4 in. to 6 in. Soffit Exhaust Vent

Well.... Yes and No. This is just an exhaust vent, nothing more, YOU have to determine what is OK and what is not OK to use this for. It is not listed as a a kitchen hood vent and because of the case in which a fire could take place, plastic is not your go-to in any case. That said, I am using this for a Microwave vent hood and I feel confident that this use is OK, BUT you will get greasy residue on the underside of the soffit. Since all microwaves have grease catchers and fire arresters (marginal) installed, the risk of a fire or overheated air is less than through a real range hood. For casual use with a microwave, i am comfortable with this vent, if this was a full hood, I would use a roof vent.

this is an exhaust exit used with a fan that will blow open the spring loaded soffit vent

yes

First thing is what brand of fan did you buy? Second is what is the scone rating. A cheap fan is loud. I prefer 2 scones and under. A four foot run should not restrict the flow at all unless you there is a 99 degree bend in the duct to to point to where you vented it out of the house. If that's the case, then turn the unit around so the exhaust point toward the exit point. If you can't rotate it, the by a 4" to 6" adapter and run 6" flex from the unit straight for about 3 ft and then begin a gradual turn toward the exit point. The exit point should be a straight shot as well. I'm just going to throw this out there, did you take the tape off the flapper inside the exhaust flange? That for sure will cause that problem

I would not recommend this for that application. Dryers need a freer flow of air to work properly and the back pressure created by the spring loaded damper would increase the back pressure. Plus there is a concern over the higher temps; at least over time they could have an impact. If you removed the spring and damper from this product, perhaps my recommendation would change, but there are other products that are a better fit at that point. If it was me, I would definitely not use this product for a dryer exhaust.

no not to code

Been using this for about a year on my dryer. I would NOT use it on a gas dryer

Yes ours is installed like that and works just fine.

It should. I have a similar setup but a slightly longer run and 10 more CFM and there’s been no issues having this product vent properly. The doesn’t open as far as I thought it might, but you can feel plenty of air flow. My lateral run is with insulated flexible 4” as well.

You can use the Vent inner flange as your pattern. The face flange should be larger than the hole the Vent duct is mounted in.