I'm building a simple, two story home at the coast of north Carolina (south of wilimington near the NC/SC border in Brunswick County). Nothing fancy, however I'm GCing the job remotely. As such, I'd like to quote and contract the HVAC work off a detailed plan in lieu of the typical builder plans that provide no details whatsover and leave the details up to the individual HVAC contractor.

Can someone recommend a designer who does this kind of work and who might be familiar with the particulars of coastal homes built on pier foundations? The pier foundation isn't a big deal, but it does present unique challenges with respect to return locations and the outside condensing units.