Mounting instructions are horrible. I came back from a business trip and the contractor had already mounted the steel mounting structure. The drywall had been done and painted, but he mounted it upside down because the gasket was on the wrong end. You should clearly mark which piece goes up and which piece goes down. I would suggest with different colors of paint or at least some different colors of tape. It would have been a horrible situation, but I have a machine shop on my property and was able to put new mounting studs, made a template for the upper portion and drilled holes to finally get it mounted. Many hours were wasted on this project needlessly, which cost me a lot of extra expense. It wouldn't take much effort to make clear instructions and mark the parts to ensure error free mounting. You should also give instructions for how to cut the outer shroud. We have a sloped ceiling, and the contractor had a sheet metal shop cut the upper portion. They used tin snips, and all four sides had dents. I had to recut the upper shroud myself in my shop. If your management wants to improve their image and inform customers how to cut the upper shroud, I'd be glad to share this information to save others a lot of grief. Once installed the product functions very well and looks good.
I bought the Broan 637004EX with the external 331H external exhaust fan with quietness of operation a close second to effective exhaust in mind. I chose this model since it was listed as amongst the quietest at 0.4--1.5 sones/100cfm. Also, for reasons of quietness of operation, I opted for the external exhaust, even though it complicated the installation. The 331H exhaust fan is rated at 600CFM, which translates to 2.4--9 sones. After installation per instructions with 10 inch ducting, the unit measures 46 sones at the high setting to 42 sones at the lowest setting (83--81dB). The technicians at Broan were only able to reassure me that the controls and motor are operating as designed but were not able to help me attain the noise levels advertised on their website. It should be added that since the sliding fan control is a voltage regulator (120V--80V), further voltage reduction could slow the fan further and result in quieter operation, but that is not an option offered by Broan. Our neighbors have a GE exhaust hood with an excellent range of operation, so I would recommend looking elsewhere if quiet operation is a consideration.I
I bought the Broan 637004EX with the external 331H external exhaust fan with quietness of operation a close second to effective exhaust in mind.
I chose this model since it was listed as amongst the quietest at 0.4--1.5 sones/100cfm. Also, for reasons of quietness of operation, I opted for the external exhaust, even though it complicated the installation. The 331H exhaust fan is rated at 600CFM, which translates to 2.4--9 sones.
After installation per instructions with 10 inch ducting, the unit measures 46 sones at the high setting to 42 sones at the lowest setting (83--81dB).
The technicians at Broan were only able to reassure me that the controls and motor are operating as designed but were not able to help me attain the noise levels advertised on their website.
It should be added that since the sliding fan control is a voltage regulator (120V--80V), further voltage reduction could slow the fan further and result in quieter operation, but that is not an option offered by Broan.
Our neighbors have a GE exhaust hood with an excellent range of operation, so I would recommend looking elsewhere if quiet operation is a consideration.I
This unit has out surpassed my expectations. Well lit and the outside variable exhaust motor does the job in getting rid smoke and odor.
One main advantage it's easy to keep clean, the filters pop right out and I put them into the dishwasher.
Mounting instructions are horrible. I came back from a business trip and the contractor had already mounted the steel mounting structure. The drywall had been done and painted, but he mounted it upside down because the gasket was on the wrong end. You should clearly mark which piece goes up and which piece goes down. I would suggest with different colors of paint or at least some different colors of tape. It would have been a horrible situation, but I have a machine shop on my property and was able to put new mounting studs, made a template for the upper portion and drilled holes to finally get it mounted. Many hours were wasted on this project needlessly, which cost me a lot of extra expense. It wouldn't take much effort to make clear instructions and mark the parts to ensure error free mounting. You should also give instructions for how to cut the outer shroud. We have a sloped ceiling, and the contractor had a sheet metal shop cut the upper portion. They used tin snips, and all four sides had dents. I had to recut the upper shroud myself in my shop. If your management wants to improve their image and inform customers how to cut the upper shroud, I'd be glad to share this information to save others a lot of grief. Once installed the product functions very well and looks good.