This terrible installation was done by someone who was never properly trained, who lacks of slightest respect to the profession he dedicated his life to. Sometimes it’s just enough to go to the next door house and see how it’s done – learn thing or two! But obviously this installer never bothers.
In my Ductwork Installation Guide you can find several examples of similar installation. Most likely in the situation like this one, I would use two Oval 45-s, a Round to Oval End boot and a Take-off. Instead of the guy created this terrible monster!
Of course the plumber created some mess and made installation more challenging. But if the installer gave himself a minute and set up a furnace in the right spot he could avoid the whole bunch of unnecessary “jumpers”!
Also, this pro doesn’t know that he can use duct reducers for the take-offs – so stupid.
Now look at the thermo-ply. At the corner he fastens it with five screws! Two would be more than enough, leave alone he should be using staples instead.
Installation of this cold air jumper is just incredible! Obviously he doesn’t know how many cold air returns can handle a single joist cavity. This is why he connected the jumper duct to the main one by both sides!
Because he used an important joist cavity unnecessarily, he didn’t have a choice, but run this jumper as a triple one and instead of 5 elbows he used 11!
These heat runs don’t look very neat, do they?
This jumper is done only because he never learned that he could tap in a take-off onto a transition.
Two inch PVC pipes better to keep shorter, then installation looks better.
As you can see a cold air drop isn’t straight. Such a stupid mistake!
This is a cold air jumper. Why he wasted 7” materials and extra time instead of simply extending thermo-pan sheeting to this point we most likely will never know…