3rd Party HVAC design
So am a carpenter who is trying (and failing) to design my own hvac system. I am totally stumped on the Manual D calc portion of the project and wanted to find a third party to design the system. Third party design is referenced a lot in other discussions on this site but I have had no luck finding some one to do small residential. Can someone point me in the right direction on this?
should I be looking for an engineer?
I am trying to install my own duct work to save money. I have access to a metal shop. Punching holes in ceilings to run ducts is no big deal (dumb work) I need help with the smart work (design)
My plan is to keep the main trunk as short as possible so perhaps things like friction loss may not even come into play if I use mostly metal work.
I can provide any details on home needed. I really would like a standard split system (not a mini split) so I can get make up air into the fairly tight home.
Would blower door test results be used to help in calculations? The Manual J software I used did not have a setting for “fairly tight house” only tight or leaky.
I am also considering a High velocity system because they do offer some design support.
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