Custom HVAC Engineering
From single-family homes to large-scale mulit-family developments, Go Custom Duct Design delivers expert ductwork engineering that’s fast, accurate, and cost-effective.
Your Trusted Partner in HVAC Design
At Go Custom Duct Design, we take the hassle of HVAC engineering off your plate. Founded by George Owens, a veteran, and ductwork engineer, we deliver all the expertise of an in-house designer—without the overhead, training, or management.
Every client, no matter the size, gets the same all-inclusive service: Manual J & D reports, RESchecks, gas line diagrams, revisions, code updates, rush jobs, and ongoing support. Our mission is simple: make HVAC design faster, more accurate, and more affordable for builders, contractors, and homeowners alike.
Whether you’re building one custom home, managing a subdivision, or just need a single project done right, we provide expert designs tailored to your needs. By working with us, you gain a dedicated partner who ensures every project is code-compliant, efficient, and built for comfort—so you can keep building with confidence and never worry about HVAC design again.
Our HVAC Design Services
Comprehensive HVAC design solutions—faster, smarter, and always code-compliant.
At Go Custom Duct Design, every tier includes the full package: Manual J & D load and duct designs, Manual S equipment selection, Manual T air distribution, REScheck compliance, gas line sizing & diagrams, unlimited revisions, 3–5 day turnaround, rush support when needed, coordination calls, and ongoing code updates.
The only difference between tiers is monthly volume (e.g., 10, 25, 50, 75+ homes). Pricing adjusts to your expected volume—no feature gating, no surprises. Contact us today for the plan that fits your pipeline.
A La Carte
Specific Needs
Manual J & D Reports – Accurate load calculations and ductwork design for efficiency and compliance
Manual S – Equipment Selection – Properly sized, code-compliant HVAC equipment recommendations
Manual T – Air Distribution Design – Balanced airflow for comfort and performance
REScheck Compliance Reports – IECC 2018–2024 energy compliance for permitting
Gas Line Sizing & Diagrams – Safe, accurate, and code-compliant gas line layouts
Unlimited Revisions – Flexible support until your design is right
3–5 Day Turnaround – Fast delivery that keeps projects moving
Rush Jobs When Needed – Urgent projects prioritized without penalty
Code Updates Included – Always designed to the latest standards
Coordination Calls – Direct access for questions and plan reviews
On-Site Visits Available – Travel covered by client when needed
Homeowner
5+ Homes/mo
Manual J & D Reports – Accurate load calculations and ductwork design for efficiency and compliance
Manual S – Equipment Selection – Properly sized, code-compliant HVAC equipment recommendations
Manual T – Air Distribution Design – Balanced airflow for comfort and performance
REScheck Compliance Reports – IECC 2018–2024 energy compliance for permitting
Gas Line Sizing & Diagrams – Safe, accurate, and code-compliant gas line layouts
Unlimited Revisions – Flexible support until your design is right
3–5 Day Turnaround – Fast delivery that keeps projects moving
Rush Jobs When Needed – Urgent projects prioritized without penalty
Code Updates Included – Always designed to the latest standards
Coordination Calls – Direct access for questions and plan reviews
On-Site Visits Available – Travel covered by client when needed
Custom Builder
10+ Homes/mo
Manual J & D Reports – Accurate load calculations and ductwork design for efficiency and compliance
Manual S – Equipment Selection – Properly sized, code-compliant HVAC equipment recommendations
Manual T – Air Distribution Design – Balanced airflow for comfort and performance
REScheck Compliance Reports – IECC 2018–2024 energy compliance for permitting
Gas Line Sizing & Diagrams – Safe, accurate, and code-compliant gas line layouts
Unlimited Revisions – Flexible support until your design is right
3–5 Day Turnaround – Fast delivery that keeps projects moving
Rush Jobs When Needed – Urgent projects prioritized without penalty
Code Updates Included – Always designed to the latest standards
Coordination Calls – Direct access for questions and plan reviews
On-Site Visits Available – Travel covered by client when needed
Production Builder
25+ Homes/mo
Manual J & D Reports – Accurate load calculations and ductwork design for efficiency and compliance
Manual S – Equipment Selection – Properly sized, code-compliant HVAC equipment recommendations
Manual T – Air Distribution Design – Balanced airflow for comfort and performance
REScheck Compliance Reports – IECC 2018–2024 energy compliance for permitting
Gas Line Sizing & Diagrams – Safe, accurate, and code-compliant gas line layouts
Unlimited Revisions – Flexible support until your design is right
3–5 Day Turnaround – Fast delivery that keeps projects moving
Rush Jobs When Needed – Urgent projects prioritized without penalty
Code Updates Included – Always designed to the latest standards
Coordination Calls – Direct access for questions and plan reviews
On-Site Visits Available – Travel covered by client when needed
High-Volume Builders (75+ homes/month)
Custom pricing available — let’s talk.
See How Our Designs Deliver Results
From single-family homes to large-scale developments, we engineer HVAC solutions that save time, cut costs, and pass inspection the first time.
What Our Clients Say
Builders, contractors, and homeowners trust us to deliver accurate, code-compliant designs that save time and money.
Get in touch
Have questions or ready to partner with us? Let’s make your HVAC design effortless.