The sheet metal worker has announced that he will not come in the foreseeable future, so now I might have to connect the kitchen fan myself.
The question is how to do it?
The fan will be free-hanging with a 160 mm pipe straight up, and in the ceiling, there is a prepared 130 mm horizontal pipe that goes out to the external fan motor.
I see the following steps:
1. Cut the 130 mm pipe, it is a bit too long
2. Cut the 160 mm pipe, it is likewise too long
3. Join the pipes at 90 degrees. Hmm?
Are there reducing angles/bends available, or does the sheet metal worker usually make their own? Or is it done in some other way?? (A cleaning hatch is not needed according to the chimney sweep who has already looked.)
Grateful for some input!
The question is how to do it?
The fan will be free-hanging with a 160 mm pipe straight up, and in the ceiling, there is a prepared 130 mm horizontal pipe that goes out to the external fan motor.
I see the following steps:
1. Cut the 130 mm pipe, it is a bit too long
2. Cut the 160 mm pipe, it is likewise too long
3. Join the pipes at 90 degrees. Hmm?
Are there reducing angles/bends available, or does the sheet metal worker usually make their own? Or is it done in some other way?? (A cleaning hatch is not needed according to the chimney sweep who has already looked.)
Grateful for some input!
There are different types of reducers, so that’s probably no problem.
For example here
In my opinion, it would be most convenient construction-wise to place the reducer on the vertical pipe and then use a 125 mm 90-degree bend. If you're building a drum around the 125 pipe, it will probably be easier to avoid a lump in the ceiling.
A 160 bend becomes unnecessarily bulky, but on the other hand, you might avoid some pressure loss if you reduce after the bend, but if the gain is noticeable is another matter.
Those were my amateur opinions...
For example here
In my opinion, it would be most convenient construction-wise to place the reducer on the vertical pipe and then use a 125 mm 90-degree bend. If you're building a drum around the 125 pipe, it will probably be easier to avoid a lump in the ceiling.
A 160 bend becomes unnecessarily bulky, but on the other hand, you might avoid some pressure loss if you reduce after the bend, but if the gain is noticeable is another matter.
Those were my amateur opinions...
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