About us

About us

About us

Custom HVAC Design for Families & Builders Who Want It Done Right

At Go Custom Duct Design, we specialize in helping homeowners and custom builders turn one-of-a-kind projects into homes that are comfortable, efficient, and built to last.

If you’re a homeowner, we give you peace of mind by ensuring your HVAC system is designed to keep every room in your house comfortable while meeting all code requirements for permitting and inspections.

If you’re a custom builder, we act as your design partner, providing accurate ductwork layouts, equipment sizing, and REScheck reports that help you deliver on time and on budget—without the overhead of hiring an in-house engineer.

Every project includes Manual J & D reports, Manual S equipment sizing, RESchecks, gas line sizing, revisions, and rush support when needed. No shortcuts, no guesswork—just professional engineering that makes your project easier.

Whether you’re building your dream home or managing several custom builds at once, you’ll get the same level of expert support: fast, code-compliant, and tailored to your project’s unique needs.

Services

Services

Services

Our HVAC Design Services

Comprehensive HVAC design solutions—faster, smarter, and always code-compliant.

Manual J – Load Calculations

We calculate precise heating and cooling loads for your project by analyzing insulation, windows, layout, and climate data. This ensures your HVAC system is neither oversized nor undersized—lowering energy bills, reducing equipment issues, and improving comfort.

Manual S – Equipment Selection

Using Manual J results, we select the right HVAC equipment for your project. This prevents costly oversizing or undersizing mistakes, ensures efficiency, and guarantees your system meets performance and code requirements.

Manual D – Ductwork Design

We engineer duct systems that deliver balanced airflow throughout the home. Every layout meets ACCA standards, reducing noise, minimizing energy loss, and ensuring comfort in every room.

Manual T – Air Distribution

We determine the ideal size and placement of supply registers and return grilles for consistent airflow and maximum comfort. This eliminates hot/cold spots and ensures smooth operation.

REScheck Compliance Reports

We provide REScheck reports to verify energy efficiency and meet IECC code requirements. These reports simplify permitting and help your projects pass inspection on the first submission.

Gas Line Sizing

We calculate and size natural gas and propane piping based on demand, distance, and code requirements. This ensures safe, compliant, and reliable delivery to all appliances—no matter the fuel source.

Manual J – Load Calculations

We calculate precise heating and cooling loads for your project by analyzing insulation, windows, layout, and climate data. This ensures your HVAC system is neither oversized nor undersized—lowering energy bills, reducing equipment issues, and improving comfort.

Manual S – Equipment Selection

Using Manual J results, we select the right HVAC equipment for your project. This prevents costly oversizing or undersizing mistakes, ensures efficiency, and guarantees your system meets performance and code requirements.

Manual D – Ductwork Design

We engineer duct systems that deliver balanced airflow throughout the home. Every layout meets ACCA standards, reducing noise, minimizing energy loss, and ensuring comfort in every room.

Manual T – Air Distribution

We determine the ideal size and placement of supply registers and return grilles for consistent airflow and maximum comfort. This eliminates hot/cold spots and ensures smooth operation.

REScheck Compliance Reports

We provide REScheck reports to verify energy efficiency and meet IECC code requirements. These reports simplify permitting and help your projects pass inspection on the first submission.

Gas Line Sizing

We calculate and size natural gas and propane piping based on demand, distance, and code requirements. This ensures safe, compliant, and reliable delivery to all appliances—no matter the fuel source.

Manual J – Load Calculations

We calculate precise heating and cooling loads for your project by analyzing insulation, windows, layout, and climate data. This ensures your HVAC system is neither oversized nor undersized—lowering energy bills, reducing equipment issues, and improving comfort.

Manual S – Equipment Selection

Using Manual J results, we select the right HVAC equipment for your project. This prevents costly oversizing or undersizing mistakes, ensures efficiency, and guarantees your system meets performance and code requirements.

Manual D – Ductwork Design

We engineer duct systems that deliver balanced airflow throughout the home. Every layout meets ACCA standards, reducing noise, minimizing energy loss, and ensuring comfort in every room.

Manual T – Air Distribution

We determine the ideal size and placement of supply registers and return grilles for consistent airflow and maximum comfort. This eliminates hot/cold spots and ensures smooth operation.

REScheck Compliance Reports

We provide REScheck reports to verify energy efficiency and meet IECC code requirements. These reports simplify permitting and help your projects pass inspection on the first submission.

Gas Line Sizing

We calculate and size natural gas and propane piping based on demand, distance, and code requirements. This ensures safe, compliant, and reliable delivery to all appliances—no matter the fuel source.

All Services Included • Volume-Based Pricing

All Services Included • Volume-Based Pricing

All Services Included • Volume-Based Pricing

Every Plan Includes Everything — Pricing Scales With Volume

Simple, volume-based plans — one rate, all-in service, no confusing tiers.

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.

Starter 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

Starter 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

Starter Builder

50 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.

FAQs

FAQs

FAQs

Answering Your Questions

Answering Your Questions

Answering Your Questions

Clear answers so you can start your project with confidence.

Clear answers so you can start your project with confidence.

Clear answers so you can start your project with confidence.

Get in touch

Get in touch

Get in touch

What exactly does Go Custom Duct Design do?

We provide engineered HVAC ductwork designs, Manual J/S/D/T calculations, REScheck compliance reports, and gas line sizing for builders, contractors, and homeowners. Our goal is to deliver fast, accurate, and affordable designs that pass inspection the first time.

Do you work with both builders and individual homeowners?

Yes. We support large track home builders, custom home builders, HVAC contractors, and families building their own homes. If your project needs HVAC design, we can help.

What are Manual J, S, D, and T calculations?

These are industry-standard engineering protocols used to properly size equipment, design ductwork, and ensure comfort and efficiency. They’re required by code in most jurisdictions.

What is a REScheck and why do I need it?

REScheck is a compliance report that verifies your home meets energy efficiency standards required by building codes. It’s often mandatory for permitting and helps ensure your build passes inspection smoothly.

Can you size gas lines for my project?

Yes. We calculate gas pipe sizing to ensure safe and code-compliant fuel delivery for all appliances. This is critical for both performance and safety.

Do you work on commercial projects too?

Yes, we can take on select commercial projects under 3,000 sq. ft. in certain areas. Contact us to discuss your project details.

Do you offer a la carte services?

Yes. If you only need specific services, such as Manual J & D reports or REScheck compliance, we can provide them individually—even at scale for high-volume builders.

How quickly can you deliver designs?

Most single-home projects are completed in 3–5 business days. Larger or multi-home developments may take longer, but we always provide a clear timeline upfront.

Why should I choose Go Custom Duct Design instead of hiring in-house?

Hiring in-house is costly and time-consuming. We deliver the same expertise (if not more), at a fraction of the cost, and on a much faster timeline. Plus, you only pay when you need us—no salaries, benefits, or overhead.

How do I get started?

Send us your plans and questions by giving us a call, sending an email, or even shooting us a text. Once we understand your project needs, we’ll walk you through the next steps and provide a free quote.

Do you provide services nationwide?

Yes. Go Custom Duct Design serves clients in all 50 states. We understand that requirements vary from city to city and state to state, and we tailor every design to meet local codes and standards.

What standards do you follow in your designs?

Every HVAC design is built to ACCA standards (Manual J, S, D, T), informed by ASHRAE guidelines, and completed using professional WrightSoft software. We hold ourselves to these industry standards so that your project is code-compliant, efficient, and inspection-ready.

Can I customize a plan to fit my needs?

Absolutely. Every builder and homeowner is different, and we can adjust services to match your exact requirements. Whether you need the full package or only select deliverables, we’ll design a plan that works for you.

What if my volume changes from month to month?

Our plans are flexible. If your project load increases or decreases, we’ll adjust the plan to keep your costs aligned with your actual needs.

Can you handle propane gas lines as well as natural gas?

Yes. We size and design both propane and natural gas piping to ensure safety, compliance, and reliable delivery to your appliances.

What exactly does Go Custom Duct Design do?

We provide engineered HVAC ductwork designs, Manual J/S/D/T calculations, REScheck compliance reports, and gas line sizing for builders, contractors, and homeowners. Our goal is to deliver fast, accurate, and affordable designs that pass inspection the first time.

Do you work with both builders and individual homeowners?

Yes. We support large track home builders, custom home builders, HVAC contractors, and families building their own homes. If your project needs HVAC design, we can help.

What are Manual J, S, D, and T calculations?

These are industry-standard engineering protocols used to properly size equipment, design ductwork, and ensure comfort and efficiency. They’re required by code in most jurisdictions.

What is a REScheck and why do I need it?

REScheck is a compliance report that verifies your home meets energy efficiency standards required by building codes. It’s often mandatory for permitting and helps ensure your build passes inspection smoothly.

Can you size gas lines for my project?

Yes. We calculate gas pipe sizing to ensure safe and code-compliant fuel delivery for all appliances. This is critical for both performance and safety.

Do you work on commercial projects too?

Yes, we can take on select commercial projects under 3,000 sq. ft. in certain areas. Contact us to discuss your project details.

Do you offer a la carte services?

Yes. If you only need specific services, such as Manual J & D reports or REScheck compliance, we can provide them individually—even at scale for high-volume builders.

How quickly can you deliver designs?

Most single-home projects are completed in 3–5 business days. Larger or multi-home developments may take longer, but we always provide a clear timeline upfront.

Why should I choose Go Custom Duct Design instead of hiring in-house?

Hiring in-house is costly and time-consuming. We deliver the same expertise (if not more), at a fraction of the cost, and on a much faster timeline. Plus, you only pay when you need us—no salaries, benefits, or overhead.

How do I get started?

Send us your plans and questions by giving us a call, sending an email, or even shooting us a text. Once we understand your project needs, we’ll walk you through the next steps and provide a free quote.

Do you provide services nationwide?

Yes. Go Custom Duct Design serves clients in all 50 states. We understand that requirements vary from city to city and state to state, and we tailor every design to meet local codes and standards.

What standards do you follow in your designs?

Every HVAC design is built to ACCA standards (Manual J, S, D, T), informed by ASHRAE guidelines, and completed using professional WrightSoft software. We hold ourselves to these industry standards so that your project is code-compliant, efficient, and inspection-ready.

Can I customize a plan to fit my needs?

Absolutely. Every builder and homeowner is different, and we can adjust services to match your exact requirements. Whether you need the full package or only select deliverables, we’ll design a plan that works for you.

What if my volume changes from month to month?

Our plans are flexible. If your project load increases or decreases, we’ll adjust the plan to keep your costs aligned with your actual needs.

Can you handle propane gas lines as well as natural gas?

Yes. We size and design both propane and natural gas piping to ensure safety, compliance, and reliable delivery to your appliances.

What exactly does Go Custom Duct Design do?

We provide engineered HVAC ductwork designs, Manual J/S/D/T calculations, REScheck compliance reports, and gas line sizing for builders, contractors, and homeowners. Our goal is to deliver fast, accurate, and affordable designs that pass inspection the first time.

Do you work with both builders and individual homeowners?

Yes. We support large track home builders, custom home builders, HVAC contractors, and families building their own homes. If your project needs HVAC design, we can help.

What are Manual J, S, D, and T calculations?

These are industry-standard engineering protocols used to properly size equipment, design ductwork, and ensure comfort and efficiency. They’re required by code in most jurisdictions.

What is a REScheck and why do I need it?

REScheck is a compliance report that verifies your home meets energy efficiency standards required by building codes. It’s often mandatory for permitting and helps ensure your build passes inspection smoothly.

Can you size gas lines for my project?

Yes. We calculate gas pipe sizing to ensure safe and code-compliant fuel delivery for all appliances. This is critical for both performance and safety.

Do you work on commercial projects too?

Yes, we can take on select commercial projects under 3,000 sq. ft. in certain areas. Contact us to discuss your project details.

Do you offer a la carte services?

Yes. If you only need specific services, such as Manual J & D reports or REScheck compliance, we can provide them individually—even at scale for high-volume builders.

How quickly can you deliver designs?

Most single-home projects are completed in 3–5 business days. Larger or multi-home developments may take longer, but we always provide a clear timeline upfront.

Why should I choose Go Custom Duct Design instead of hiring in-house?

Hiring in-house is costly and time-consuming. We deliver the same expertise (if not more), at a fraction of the cost, and on a much faster timeline. Plus, you only pay when you need us—no salaries, benefits, or overhead.

How do I get started?

Send us your plans and questions by giving us a call, sending an email, or even shooting us a text. Once we understand your project needs, we’ll walk you through the next steps and provide a free quote.

Do you provide services nationwide?

Yes. Go Custom Duct Design serves clients in all 50 states. We understand that requirements vary from city to city and state to state, and we tailor every design to meet local codes and standards.

What standards do you follow in your designs?

Every HVAC design is built to ACCA standards (Manual J, S, D, T), informed by ASHRAE guidelines, and completed using professional WrightSoft software. We hold ourselves to these industry standards so that your project is code-compliant, efficient, and inspection-ready.

Can I customize a plan to fit my needs?

Absolutely. Every builder and homeowner is different, and we can adjust services to match your exact requirements. Whether you need the full package or only select deliverables, we’ll design a plan that works for you.

What if my volume changes from month to month?

Our plans are flexible. If your project load increases or decreases, we’ll adjust the plan to keep your costs aligned with your actual needs.

Can you handle propane gas lines as well as natural gas?

Yes. We size and design both propane and natural gas piping to ensure safety, compliance, and reliable delivery to your appliances.

Contact

Contact

Contact

Get in touch

Have questions or ready to partner with us? Let’s make your HVAC design effortless.

Office

Remote (Nationwide Service)

Remote (Nationwide Service)

Email

george@gocustomductdesign.com

Telephone

+1 435-999-8414

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