[Altavia]

Originally Posted by StamperTV25

I am not concerned about the one inch....it is about the other connection points going up to the roof. We have built many homes and always did a pre-drywall inspection to verify things were done correctly and to code. These homes are released when they are completed.....so if found to be incorrectly installed.....it will need to be reinstalled.

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.

[retiredguy123]

Originally Posted by Altavia

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?

[Altavia]

Originally Posted by retiredguy123

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

[SeanInFlorida]

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.

[StamperTV25]

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.

[Malsua]

Originally Posted by StamperTV25

We will be coming up to TV to purchase a new home this coming week. The question I have is for those that have noticed the dryer vent pipe looks to be installed with the crimped end on the vent pipe sections facing down instead of upwards toward the roof. I have always had homes with the vent piping installed the crimped ends facing towards the roof vent.....that way allows air to flow freely through the pipe without any obstructions. If the crimped end is facing down....or against the air flow.....the lint would naturally collect on the crimped ends of the pipe sections. I don't know if anyone else has addressed this?......but would love any feedback. I tried to attach a photo.....hopefully it shows up.

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.

[DrHitch]

Originally Posted by Malsua

....ended up getting a male to male coupler anyway instead of an extender. With periodic maintenance, it won't be an issue.

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

[jimmy o]

Originally Posted by StamperTV25

We will be coming up to TV to purchase a new home this coming week. The question I have is for those that have noticed the dryer vent pipe looks to be installed with the crimped end on the vent pipe sections facing down instead of upwards toward the roof. I have always had homes with the vent piping installed the crimped ends facing towards the roof vent.....that way allows air to flow freely through the pipe without any obstructions. If the crimped end is facing down....or against the air flow.....the lint would naturally collect on the crimped ends of the pipe sections. I don't know if anyone else has addressed this?......but would love any feedback. I tried to attach a photo.....hopefully it shows up.

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.

[Malsua]

Originally Posted by jimmy o

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.

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.

[Andyb]

Vent pipe should always fit over the dryer discharge pipe.

[RRGuyNJ]

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.

[NoMoSno]

Originally Posted by RRGuyNJ

In the end, who knows?

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

[retiredguy123]

Originally Posted by Andyb

Vent pipe should always fit over the dryer discharge pipe.

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?

[Accidental1]

Originally Posted by StamperTV25

We will be coming up to TV to purchase a new home this coming week. The question I have is for those that have noticed the dryer vent pipe looks to be installed with the crimped end on the vent pipe sections facing down instead of upwards toward the roof. I have always had homes with the vent piping installed the crimped ends facing towards the roof vent.....that way allows air to flow freely through the pipe without any obstructions. If the crimped end is facing down....or against the air flow.....the lint would naturally collect on the crimped ends of the pipe sections. I don't know if anyone else has addressed this?......but would love any feedback. I tried to attach a photo.....hopefully it shows up.

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.

[Lgellar]

Originally Posted by retiredguy123

The code says that the inside of the duct must be "smooth", but it is somewhat unclear as to whether the end can be crimped. It appears that some installations use a smooth end and others use a crimped end. If you want to make the inside of the vent pipe to be more smooth you can use a plastic transition piece between the flexible dryer duct and the crimped metal pipe. This transition piece will fit inside of the metal duct. But, I tend to agree with Poster No. 7 that it is probably insignificant.

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