Nutone HD80NT Exhaust Fan Incorrectly Rated for Continuous Operation I bought this exhaust fan from Home Depot at a price of $94 plus tax. It wasn’t the most expensive exhaust fan they had but there were a whole boatload a lot cheaper. I bought this was expressly because it was the only one I found that stated clearly on the box that it was rated for continuous operation. NOT! From the Nutone Web Site Model HD80NT 80 CFM Heavy Duty Fan • 80 CFM, 2.5 Sones • Totally enclosed motor design for continuous operation. After installing it which was a total pain as it was replacing an existing fan but that is another whole story, it ran for a whopping three days before is started making straining noises. I turned it off and let it sit for 8 hours and turned it back on, it ran for a day and started making noises again. I s...