Customer Reviews for Master Flow 16 in. x 8 in. Automatic Open/Close Foundation Ventilation Crawl Space Vent in Black

I love how clean and neat they look on the house. So simple to install, much easier than I expected. I really like the efficiency of how they work. I’m happy that I no longer have to open and close my whole vents. Highly recommended.

Replaced damaged ones perfectly. Had to adjust the thermostat with the side adjustment. Works great.

This is the only way to go for air vents under your home maintenance not needed you just install them and let them do their work or job

Bought two of these over the summer and have been waiting for cold weather to see if they work walked outside at 30° and they were still open. Not sure what temperature they actually close at yet but manufacturer states they should close at 40°

Does the job - used to replace broken crawl space vent

I know these are used for crawl spaces but they also awesome for a greenhouse.

Easy to install. Like the idea that it will automatically open and close based on temperature; still will need to see if this happens as winter approaches. One concern I have is that it is plastic, so I will be waiting to see if it needs to stand up to squirrels and such over time.

Rating provided by a verified purchaser

THE Temps set at 40° degrees needs adjusting 40 is to cold it let's air under house at 60 and under iz way to cold if your trying to keep floors a warm temp

Rating provided by a verified purchaser

Rating provided by a verified purchaser

Keeps.roden5 away too

This vent automatically opens n closes. Tucks deep into vent opening.

These work great, worth the money

Installation went pretty smooth, but I’m not sure if the automatic flaps have moved

Although it looks like metal it is plastic, but solid and heavy, not flimsy.

Very good quality and sturdy. I had to do some cutting to the opening I had in the foundation to fit the new vent but looks great and much more space for air movement. Very pleased.

Works perfect. Everything is just as advertised

I should have put these on years ago! Very easy installation. I just used a regular claw hammer and flat screwdriver to chip out the mortar that held the old vents in place. The Master Flows fit in easily and perfectly and are held in place not by mortar but by four screws that tighten against the bricks of the wall. Glad to have them!