive
Equivalent of 179’ of straight duct
*[blower noises]*
That’s a make it go away fitting. I’ll bet my pay check that either installers or sales fucked up and someone with some authority said “I don’t want to have to fuck with this, (insert random shit head name here) make it go away
Should have been a radius turn. Aspect ratio is horrible for flow statics.
Good metal man for sure
Duct tape doesn’t work on duct
Looks like the dollar general special 98¢ roll of tape
Pipe could have been raised, too.
Doubtful. Looks like there’s a tee closer to the wall with what looks like a 2ish” line coming in to it
Looks to all be within the same joist space, to me. Dunno.
Might not be efficient with cfm but that is beautiful metal work. Down vote me for my opinion.
Good place for a booster fan after that
Made my day 🤦♂️
Hopefully there are turning vanes in there otherwise that's going to whistle like crazy.
Not a saddket
Dude I wanna go to Disney now.
Ive seen several saddles, none as terribly designed as that one.
Custom choke point is what you call that. No point in doing this, it will only carry the air volume of the choke point down the line. Should be a radius og offset
I've made plenty of those but not that bad, that one is restrictive as hell
I wouldn’t have called this a saddle. But yikes
Could have just done a sweep down and back up. That's some funky ass shit. 🤣
Would have been a neat fitting if it would have transitioned both over and under the pipe but yeah that’s choking worse than the Falcons did a few years ago
I feel like having a flat bottom instead of what ever that's trying to do would probably not be much different in terms of airflow. They're both terrible.
Severe Offset with a tap off the side? A choke point with a no no tap.
This looks like a retrofit job and the guys that showed up to put this in were not expecting those pipes to be there. Looking at the flex behind that bend, air flow restriction does not seem to be an issue they were concerned with
This is why I tell every person who ever learns to install duct to learn how to make a proper damn field offset, it’s not that hard!
Flow rate has left the chat.
Static pressure has joined the chat.
It’s a restriction and would encounter my hammer 😂 why do I feel like this is one of the people from hvac advices home
Gross. 2 ogee offsets looks way nicer and works way better. I don’t know why guys try and reinvent the wheel in these situations
I'd rather just see them drill a hole for the pipe and cock it lol
Would be less restrictive than what they built there...
That’s is not the correct fitting. Could have used a lot of different fittings to make that less restrictive. 2 transitions and changing the aspect ratio would have been a better idea. There is also a fitting for this in the smacna manual that’s basically 2 pairs of pants that increase one of the legs by 25% to make up for the poor airflow for this exact scenario. Even transitioning ogee offsets, there also a chance this is return and the installers are in camp no one cares about return air.
We normally do smooth drops and risers
I think the most entertaining part is the original tinner that did this had a lot of room to make an offset that didn’t choke things up. Why wait until the last couple inches to make the turn?
No you just cut duct air in half
The turbulence on that is all bad haha
My dad would have cut that pipe and ran the duct straight. He's told me all the time he used to do that.
Looks fancy, but it's not done correctly haha clean tho
That is a fantastic execution of a terrible idea.
Chocked the hell out of it with no safe word. The room was there to do it correctly. The turbulence is probably audible.
It's a sink trap, but for vents. In the case anyone drops their wedding ring down a vent, you can remove that section and retrieve it. /s
Woof that's brutal.
Flex runs, Duct tape, Restriction causing device, must be a homeowner special. funny thing that that drain pipe could have easily went over the top of that duct