McGiever wrote:[quote]It would be great if the fans had extension tubes for easy access (my gas furnace fan has such tubes). That oil hole inside my combustion fan's AC cord connection box is quite difficult to reach.
This was a great idea...now only by a DIY'r
Unless the motor shown was built with the supports for the extension tubes, that is a lot of rework for something trivial to build into motor assemblies.
With an oil hole inside my fan's AC power connection box, any metal extending outside would have to be brazed or welded to the motor case to prevent voiding the UL certification.
Understand what you are saying about UL certs. That was a stock fan once upon a time. To my knowledge, nothing like that is available anymore.
Stove fans now days are mostly consumables and disposable.