Broan Black 639 Wall Cap for 3-1/4" x 10" Duct for Range Hoods and Bath Ventilation Fans
Score By Feature
OveReview Final Score
Product Description
Questions & Answers
It's for a rectangular duct that measures 3 1/4" x 10" in size.
The first thing you should do is take hold of the vent. Never cut anything until you've taken the time to measure the piece you're going to put in. The vent, on the other hand, was a perfect match for the hoods we install. The vent is designed to fit the template included in the stove hood's manufacturer's box. Then you'll need a stud finder and an electronic detector to figure out what's going on inside the wall. You're ready to cut out the hole now that you've completed all of the preceding steps. To connect the hood and the vent, you'll need to measure the piece in your hand and allow about a quarter-inch extra opening. It takes two people to complete this task.
It is a one-star rating. a set of pieces From the outside of the wall, we mounted it directly to the hood.
Tops of 4 to 5 inches I no longer live there, but I recall liking how it didn't protrude too far.
Selected User Reviews For Broan Black 639 Wall Cap for 3-1/4" x 10" Duct for Range Hoods and Bath Ventilation Fans
However, I would have given it a five-star rating if I could. My item's box had already been opened (almost as if it had been returned and resold), and the manufacturer could have done a better job weatherproofing it if it was going to be used as a range duct to the outside. The bottom of the inner flap is sealed, but the other three sides are not. I didn't want bugs to get in through the gaps in the unsealed sides, and I also wanted it to be airtight even when the range hood fan was turned off. I had to purchase 3/16 weatherstrip, remove the screen, and install the weatherstrip on the sides that were not sealed. In the winter, I no longer have to be concerned about bugs getting in or heat escaping through the vent. In the winter, it won't let any cold air in. Aside from that, the build quality is excellent, and the included instructions are simple to follow.
This is a heavy-duty wall cap made of thick metal, not the tinfoil aluminum ones found in big box stores. I docked one star because, as with another Broan 4" round cap I bought to vent a bathroom fan, the Broan factory's finishers need some CMFE (Continuing Metalwork Finishing Education), as both wall caps had mis-aligned screws. insulation is missing and the pipes are not aligned. There was only foam insulation along the bottom of the wall cap for this one, which the spring-loaded door slammed against. Seals with loaded flappers (imagine a rectangle - Only the bottom long side was insulated with foam - Insulation on the left and right sides, as well as the top, was missing). Furthermore, this single insulation strip had been installed incorrectly. arranged in such a way that there was a gap at the end If you live somewhere with cold winters, it's critical that your vent cap flapper has a tight and complete seal; otherwise, cold air entering the microwave could cause frozen condensation to form inside the microwave. After removing the bird screening (which was held in place by friction), I had to carefully and slowly pull up the insulation strip and re-install it. It's time to put it in its rightful spot. Then I had to go to Big Orange to get some 3/8" wide by 3/16" thick foam insulation, which I applied to the three sides that were missing, and that sucker was sealed up tight once the flapper was down. I had to trim back the part of the installation that poked through the wall in my case. Tin snips were not an option due to the thick gauge metal. My jig saw with a metal cutting blade got the job done quickly, but wear ear protection because cutting flapping metal isn't a quiet job. Because of the heavy duty gauge of the metal, I'd buy it again even after MacGuyvering it to my satisfaction. Prepare to finish Broan's job for them.
This ventilation duct was purchased for a custom application, but the general concept is the same as what would be intended in most cases. My problem was that I had a portable air conditioner installed in my office and didn't like the cheap plastic window insert that connects the inside exhaust ducting to the outside. I found this Broan Black wall cap and decided that the rectangular portion that normally goes into the wall could be cut down to just 1. 5 inches (the thickness of my enamel painted wood insert), which, unlike the cheap plastic with no exterior rain guard hood, would also protect against rain water intrusion, which can be a problem in Florida because it is often accompanied by high wind gusts. Instead of caulking, I used a narrow strip of rubber automotive weather stripping on the perimeter flange, which was compressed tight when I screwed the vent cap to the wood. Needless to say, everything went off without a hitch. The vent cap is well-made, looks great, will keep any rain out, and if it worked for me on this custom installation, it will almost certainly work just as well in the original conventional installation.
This worked well for venting a new over-the-range microwave to the outside, despite the fact that the duct's horizontal dimension is only about 10 inches. 25 inches, so that there is a gap when it mates with a standard 3x10 duct from the inside, which I caulked with high temp silicone to prevent air leakage. However, there is an additional. One of the "big box" stores had a similar heavy duty cap with a longer duct that might work better for going through 2x6 construction outside walls, but the Broan 639 cap has far better bonded paint, a good damper, and a screen to keep critters out. So, before installing the Broan cap, I had to first add a short piece of standard 3x10 duct to the microwave's back. This Broan cap outperformed the competition on the whole.
3 1/2 stars (out of a possible four) The Broan 639 Wall Cap was a perfect match for the same unit that had been installed in my home 30 years before. The original unit needed to be replaced because it had become quite rusted, despite the fact that it was still functional. Despite the fact that I am not a Prime subscriber, the Broan 639 Wall Cap was exactly as described and arrived at Prime speed. It also appeared to be the same steel thickness as the original. When unboxing the unit, one corner was damaged and two other corners were slightly bent, requiring straightening and touch-up paint before installation. The slightly lower rating is due to the bent corner issue.
Even though it isn't snug against the house, it works well and looks far better than the old rusted cap it replaced. No more birds attempting to build nests in the duct because of the screen!.
Broan's 639 Wall Cap is perfect for venting over-the-range microwaves through the wall. Most 'Big Box' offerings are inferior in terms of metal and construction quality. Nothing is more annoying than a flimsy unit tinkering with the flap and obstructing it. When you turn off the fan, this flap does not rattle and closes quietly.
25 inches in diameter. The original is 2" shorter. Overall, this is a fantastic product that is durable, well-made, and appealing to the eye. It's simple to put together, except that the duct fitting that connects to the ductwork in the wall is about 2 inches shorter than my old wall cap. To connect the two, I had to make an extension out of aluminum sheet metal, which took a long time to perfect the length.
Related Products For Broan Black 639 Wall Cap for 3-1/4" x 10" Duct for Range Hoods and Bath Ventilation Fans
