Western America's Trusted Load Calculation Experts
Code-compliant Manual J, D & S reports for contractors across Idaho, Oregon, Washington, Arizona, New Mexico, and Utah.
Complete Load Calculation Solutions
Load Calculation
Room-by-room heating and cooling load analysis to determine accurate equipment sizing for optimal comfort and efficiency.
Duct Design
Professional duct sizing and layout design to ensure proper airflow distribution throughout your project.
Equipment Selection
Recommended equipment specifications based on load calculations and project requirements.
From Plans to Reports in 5 Days
Submit Plans
Send us your project plans, building details, and specifications.
We Run Calculations
Our design professionals perform room-by-room load calculations using industry-standard methodology.
Quality Review
Each report undergoes thorough review to ensure accuracy and code compliance.
Reports Delivered
Inspection-ready reports delivered in 5 business days, or 48 hours for rush service.
Save with Contractor+
Join our membership program and get 5% off every order, plus exclusive benefits and priority service.
5% Discount
Save 5% on every order, plus get exclusive portal access, educational resources, and priority support.
Priority Portal
Exclusive online ordering system with real-time project tracking and history.
Resources & Updates
Educational materials, code updates, and exclusive member communications.
Why Contractors Choose Manual J USA
Accurate Reports You Can Trust
Every report is meticulously calculated and reviewed to ensure code compliance and accuracy you can rely on.
Bundled Pricing, No Surprises
Manual J, D & S all included in one transparent price. Volume discounts or Contractor+ savings — whichever is greater applies to your order.
Built for the Western US
Specialized expertise in western climate zones and building codes. Local knowledge, national standards.