WHY CONTRACTORS CHOOSE US
Built for the field. Trusted in the office.
Since 2008
One of the original firms offering Manual J nationwide online.
Nationwide Service
Permit-ready reports for all 50 states.
ACCA Certified
Reports built to ACCA Manual J, D, S and N standards.
Permit-Ready
Pass plan review the first time, every time.
Next-Day Turnaround
Rush service available when deadlines can't slip.
Thousands of Projects
Trusted by contractors, builders & architects.
OUR SERVICES
ACCA-compliant reports for every project.
HOW IT WORKS
From plans to permit in 4 simple steps.
01
Upload Plans
Send PDFs, blueprints or sketches.
02
We Review
Our engineers review and confirm scope.
03
Receive Invoice
Approve a clear, fixed-price invoice.
04
Get Reports
Permit-ready PDFs delivered to your inbox.
NORMAL DELIVERY
4 Business Days
RUSH SERVICE
Next Business Day
WHO WE SERVE
Trusted across the trades.
HVAC Contractors
Architects
Builders
Engineers
Remodelers
Homeowners
TRUSTED & CERTIFIED
ACCA Certified
Made in USA
EPA Recognition
Since 2008
BBB A+ Rating
Nationwide Service
TESTIMONIALS
What contractors say.
"Reports came back next day and passed permit review with zero comments. Heat Load USA is our go-to."
Mike R.
HVAC Contractor, NJ
"Saved us a week on a 14-unit multifamily. The Manual D layout was clean and the inspector loved it."
Sara T.
Builder, FL
"Professional, accurate, and they pick up the phone. Best Manual J service we've used in 12 years."
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Dan P.
Mechanical Contractor, TX