Manual J S D Design Services

Fast, accurate, permit-approved load calculations and duct designs for homes.

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We provide Manual J, S, and D HVAC design services in every jurisdiction nationwide requiring code-compliant HVAC calculations. Our ACCA-approved reports are permit ready, formatted for fast approval, and tailored to your unique climate zones and IECC energy code requirements.

Why Choose MVRK

Accurate, Code-Compliant Results

Every Manual J, S, and D calculation follows ACCA standards and meets city, county, and state building requirements nationwide.

Nationwide Service

No matter where your project is located - we deliver fast, precise calculations tailored to your local climate zone.

Fast Turnaround

Most projects delivered within 3–5 days, with rush options available.

Direct, Personal Communication

You’ll work directly with Sean, the load-calculation specialist handling your project from start to finish.

How it Works

Step-by-Step

Step 1 - Submit your Project Information and Plans

Upload your plans and basic information using our intake form. We will then get back to you with any additional information we may need. After that we will provide you with a Quote based on your project's specific information.

Step 2 - We Perform the Manual JSD Calculation

We then perform the calculations in the order of Manual J (Loads), Manual S (Equipment), and Manual D (Duct Design) using IECC / ACCA standards.

Step 3 - Deliverables

Once finished you will receive a full permit ready PDF package of your home.

What We Need from You

✅ Architectural Plans (DWG or PDF)

✅ Project Adress

✅ Wall / Roof / Floor U-values or Details

✅ Window U-values & SHGC

✅ ACH / Infiltration Rate (Why we recommend a Blower Door Test)

✅ Indoor Design Temperatures

✅ Preferred Equipment (Manufacturer, Equipment Type, etc.)

✅ Any AHJ Notes

✅ Ventilation Information (ERV or HRV)

Our Services

Manual J - The Load Calculation

We use advanced ACCA-approved software to calculate the exact heating and cooling loads for your project. Every room is analyzed for insulation, windows, infiltration, and orientation to ensure your home performs at peak efficiency.

Deliverables

Full room-by-room heating & cooling load report
Design Conditions
Building envelope summary
Infiltration & Ventilation loads
Internal Gains
Climate Zone & Orientation effects

Manual S - The Equipment Selection

Using the Manual J results, we select properly matched HVAC equipment that meets system requirements without oversizing. This ensures comfort, lower energy bills, and extended equipment life.

Deliverables

Equipment selection table
Sensible / Latent Capacity Verification
Check for Oversizing Limits
Cooling and Heating Performance Data
Matching Indoor / Outdoor Unit Data
SEER/HSPF efficiency validation for compliance
Any notes for Plan Reviewers

Manual D - The Ductwork Design

We provide detailed duct layouts and sizing based on pressure drop, friction rate, and airflow balance. Each design is optimized for quiet operation, comfort, and efficiency. Duct design/layout based on your specific needs.

Deliverables

Duct layout schematic (PDF)
Supply and return airflow balance report
Friction loss Results
Velocity Checks
Supply and Return Sizing
Static Pressure & Total ESP
Ductwork Material Type

Pricing Snapshot

Service

Manual J

Manual J & S

Manual JSD

Details

Full room-by-room load calculation

Full Manual J & Proper HVAC equipment sizing

Complete ACCA-compliant set

Typical Price

$219-$1000+

$279-$1500+

$449-$2000+

Pricing varies by square footage, complexity, and equipment types. Multi-unit and Builder discounts available.

Who am I?

I’m not a contractor or a software button-pusher—I’m a Mechanical Engineer with 5+ years of professional energy modeling and HVAC design experience.

My background is in full-building energy simulation, where precision matters. I work with the same tools used on commercial and high-performance buildings to evaluate heat loss, heat gain, ventilation, and system performance before equipment is ever selected.

That experience translates directly into more accurate Manual J, S, and D calculations than what most residential providers can offer.

If you want calculations done the way an engineer would do them—carefully, conservatively, and correctly—you’re in the right place.

Why it Matters

Proper design means comfort, efficiency, and peace of mind in your home.

Manual JSD calculations aren't just paperwork, they're the foundation of an efficient system that actually performs at the lowest possible cost to the homeowner. A properly sized, well balanced HVAC design ensures:

Every room reaches the correct temperature year-round.
Equipment runs efficiently and lasts longer.
Ductwork is quiet, balanced, and easy to install.
Inspectors approve your plans the first time.
Installation of equipment runs smoothly.

The result: Lower energy bills, fewer callbacks, and a system that simply works.

Our Service Areas

We are Proud to Provide Nationwide Manual JSD Services

We deliver ACCA-compliant Manual J, S & D reports anywhere in the U.S. and tailor each submittal to your local code and permit requirements. Where jurisdictions follow IECC/IRC (2015 or newer) we size equipment per Manual S using Manual J loads and provide Manual D duct design as required. If your state or city needs specific forms or documentation, we’ll work with you to ensure you receive the correct package for your specific location. No matter where your project is located, we deliver code-compliant, ACCA based reports ready for permitting.

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