HVAC Load Calculations for Permits and Code Compliance Nationwide.
Residential Manual J load calculations, Manual S equipment selection, and Manual D duct design, plus RTS load calculations for light commercial projects across all 50 states.
Send us your plans. Your quote confirms the calculations and design documents included. Typical residential turnaround is 3 to 5 business days after complete information is received, subject to scope and scheduling. Commercial timing is confirmed after scope review.
Expert HVAC Design Services for Residential and Commercial Properties
ProCalcs is a licensed and insured HVAC design company based in Jensen Beach, Florida, providing residential Manual J load calculations, Manual D duct design, Manual S equipment selection, and Manual T air distribution design, plus ASHRAE RTS load calculations for light commercial projects. Your quote confirms the design services and energy compliance documentation included in your project.
Residential
Light Commercial
Our Services
HVAC calculations and design documentation for residential and light commercial projects. Your quote identifies the services and documents included; permit requirements depend on the project and local building department.
Manual J Calculations
Determines the total amount of heat gained or lost externally or internally in residential properties.
Read More →Manual S Calculations
Covers sizing strategies for all types of cooling and heating equipment, as well as how to use manufacturer's performance data.
Read More →Manual D Calculations
The ANSI-recognized national standard for residential HVAC duct design will help you design a duct system in less time.
Read More →Manual T Calculations
Air distribution design: register and grille selection, sizing, and placement for balanced airflow. Included when specified in your quoted scope.
Read More →RTS Method Calculations
ASHRAE Radiant Time Series cooling load calculations for light commercial projects, modeling how heat enters the building hour by hour.
Read More →Energy Code Compliance Calculations
REScheck and COMcheck energy compliance documentation for building permit approval.
Read More →How It Works
Submit Project Info
Upload your plans, specs, and project details for your HVAC load calculations.
Receive Your Quote
We send a clear scope and pricing, typically the same business day.
We Run Calculations
Our HVAC designers complete the calculations and design work specified in your quote, using residential Manual J, S, and D methods or commercial RTS load calculations as applicable.
Get Permit-Ready Docs
Receive the documents included in your quoted scope for your local building department’s review. Confirm required submissions with the department.
Who We Serve
HVAC Contractors
Permit-ready calculations and duct designs to support bids, installations, and building department approvals.
Read More →Builders and Developers
Complete HVAC design packages for residential and light commercial construction projects.
Read More →Architects and Engineers
Technical HVAC specifications and load calculations that integrate with building plans.
Read More →Homeowners
Independent load calculations and equipment recommendations for renovations and system replacements.
Read More →Find out how much you can save on your project!
Get a Free QuoteNamed a 2026 Trade Partner Excellence Honoree by Beachland Homes Corp.
"For consistently delivering innovative mechanical (HVAC) engineering and system design solutions..."
