Solar Ventilation Fan - Universal Fit for 3” and 4” Pipes - Portable Exhaust Fan For Porta Potty, Sheds, Dog Houses, Green Houses - Compact size 6”x6”x4.5”

Worked wonders for our out house. When the first one failed after 16 months they sent us another one.

Purchased two of these for waste vents on my house roof. I was getting a sewer smell in the laundry area, checked no clogged vent pipes. House is 55 yrs old so a bit of smell is to be expected. These apply a gentle negative pressure, the fan is about the size of a computer rear fan. Since using these there has been a lot less smell or none at all. I had to get an adapter at Homedepot to downsize the pipe diameter.

Believe the other reviews--direct sunlight REQUIRED. It whizzes along just fine with full sun, but even passing a finger over the panel and shading a few of the solar cells brings the fan to an immediate halt. I used it to replace an old sailboat solar vent that I had installed on a shed using a 4" ABS 90 deg fitting with pipe. Unlike the old failed sailboat vent it's a loose fit not a snug one on the pipe, but hopefully it'll stay on during winter windstorms. It seems to work OK when running. I held a piece of paper up to the hole on the inside of the shed and this fan sucked the paper tight to the wall. It does a good job of moving the gas smell from lawn equipment out of the shed during the hot summer days.

I bought a second fan after the first one died after 2 months of use. A fan and photovoltaic cells should last years, not months.

First - This is a novel device and the premise is a good one: a solar powered vent fan that fit nicely in a 4" thin wall PVC vent pipe. Mine arrived on-time and did not exhibit any of the defects others reported.However, when it arrived a couple of hours before dusk, I unboxed it and tried it out. It did not work at all. I tested it again the next day, a day with full sun and not a cloud to be seen, and it worked when the solar panel was aimed directly at the sun. When aiming it away from the mid-day sun, the fan immediately slowed down significantly.I returned mine because it would likely only run for a few hours and the air flow was so minimal that I deemed it ineffective. I had hopes that it would do better, much better.

I sent one back because the solar only made the fan blow for about 20 seconds . I already pu it on shelter so I returned it and gave it a bad review (bad reviews are only read rarely and not by company that made it) well I was wrong the company said if I could send them a copy of receipt they would send me a new one my computer will not let me do that so I typed out receipt # they sent me a new solar air vent and it works great put faith back in the way people treat people. this is probably to long

If the sun does not hit the panel it will not work. For the cost I expected a much better product. Weak airflow.

This is exactly as stated on the web site. It works perfectly with almost NO installation time or tools and best of all it when the sun is up, it just works. No complications.