Register and Diffuser

Aug 31, 2006 2 Replies

I am currently resarching on a project trying to find out what is the single most used size of sidewall register and floor diffuser installed in homes:


  1. Homes more than 30 years old
  2. Homes less than 30 years old
  3. Apartments
  4. any regional differences? (ex: East Coast vs the Mid-West)

Thanks for answering.



While I doubt you won't get anywhere on these questions, you could always try contacting a major grill manufacture and ask what are there most popular sizes. Try Ameriflow for starters.

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Then try several associations within the HVAC trades (Google search). I doubt there will be any real answers (the grill manufactures won't want this info to fall into the hands of their competitors and the contractors probably don't keep detailed records.

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