Review on 🏠 Hon&Guan 4" Home Ventilation Fan: Ultra Silent Garage Exhaust Fan for Kitchen with 5W LED Light by Opal Holmberg

I bought this fan for cross ventilation in my RV. Small room. You can't go through the roof, the walls are very narrow. I needed something that would work within these constraints. The bonus was that this looked very nice and matched the room very well. Mine did NOT come with a built in rear linkage damper. Engineered a backplate to get the proper distance from the wall and installed it with a cheap hooded external vent (you know, really light plastic vents with very thin flaps that don't even have a spring). I wanted to fit an in-line spring loaded check valve into a cheap hooded bleeder valve. However, this fan is not even enough to lift the plastic shutter. I have a 23 CFM muffin fan that provides more airflow. I chose to keep it for myself rather than return it due to its looks and the amount of work and materials I've already put into this particular fan. But being nothing more than a cheap plastic cover over a non-working fan is very expensive.