HVAC Return Questions
Thanks in advance for taking the time to read my question about some duct installation that I will be doing myself in the attic.
I have an older home (‘68) in Northern Illinois that has one central return in the hallway and bedroom doors undercut probably an inch or more. I’m not the biggest fan of this because doors look stupid and I assume it doesn’t offer good air circulation among the entire floor. I also can’t see how it would be able to circulate air effectively from the family and dining room.
The central return is in the hallway and utilizes panned off floor joists and the wall cavity.
I was thinking about using this existing return air structure and installing trunkline in my attic with dedicated returns to each bedroom and dining and family room. I figured one return per supply.
My questions…. is my idea of individual returns going to make that much of a difference to be worth the effort, or am I better off installing transfer grills in the bedrooms?
To get the duct sizing right, should I reach out to one of these design companies that will design your duct run? Any recommendations on a company?
Lastly, solid duct or flexible? I know flex will be quicker, easier, and cheaper. However, is not really able to be cleaned a big enough deterrent? Solid duct will also need to be insulated since it will be in unconditioned attic, so that’s added time and money for me.
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