by Tradewinds Appropriate Technologies, LLC

Precision HVAC Load Calculations Start Here

Whether you’re designing new construction or retrofitting an existing home, our fast, code-compliant Manual J designs ensure accuracy, efficiency, and peace of mind.

New Home

Are you building a new house and want it to be comfortable? Read our article on why you need to have a load calculation done on your house.

Once you understand why HVAC design is important, let us do the hard work!

Contractor

Are you a heating or air conditioning contractor looking for design assistance for an energy efficient home?

Are you a heating or air conditioning contractor wanting training to advance your skills in order to design for comfort and efficiency?

Are you a builder wanting to design a home for comfort and efficiency?

Problems

Are you a home owner that has problems with your HVAC?
If your house is:
• Too Hot •
• Too Cold •
• Making you sick •
• Too humid •
We can help you out

What We Do

Accurate. Compliant. On-Time.

With thousands of successful heat load calculations performed, we partner with you for headache free compliance with building codes. Our reports are ACCA Manual J 8th Edition compliant, utilizing our business’s process technologies and RHVAC software built by Elite Software. We provide Manual J calculation services nationwide. Our pricing includes a preview and a finale report. We offer different turnaround times to suit your needs. We serve HVAC contractors, builders, architects, engineers, as well as homeowners.

Manual J Load Calculations

 ACCA-compliant reports to ensure accurate sizing and system efficiency

Manual S Equipment Selection

 Match heating and cooling equipment perfectly to your building’s needs.

Manual D Duct Design

 Optimized airflow and duct layout for maximum performance.

Permit-Ready Documentation

 Our reports are built for approval—fast and frustration-free.

Who Do We Serve

HVAC Support for Every Role in the Build Process

 From residential builders to MEP engineers, we help you save time and stay compliant.

HVAC Contractors & Techs

Confidently bid and install systems that are sized correctly and pass inspection.

Architects & Builders

Fast and expert load calcs help avoid costly redesigns or installs and ensure code compliance.

HVAC Sales Pros

Bid confidently and close deals with expert suport and pro-grade documentation.

Home Owners

Resolve AC problems and avoid overspending on oversized equipment.

Why Choose Manual J Design Studio

Smart, Fast, and Done Right!

  • Code-Ready: Our Manual J, S & D reports are accepted in all 50 states. 
  • Transparent Pricing: Flat-rate fees. No hidden costs. 
  • Fast Turnaround: Once background detail is provided, most reports are delivered in 5-7 business days with expedited services available.
  • Expert Support: We guide you as part of our design service and expert consultation is available for related matters including assessments, audits, etc. 

Custom load calculations conducted by an experienced third party like Tradewinds’ Manual J Design Studio will equip you with a design that will provide a comfortable, energy efficient living experience.

Need Help or Training?

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