About Our Load Calculation Service

Our HVAC Load Calculation Team

We've been doing residential HVAC load calculations since 1995 — more than 30 years focused on one thing. Not a sideline service, not an add-on to an installation business.

What we do

We run full Manual J load calculations, Manual S equipment selection, and Manual D duct design using WrightSoft — the industry-standard ACCA-approved software — on every project. Every report is permit-ready and defensible.

Our work is residential primary. We also take on select light commercial: small offices, rec centers, and similar projects. We do not do large commercial or industrial.

How we work

• You send us your floor plans, elevations, and specifications
• We run a room-by-room Manual J using your actual design conditions
• Reports are delivered in 24–48 hours, permit-ready
• We work remotely — no site visit required
• We serve all 50 states

Our credentials

• In the trade since 1995 — 30+ years of residential load calculations
• State Certified Mechanical Contractor — Florida, Georgia, North Carolina, Alabama, South Carolina
• ASHRAE Member #8139979
• ACCA Member
• WrightSoft ACCA-approved software on every project

What makes a load calculation worth doing right

The software does the arithmetic. The judgment — knowing what the tool can and can't see, catching the ceiling height on a section that changes the cooling load, reading the window schedule instead of estimating SHGC — is what 30 years of field experience adds. That's the moat between a number that passes plan review and a number that actually sizes the equipment correctly.

For more on the methodology, see our Manual J overview, the heat gain and heat loss primer, and our areas served page for climate-specific work.