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September 19, 3:30 PM [GMT -5]

I had to go through a 9" concrete foundation to vent my dryer. In case anyone else has to as well, here are some issues I couldn't find answers to:

1) A 4" diamond hole saw WILL allow a 4" vent pipe to pass through. I went through a 5.5" interior masonry wall and a 9" foundation wall with the 4" diamond hole saw and the venting fit. It was tight, but it fit. None of the rental places near me have those saws in 1/4" increments, so I was nervous about it fitting but didn't want to cut a 5" hole and have the excess gap.

2) Drill a pilot hole before using the hole saw on the foundation. I got cheap at the rental place and didn't rent a long masonry bit. My vent hole in the foundation ended up a little off. I salvaged it but much further off and I would have been in big trouble.

3) Drilling a 4" hole through a 9" thick foundation and a 5.5" interior masonry wall is a chore. The tight spaces, weight of the drill, and my inexperience caused it to take about 3 hours to drill the 2 holes, and they're not perfect (and those 3 hours felt like a lot longer). If I had to do it again, I would strongly consider hiring a company that does that kind of drilling. I'm a healthy 33 year old and my back was pretty sore the next day.

November 23, 3:54 PM [GMT -5]

I live in upstate New York, so during the winter months, we have an average of 3 feet of snow on the ground. Your instructions say to keep the vent at least 12" above the ground. With the amount of snow we receive, is this enough? Also, what about insects/rodents entering the house thru the vent?

May 01, 10:29 AM [GMT -5]

This project cost me more than $100 and I had many of the tools in advance. Here was my breakdown:
- 3 - 5' sections of 4" galvanized steel ductwork: $23
- 2 - 90 degree 4" galvanized steel elbows: $8
- 25' galvanized steel hanger tape: $4
- 2.5" x 50 yards HVAC foil tape: $20
- 4" galvanized hood vent: $20
- 10 oz. exterior caulk: $6
Materials: $81

- 3/8" x 10" SDS drill bit: $14
- 4-1/4" bi-metal hole saw: $27
- sheet metal crimpers: $20
Tools: $61

I think that this project is very important and I appreciate Family Handyman's step-by-step instructions, but I think that the costs associated with the project on the website were a little misleading.

January 22, 9:49 AM [GMT -5]

-- good idea also to pull all your ducts and vacuum them every other year or when possible.
In the project note that the window is glass block... if you have a window that opens make sure you install the vent more than 3 feet away (or farther) otherwise when you open the window (or if it's leaky) you'll find your dryer venting possibly right back in.

July 22, 3:50 PM [GMT -5]

Just talked to the building inspector. In Cecil County MD the dryer vent has to be at least ten feet from a propane regulator.

JM

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