Quote:
Originally Posted by retiredguy123
The code says that the inside of the duct must be "smooth", but it is somewhat unclear as to whether the end can be crimped. It appears that some installations use a smooth end and others use a crimped end. If you want to make the inside of the vent pipe to be more smooth you can use a plastic transition piece between the flexible dryer duct and the crimped metal pipe. This transition piece will fit inside of the metal duct. But, I tend to agree with Poster No. 7 that it is probably insignificant.
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You may want to look into an all in one washer dryer that is ventless. I would recommend the GE one.