MaxxFan 00-06200K Ventilation Fan with Smoke Lid & Manual Keypad Control - RV, Camper, Van, Boat Roof Vent Fan for Airflow & Smoke Removal

"Revised" 11/29/2024Hey, these fans are excellent!I had some issues early on but Maxxair stepped up and absolutely took care of me. Thank you Maxxair. I should have revised this 1.5 years ago.I would absolutely purchase this fan again, though the current one that Maxxair helped me with works flawelessly so I don't have a need to buy another. Super quiet, high air flow, and I run it all night in our camping trailer have experienced no negative effects, and this is on my trailer batteries for days at a time. It uses very little juice. I highly recommend. I'm sure Maxxair has removed all the ones with circuit boards that were having problems. I would buy with confidence. I only leave the information below from my original review to show where I've come from to where I am now with Maxxair. They solve problems!Read the negative reviews and believe them. I took a chance against my better judgement and purchased this fan. Just like you'll read in negative reviews and in a host of forums, for many buyers this fan runs perfectly for a while, then one day you turn it on, it runs for 10 seconds, then you get a loud obnoxious beep for about 10 seconds and it won't run. Everything I've researched says its board has very strict voltage requirements. RV's simply don't lock on to exactly 12v all day and night. Shore power, battery charge fluctuations and other factors cause a voltage variance. Everything else in my trailer runs fine with these variances, but apparently the Maxxair board was designed to operate in a vacuum with minimal voltage fluctuation. I've reached out to Maxxair but have not yet heard back. For the two days it functioned it was great. I'd recommend shopping other brands. If I get a positive solution from Maxxair I'll quickly update this review.Update 9/12/22 Still nothing from Maxxair except for the auto reply to my email 4 days ago saying someone will respond to me quickly!Update 4/25/2023. Maxxair is sending me a new circuit board. There was no explanation, just an email stating that I'll be receiving one. Hopefully this makes the fan function as it should. If it does, I'll amend this review.