Residential Hvac Duct Drawing RESIDENTIAL HVAC DUCT DRAWINGS. Article contributed by: Geoffrey R. Stoddard, Hvac Designer / Detroit, Michigan Residential HVAC Duct Drawings. Initially for your hvac duct drawing you should start with a simple sketch. Improve Air Conditioning: Avoid These 5 Ductwork Design Jul 30, 2015Planning HVAC ductwork design early in your renovation process can help avoid 5 expensive ductwork design mishaps that cause comfort and air quality issues. Commercial HVAC, Residential HVAC Improve Air Conditioning: Avoid These 5 Ductwork Design Mistakes.