Per FL code:

M1502.4.2 Duct installation.
Exhaust ducts shall be supported at intervals not to exceed 12 feet (3658 mm) and shall be secured in place.

The insert end of the duct shall extend into the adjoining duct or fitting in the direction of airflow.

Exhaust duct joints shall be sealed in accordance with Section M1601.4.1. Ducts shall not be joined with screws or similar fasteners. Where dryer exhaust ducts are enclosed in wall or ceiling cavities, such cavities shall allow the installation of the duct without deformation.

[url]https://codes.iccsafe.org/content/FLRC2020P1/chapter-15-exhaust-systems[/url


Let us know how it turns out.

I am not sure I understand the bolded part of your quote. Most dryers I have seen come with a flexible duct that wraps around the metal duct and is attached using a metal collar that is tightened with a screwdriver. In that case, the insert end of the metal duct would be pointed against the direction of airflow. Is this a code violation?

Good question?

Apparently that does not apply to transition ducts. The dryerbox manufacturer has directions installing in that manner and the ducts should be joined with clamps or foil tape.

I used this:

DryerFlex(R) Transition Duct

Magvents have been a great solution for some previous very tight/offset installs.

Magvent Dryer Vent - Magnetic Dryer Vent | Dryer Vent Hose Replacement

All the new construction is like that in TV. The pipe exposed has a double crimped end, so in the wall the crimps go in the direction of the airflow. They just have a crimped end exposed for ease of connection.

Thanks Sean.......I was assuming that was the reason since it can be difficult for some to attach the Vent coming from the dryer. I just thought someone currently living there would have the answer. Thanks again.

This is a common installation in the newer sections of The Villages. I am a Licensed, certified, bonded and insured home inspector and I have inspected north of 500 homes in The Villages.

Here is an example from a home on Katie Keith Loop, i.e. "Street of Dreams". I inspected this one in March. This is near Middleton, south of 470.

The older homes have just a smooth opening and people couldn't figure out how to install the pipe so ended up getting a male to male coupler anyway instead of an extender. With periodic maintenance, it won't be an issue.

Finally . A quality response!
 

Yea! Good reply....I was going to say that installing sheet metal duct with crimps reversed downwards was "to keep the rainwater flowing down the pipe into the dryer"....haha

It seems some responders do not understand the problem. Yes your photo shows the crimped end going wrong direction. In your setup each connection going all the way up and out through the roof would become a trapping point for the lint which is flowing up and out. For those that don’t get it, picture a rake; the teeth of the rake grab the grass when pulling towards you. If you turn the rake over and use the back of it the rake will just slide across the grass and catch nothing. That is the same as having crimped connection going the wrong way, the lint will get caught.

Except it's not like that. That piece that is crimped that way is only there. The rest, up through the termination vent, are male into female and taped. They added a male-to-male at the termination point because most people couldn't seem to figure it out.

Vent pipe
 

Vent pipe should always fit over the dryer discharge pipe.

You are correct
 

You are 100% correct. Unfortunately the walls are already closed in so we have no idea what's behind them. The way I understand it is if you buy a "Spec-Home" you don't have much say over what goes on and can't be on site watching the build as you can in the outside world. I certainly hope if it's a custom built home the owner can be on site to see how things are progressing.
Your photo shows what should be an onsite crimp done during installation for the flex vent to attach too and the connections are opposite within the wall and going with the air flow as you described. That crimp appears to be a factory crimp and could be a male to male adapter as mentioned earlier. In the end, who knows? Maintain it by cleaning it every few years with a rotary brush and a shop vac and you should be fine
Good luck with your move.

The county building inspector knows, as this is part of the inspection before the walls are closed in.

That is not the way most dryers are installed. The dryer comes with a flexible duct and a metal band clamp to secure it to the outside of the permanent metal exhaust duct. If you try to put the flexible duct inside of the exhaust duct it is too large to fit, and even if you get it inside, how do you secure it?

Just took mine apart
 

We're getting rid of the original washer/dryer tomorrow so I disconnected everything yesterday. I have what appears to be the exact same vent box setup (i.e. crimped end against airflow) as shown in your photo, and the one from the home inspector. We bought new in 2021. When I disconnected the flexible ducting from the vent box there was some, but not a substantial amount of lint build up.

Ventless all in one washer dryer
 

You may want to look into an all in one washer dryer that is ventless. I would recommend the GE one.