Rated 4.5 out of 5 by 16
Rated 5.0 out of 5.0 by rsterling worked perfectly
needed to increase 3 inch bathroom fan duct to 4 inch soffit vent and this worked perfectly.
September 20, 2016
Rated 5.0 out of 5.0 by astonman Just What Was Needed
I bought this because my new bath fan required a 4 inch duct but my old bath fan used a 3 inch duct. Normally you want to replace the entire duct, however the area where my 3 inch duct reached the exit vent was sealing in spray foam insulation that hardens. Rather than deal with all that I opted to use this reducer. This saved a lot of time and everything worked out great.
April 30, 2015
Rated 5.0 out of 5.0 by Spyder Great product
My uncle owned a sheet metal shop and I worked with him for many years while working for an industral plant. I made some reducers both in square and round and these products are as good as I have seen.
December 29, 2015
Rated 4.0 out of 5.0 by Ryan Saved the day!
Great option if you don't know what size duct you have in an existing unit. I purchased a bathroom vent fan with a 4" duct to replace an existing. I was able to remove the existing unit without damaging the drywall (Saves a ton of time). However, the existing duct was 3". So this product saved me a ton of time.
December 8, 2015
Rated 5.0 out of 5.0 by pepe Master flow,
Great product, I pass my city inspection.easy to install.
October 13, 2015
Rated 5.0 out of 5.0 by Homer Well made product.
I use these for work some times and I was glad to find when I went to grab one of these 4"-3" reducers it was of the better quality made than some of the lesser quality I have seen in the past.
June 16, 2015
Rated 4.0 out of 5.0 by john Served it's purpose
Works like it should, and truly the best option for reduction on my vent fan.
April 21, 2015
Rated 1.0 out of 5.0 by Marv Product was damaged during manufacturing and took me an extra half hour to get it to fit properly.
Product was not looked at prior to shipping and was sent damaged causing me extra time to repair it.
March 10, 2015